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Document and Entity Information - USD ($) $ in Billions	12 Months Ended
Document and Entity Information - USD ($) $ in Billions	Mar. 31, 2017	Apr. 27, 2017	Sep. 30, 2016
Document And Entity Information [Abstract]
Trading Symbol	CVLT
Entity Registrant Name	COMMVAULT SYSTEMS INC
Entity Central Index Key	0001169561
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-K
Document Period End Date	Mar. 31, 2017
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	FY
Amendment Flag	false
Entity Common Stock, Shares Outstanding		44,947,327
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float			$ 2.2

Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Current assets:
Cash and cash equivalents	$ 329,491	$ 288,107
Short-term investments	120,693	99,072
Trade accounts receivable, less allowance for doubtful accounts of $103 and $315 at March 31, 2017 and 2016, respectively	132,761	113,429
Prepaid expenses and other current assets	15,791	16,769
Total current assets	598,736	517,377
Deferred tax assets, net	61,018	49,976
Property and equipment, net	132,319	135,904
Equity method investment	3,621	4,579
Other assets	7,273	6,737
Total assets	802,967	714,573
Current Liabilities:
Accounts payable	117	309
Accrued liabilities	78,701	69,678
Deferred revenue	206,777	194,977
Total current liabilities	285,595	264,964
Deferred revenue, less current portion	70,803	49,889
Other liabilities	3,934	3,452
Commitments and contingencies (Note 5)
Stockholders’ equity:
Preferred stock, $0.01 par value: 50,000 shares authorized, no shares issued and outstanding at March 31, 2017 and 2016	0	0
Common stock, $0.01 par value, 250,000 shares authorized, 44,816 shares and 44,134 shares issued and outstanding at March 31, 2017 and 2016, respectively	447	440
Additional paid-in capital	694,477	602,999
Accumulated deficit	(239,974)	(197,962)
Accumulated other comprehensive loss	(12,315)	(9,209)
Total stockholders’ equity	442,635	396,268
Total liabilities and stockholders’ equity	$ 802,967	$ 714,573

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Statement of Financial Position [Abstract]
Allowance for doubtful trade accounts receivable	$ 103	$ 315
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Common stock, shares issued (in shares)	44,816,000	44,134,000
Common stock, shares outstanding (in shares)	44,816,000	44,134,000

Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Software	$ 296,421	$ 258,793	$ 283,254
Services	354,097	336,333	324,289
Total revenues	650,518	595,126	607,543
Cost of revenues:
Software	3,045	2,385	2,442
Services	82,147	80,327	79,626
Total cost of revenues	85,192	82,712	82,068
Gross margin	565,326	512,414	525,475
Operating expenses:
Sales and marketing	387,975	352,669	335,980
Research and development	83,543	69,287	64,143
General and administrative	84,944	78,848	78,063
Depreciation and amortization	8,635	9,611	8,505
Total operating expenses	565,097	510,415	486,691
Income (loss) from operations	229	1,999	38,784
Interest expense	(957)	(933)	(665)
Interest income	1,163	862	773
Equity in loss of affiliate	(958)	(83)	0
Income (loss) before income taxes	(523)	1,845	38,892
Income tax expense (benefit)	(1,063)	1,709	13,242
Net income (loss)	$ 540	$ 136	$ 25,650
Net income per common share:
Basic (in dollars per share)	$ 0.01	$ 0.00	$ 0.56
Diluted (in dollars per share)	$ 0.01	$ 0.00	$ 0.54
Weighted average common shares outstanding:
Basic (in shares)	44,700	45,159	45,464
Diluted (in shares)	46,621	46,489	47,222

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 540	$ 136	$ 25,650
Other comprehensive loss:
Foreign currency translation adjustment	(3,106)	(1,705)	(6,587)
Comprehensive income (loss)	$ (2,566)	$ (1,569)	$ 19,063

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Beginning Balance (in shares) at Mar. 31, 2014		47,094
Beginning Balance at Mar. 31, 2014	$ 462,578	$ 471	$ 481,083	$ (18,059)	$ (917)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	60,663		60,663
Tax benefits relating to share-based payments	2,141		2,141
Share issuances related to stock-based compensation (in shares)		1,199
Share issuances related to stock-based compensation	17,690	$ 12	17,678
Repurchase of common stock (in shares)		(3,171)
Repurchase of common stock	(155,125)	$ (32)	(22,000)	(133,093)
Net income	25,650			25,650
Other comprehensive loss	(6,587)				(6,587)
Ending Balance (in shares) at Mar. 31, 2015		45,122
Ending Balance at Mar. 31, 2015	407,010	$ 451	539,565	(125,502)	(7,504)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	64,196		64,196
Tax benefits relating to share-based payments	3,265		3,265
Share issuances related to stock-based compensation (in shares)		1,575
Share issuances related to stock-based compensation	14,843	$ 15	14,828
Repurchase of common stock (in shares)		(2,563)
Repurchase of common stock	(91,477)	$ (26)	(18,855)	(72,596)
Net income	136			136
Other comprehensive loss	(1,705)				(1,705)
Ending Balance (in shares) at Mar. 31, 2016		44,134
Ending Balance at Mar. 31, 2016	396,268	$ 440	602,999	(197,962)	(9,209)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	73,928		73,928
Tax benefits relating to share-based payments	3,682		3,682
Share issuances related to stock-based compensation (in shares)		1,664
Share issuances related to stock-based compensation	21,321	$ 17	21,304
Repurchase of common stock (in shares)		(982)
Repurchase of common stock	(49,998)	$ (10)	(7,436)	(42,552)
Net income	540			540
Other comprehensive loss	(3,106)				(3,106)
Ending Balance (in shares) at Mar. 31, 2017		44,816
Ending Balance at Mar. 31, 2017	$ 442,635	$ 447	$ 694,477	$ (239,974)	$ (12,315)

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities
Net income	$ 540	$ 136	$ 25,650
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,232	11,179	9,046
Noncash stock-based compensation	73,928	64,196	60,663
Excess tax benefits from stock-based compensation	(6,242)	(6,664)	(5,057)
Deferred income taxes	(11,045)	(9,332)	4,072
Equity in loss of affiliate	958	83	0
Changes in operating assets and liabilities:
Trade accounts receivable	(21,493)	3,879	(6,581)
Other current assets and Other assets	(55)	2,843	(10,678)
Accounts payable	(190)	(454)	(267)
Accrued liabilities	15,088	1,972	13,221
Deferred revenue	37,988	16,317	35,818
Other liabilities	330	258	(2,040)
Net cash provided by operating activities	100,039	84,413	123,847
Cash flows from investing activities
Purchase of short-term investments	(96,306)	(99,071)	(68,933)
Proceeds from maturity of short-term investments	74,685	49,935	43,973
Purchase of equity method investment	0	(4,662)	0
Purchases for corporate campus headquarters	0	(2,111)	(59,297)
Purchase of property and equipment	(6,424)	(6,280)	(5,784)
Net cash used in investing activities	(28,045)	(62,189)	(90,041)
Cash flows from financing activities
Repurchase of common stock	(49,998)	(91,477)	(155,125)
Debt issuance costs	0	0	(1,262)
Proceeds from stock-based compensation plans	21,321	14,843	17,690
Excess tax benefits from stock-based compensation	6,242	6,664	5,057
Net cash used in financing activities	(22,435)	(69,970)	(133,640)
Effects of exchange rate — changes in cash	(8,175)	(1,820)	(20,226)
Net increase (decrease) in cash and cash equivalents	41,384	(49,566)	(120,060)
Cash and cash equivalents at beginning of year	288,107	337,673	457,733
Cash and cash equivalents at end of year	329,491	288,107	337,673
Supplemental disclosures of cash flow information
Interest paid	680	635	475
Income taxes paid, net	5,413	1,989	15,590
Purchases for corporate campus headquarters in accounts payable and accrued liabilities	$ 0	$ 0	$ 2,111

Nature of Business	12 Months Ended
Nature of Business	Mar. 31, 2017
Accounting Policies [Abstract]
Nature of Business	Nature of Business Commvault Systems, Inc. and its subsidiaries (“Commvault” or the “Company”) is a leading provider of data and information management software applications and related services. The Company develops, markets and sells a suite of software applications and services, primarily in North America, Europe, Australia and Asia, that provides its customers with data protection solutions supporting all major operating systems, applications, and databases on virtual and physical servers, NAS shares, cloud-based infrastructures, and mobile devices; management through a single console; multiple protection methods including backup and archive, snapshot management, replication, and content indexing for eDiscovery; efficient storage management using deduplication for disk, tape and cloud; integration with the industry's top storage arrays; complete virtual infrastructure management supporting multiple hypervisors; security capabilities to limit access to critical data; policy based data management; and an end-user experience that allows them to protect, find and recover their own data using common tools such as web browsers, Microsoft Outlook and File Explorer. The Company also provides its customers with a broad range of professional and customer support services.

Summary of Significant Accounting Policies

12 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Summary of Significant Accounting Policies

Basis of Presentation

The consolidated financial statements include the accounts of the Company. All intercompany transactions and balances have been eliminated.

Use of Estimates

The preparation of financial statements and related disclosures in conformity with U.S. GAAP requires management to make judgments and estimates that affect the amounts reported in the Company’s consolidated financial statements and the accompanying notes. The Company bases its estimates and judgments on historical experience and on various other assumptions that it believes are reasonable under the circumstances. The amounts of assets and liabilities reported in the Company’s balance sheets and the amounts of revenues and expenses reported for each of its periods presented are affected by estimates and assumptions, which are used for, but not limited to, the accounting for revenue recognition, allowance for doubtful accounts, income taxes and related reserves, stock-based compensation and accounting for research and development costs. Actual results could differ from those estimates.

Revenue Recognition

The Company derives revenues from two primary sources: software licenses and services. Services include customer support, consulting, assessment and design services, installation services and training. A typical sales arrangement includes both licenses and services.

For sales arrangements involving multiple elements, the Company recognizes revenue using the residual method. Under the residual method, the Company allocates and defers revenue for the undelivered elements based on fair value and recognizes the difference between the total arrangement fee and the amount deferred for the undelivered elements as revenue. The determination of fair value of the undelivered elements in multiple-element arrangements is based on the price charged when such elements are sold separately, which is commonly referred to as vendor-specific objective-evidence, or VSOE.

The Company’s software licenses typically provide for a perpetual right to use the Company’s software and are sold on a per terabyte basis, on a per-copy basis, as site licenses or as a solution set. Software licenses sold on a capacity basis provide the customer with unlimited licenses of specified software products based on a defined level of terabytes of data under management. Site licenses give the customer the additional right to deploy the software on a limited basis during a specified term. Solution sets are generally sold on a per unit basis such as per virtual machine for our virtual machine backup, recovery and cloud management solution set; per mailbox for our email archive solution set and per user for our endpoint data protection solution set.

The Company recognizes software revenue through direct sales channels upon receipt of a purchase order or other persuasive evidence and when all other basic revenue recognition criteria are met as described below. The Company recognizes software revenue through all indirect sales channels on a sell-through model. A sell-through model requires that the Company recognize revenue when the basic revenue recognition criteria are met as described below and these channels complete the sale of the Company’s software products to the end-user. Revenue from software licenses sold through an original equipment manufacturer partner is recognized upon the receipt of a royalty report or purchase order from that original equipment manufacturer partner.

Services revenue includes revenue from customer support and other professional services. Customer support includes software updates on a when-and-if-available basis, telephone support, integrated web-based support and bug fixes or patches. Customer support revenue is recognized ratably over the term of the customer support agreement, which is typically one year. To determine the price for the customer support element when sold separately, the Company primarily uses historical renewal rates. Historical renewal rates are supported by performing an analysis in which the Company segregates its customer support renewal contracts into different classes based on specific criteria including, but not limited to, the dollar amount of the software purchased, the level of customer support being provided and the distribution channel. As a result of this analysis, the Company has concluded that it has established VSOE for the different classes of customer support when the support is sold as part of a multiple-element sales arrangement. The Company’s determination of fair value for customer support has not changed for the periods presented.

The Company’s other professional services include consulting services, implementation and post-deployment services and education services. Other professional services provided by the Company are not mandatory and can also be performed by the customer or a third-party. In addition to a signed purchase order, the Company’s consulting services and implementation and post-deployment services are, in some cases, evidenced by a Statement of Work, which defines the specific scope of such services to be performed when sold and performed on a stand-alone basis or included in multiple-element sales arrangements. Revenues from consulting services and implementation and post-deployment services are based upon a daily or weekly rate and are recognized when the services are completed. Education services include courses taught by the Company’s instructors or third-party contractors either at one of the Company’s facilities or at the customer’s site. Education services fees are recognized as revenue after the course has been provided. Based on the Company’s analysis of such other professional services transactions sold on a stand-alone basis, the Company has concluded it has established VSOE for such other professional services when sold in connection with a multiple-element sales arrangement. The Company generally performs its other professional services within 90 days of entering into an agreement. The Company’s determination of fair value for other professional services has not changed for the periods presented.

The Company has analyzed all of the undelivered elements included in its multiple-element sales arrangements and determined that VSOE of fair value exists to allocate revenues to services. Accordingly, assuming all basic revenue recognition criteria are met, software revenue is recognized upon delivery of the software license using the residual method.

The Company considers the four basic revenue recognition criteria for each of the elements as follows:


•	Persuasive evidence of an arrangement with the customer exists. The Company’s customary practice is to require a purchase order and, in some cases, a written contract signed by both the customer and the Company, or other persuasive evidence that an arrangement exists prior to recognizing revenue related to an arrangement.

•

Delivery or performance has occurred. The Company’s software applications are either physically or electronically delivered to customers with standard transfer terms such as FOB shipping point. Software and/or software license keys for add-on orders or software updates are typically delivered in an electronic format. If products that are essential to the functionality of the delivered software in an arrangement have not been delivered, the Company does not consider delivery to have occurred. Services revenue is recognized when the services are completed, except for customer support, which is recognized ratably over the term of the customer support agreement, which is typically one year.

•

Vendor’s fee is fixed or determinable. The fee customers pay for software applications, customer support and other professional services is negotiated at the outset of a sales arrangement. The fees are therefore considered to be fixed or determinable at the inception of the arrangement. The Company evaluates instances when extended payment terms are granted to determine if revenue should be deferred until payment becomes due.

•

Collection is probable. Probability of collection is assessed on a customer-by-customer basis. Each new customer undergoes a credit review process to evaluate its financial position and ability to pay. If the Company determines from the outset of an arrangement that collection is not probable based upon the review process, revenue is recognized at the earlier of when cash is collected or when sufficient credit becomes available, assuming all of the other basic revenue recognition criteria are met.

The Company’s sales arrangements generally do not include acceptance clauses. However, if an arrangement does include an acceptance clause, revenue for such an arrangement is deferred and recognized upon acceptance. Acceptance occurs upon the earliest of receipt of a written customer acceptance, waiver of customer acceptance or expiration of the acceptance period.

Net Income per Common Share

Basic net income per common share is computed by dividing net income by the weighted average number of common shares during the period. Diluted net income per share is computed using the weighted average number of common shares and, if dilutive, potential common shares outstanding during the period. Potential common shares consist of the incremental common shares issuable upon the exercise of stock options, vesting of restricted stock units and shares to be purchased under the Employee Stock Purchase Plan. The dilutive effect of such potential common shares is reflected in diluted earnings per share by application of the treasury stock method.

The following table sets forth the computation of basic and diluted net income per common share:



	Year Ended March 31,
	2017		2016		2015
Net income	$	540	$	136	$	25,650
Basic net income per common share:
Basic weighted average shares outstanding	44,700		45,159		45,464
Basic net income per common share	$	0.01	$	0.00	$	0.56
Diluted net income per common share:
Basic weighted average shares outstanding	44,700		45,159		45,464
Dilutive effect of stock options, restricted stock units, and employee stock purchase plan	1,921		1,330		1,758
Diluted weighted average shares outstanding	46,621		46,489		47,222
Diluted net income per common share	$	0.01	$	0.00	$	0.54

The following table summarizes the potential outstanding common stock equivalents of the Company at the end of each period, which have been excluded from the computation of diluted net income per common share, as its effect is anti-dilutive.



	Year Ended March 31,
	2017	2016	2015
Stock options, restricted stock units, and shares under the employee stock purchase plan	2,492	4,183	3,136

Software Development Costs

Research and development expenditures are charged to operations as incurred. Based on the Company’s software development process, technological feasibility is established upon completion of a working model, which also requires certification and extensive testing. Costs incurred by the Company between completion of the working model and the point at which the product is ready for general release are immaterial.

Accounts Receivable and Allowance for Doubtful Accounts

Accounts receivable consist of amounts due to the Company from normal business activities. The Company maintains an allowance for estimated losses resulting from the inability of its customers to make required payments. The Company estimates uncollectible amounts based upon historical bad debts, evaluation of current customer receivable balances, age of customer receivable balances, the customer’s financial condition and current economic trends.

Accounting for Income Taxes

As part of the process of preparing financial statements, the Company is required to estimate its income taxes in each of the jurisdictions in which it operates. This process involves estimating actual current tax exposure, including assessing the risks associated with tax audits, and assessing temporary differences resulting from different treatment of items for tax and accounting purposes. These differences result in deferred tax assets and liabilities. As of March 31, 2017, the Company had net deferred tax assets of approximately $61,018, which were primarily related to stock-based compensation, deferred revenue, and tax credits. The Company assesses the likelihood that its deferred tax assets will be recovered from future taxable income, and to the extent that the Company believes recovery is not likely, the Company establishes a valuation allowance. As of March 31, 2017, the Company maintains a valuation allowance related to its deferred tax assets totaling $1,796 primarily related to the uncertainty of the Company’s ability to utilize New Jersey state research tax credits before expiration. The Company based its valuation allowance on its estimates of taxable income and the period over which its state research tax credits will be recoverable.

The calculation of the Company’s tax liabilities involves dealing with uncertainties in the application of complex tax regulations in each of its tax jurisdictions. The number of years with open tax audits varies depending on the tax jurisdiction. A number of years may lapse before a particular matter is audited and finally resolved. The Company applies the guidance issued to address the accounting for uncertain tax positions. This guidance clarifies the accounting for income taxes, by prescribing a minimum recognition threshold a tax position is required to meet before being recognized in the financial statements as well as provides guidance on derecognition, measurement, classification, interest and penalties, accounting in interim periods, disclosure and transition.

As of March 31, 2017, the Company had unrecognized tax benefits of $2,098, all of which, if recognized, would favorably affect the effective tax rate. In addition, the Company had accrued interest and penalties of $400 related to the unrecognized tax benefits. Interest and penalties, if any, related to unrecognized tax benefits are recorded in income tax expense. Components of the reserve are classified as either current or long-term in the Consolidated Balance Sheet based on when we expect each of the items to be settled. However, unrecognized tax benefits which are related to a Deferred Tax Asset recorded in the Consolidated Balance Sheet are presented as a reduction against the related Deferred Tax Asset.

Cash and Cash Equivalents

The Company considers all highly liquid investments purchased with maturities of three months or less at the date of purchase to be cash equivalents. As of March 31, 2017, the Company’s cash and cash equivalents balance consisted primarily of money market funds.

Short-term Investments

Short-term investments consist of investments with maturities of twelve months or less that do not meet the criteria to be cash equivalents. The company determines classification of the investment as trading, available-for-sale or held-to-maturity at the time of purchase and reevaluates classification whenever changes in circumstances indicate changes in classification may be necessary. The Company’s current short-term investments are classified as held-to-maturity. Held-to-maturity investments consist of securities that the Company has the intent and ability to retain until maturity. Held-to-maturity investments are initially recorded at cost and adjusted for the amortization of discounts from the date of purchase through maturity. Income related to investments is recorded as interest income in the Consolidated Statement of Income. Cash inflows and outflows related to the sale, maturity and purchase of investments are classified as investing activities in the Company’s Consolidated Statements of Cash Flows.

Concentration of Credit Risk

The Company grants credit to customers in a wide variety of industries worldwide and generally does not require collateral. Credit losses relating to these customers have been minimal.

Sales through the Company’s distribution agreement with Arrow Enterprise Computing Solutions, Inc. (“Arrow”) totaled approximately 36%, 38% and 36% of total revenues for the years ended March 31, 2017, 2016 and 2015, respectively. Arrow accounted for approximately 40% and 43% of total accounts receivable as of March 31, 2017 and 2016, respectively.

Sales through the Company’s distribution agreement with Avnet Technology Solutions ("Avnet") totaled 10% of total revenues for the year ended March 31, 2017. Avnet accounted for approximately 12% of total accounts receivable as of March 31, 2017.

Fair Value of Financial Instruments

The carrying amounts of the Company’s cash and cash equivalents, accounts receivable and accounts payable approximate their fair values due to the short-term maturity of these instruments. As of March 31, 2017 and 2016, the Company’s short-term investments balance consisted of U.S. Treasury Bills.

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for such asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value should maximize the use of observable inputs and minimize the use of unobservable inputs. To measure fair value, the Company uses the following fair value hierarchy based on three levels of inputs, of which the first two are considered observable and the last unobservable:

Level 1 — Quoted prices in active markets for identical assets or liabilities.

Level 2 — Inputs other than Level 1 that are observable for the asset or liability, either directly or indirectly, such as quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; or other inputs that are observable or can be corroborated by observable market data by correlation or other means.

Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

The following table summarizes the composition of the Company’s financial assets measured at fair value on a recurring basis at March 31, 2017 and March 31, 2016:



March 31, 2017	Level 1		Level 2		Level 3	Total
Cash equivalents	$	70,190	—		—	$	70,190
Short-term investments	—		$	120,989	—	$	120,989



March 31, 2016	Level 1		Level 2		Level 3	Total
Cash equivalents	$	95,735	—		—	$	95,735
Short-term investments	—		$	99,215	—	$	99,215

Property and Equipment

Property and equipment are stated at cost, less accumulated depreciation and amortization. Land is not depreciated. The Company provides for depreciation on a straight-line basis over the estimated useful lives of the assets. The depreciable assets that comprise the Company's owned headquarters classified as Buildings are being depreciated over lives ranging from ten to sixty years. Computer and related equipment is generally depreciated over eighteen months to three years and furniture and fixtures are generally depreciated over three to twelve years. Leasehold improvements are amortized over the shorter of the useful life of the improvement or the term of the related lease. Expenditures for routine maintenance and repairs are charged against operations. Major replacements, improvements and additions are capitalized.

Asset Retirement Obligation

A liability for the fair value of an asset retirement obligation and corresponding increase to the carrying value of the related leasehold improvements are recorded at the time leasehold improvements are acquired. The Company maintains certain office space for which the lease agreement requires that the Company return the office space to its original condition upon vacating the premises. Accordingly, the balance of the asset retirement obligation was $1,204 as of March 31, 2017 and $1,071 as of March 31, 2016.

Long-Lived Assets

The Company reviews its long-lived assets for impairment whenever events or changes in circumstances indicate that the carrying amount of the assets may not be fully recoverable. To determine the recoverability of its long-lived assets, the Company evaluates the estimated future undiscounted cash flows that are directly associated with, and that are expected to arise as a direct result of, the use and eventual disposition of the long-lived asset. If the estimated future undiscounted cash flows demonstrate that recoverability is not probable, an impairment loss would be recognized. An impairment loss would be calculated based on the excess carrying amount of the long-lived asset over the long-lived asset’s fair value. The fair value would be determined based on valuation techniques such as a comparison to fair values of similar assets. There were no impairment charges recognized during the years ended March 31, 2017, 2016 and 2015.

Equity Method Investment

In fiscal 2016, the Company acquired a 34% ownership in Laitek, Inc. ("Laitek"). The Company also has an option to acquire the remaining ownership of Laitek at a fixed price until December 2017. Laitek develops solutions for acquiring, processing and presenting scientific and medical image information. The Company uses the equity method to account for its investment. In the event that management identifies an other than temporary decline in the estimated fair value of an equity method investment to an amount below its carrying value, such investment is written down to its estimated fair value. The Company also has development and original equipment manufacturing agreements with Laitek to jointly develop healthcare related software products. Certain employees of Laitek were also provided restricted stock units in exchange for consultative services provided to the Company. The awards are included in the information in Note 8.

Deferred Revenue

Deferred revenues represent amounts collected from, or invoiced to, customers in excess of revenues recognized. This results primarily from the billing of annual customer support agreements, and billings for other professional services fees that have not yet been performed by the Company and receipt of license fees that are deferred due to one or more of the revenue recognition criteria not being met. The value of deferred revenues will increase or decrease based on the timing of invoices and recognition of revenue. The Company expenses internal direct and incremental costs related to contract acquisition and origination as incurred.

Deferred revenue consists of the following:



	March 31,
	2017		2016
Current:
Deferred software revenue	$	2,793	$	1,578
Deferred services revenue	203,984		193,399
	206,777		194,977
Non-current:
Deferred services revenue	70,803		49,889
Total Deferred Revenue	$	277,580	$	244,866

Accounting for Stock-Based Compensation

The Company utilizes the Black-Scholes pricing model to determine the fair value of non-qualified stock options on the dates of grant. Restricted stock units without a market condition are measured based on the fair market values of the underlying stock on the date of grant. The Company recognizes stock-based compensation using the straight-line method for all stock awards that don't include a market or performance condition.

The Company has granted certain executive officers and other senior employees performance stock units that vest over three years based upon the Company's stock performance versus the Russell 3000 Index. The performance of the stock versus the index is a market condition performance criteria so the Company used a Monte Carlo simulation model to determine the fair value of the restricted stock units. Expense related to stock based compensation that includes market or performance conditions is recognized using the accelerated method.

Share Repurchases

The Company considers all shares repurchased as canceled shares restored to the status of authorized but unissued shares on the trade date. The aggregate purchase price of the shares of the Company’s common stock repurchased is reflected as a reduction to Stockholders’ Equity. The Company accounts for shares repurchased as an adjustment to common stock (at par value) with the excess repurchase price allocated between Additional Paid-in Capital and Accumulated Deficit.

Sales Tax

The Company records revenue net of sales tax.

Advertising Costs

The Company expenses advertising costs as incurred. Advertising expenses were $7,816, $5,083, and $5,401 for the years ended March 31, 2017, 2016 and 2015, respectively.

Shipping and Handling Costs

Shipping and handling costs are included in cost of revenues for all periods presented.

Foreign Currency Translation

The functional currencies of the Company’s foreign operations are deemed to be the local country’s currency. Assets and liabilities of the Company’s international subsidiaries are translated at their respective period-end exchange rates, and revenues and expenses are translated at average currency exchange rates for the period. The resulting balance sheet translation adjustments are included in Other Comprehensive Loss and are reflected as a separate component of Stockholders’ Equity.

Foreign currency transaction gains and losses are recorded in “General and administrative expenses” in the Consolidated Statements of Income. The Company recognized net foreign currency transaction gains of $644, $195 and $127 in the years ended March 31, 2017, 2016, and 2015, respectively. The net foreign currency transaction gains recorded in “General and administrative expenses” include settlement gains and losses on forward contracts disclosed below.

To date, the Company has selectively hedged its exposure to foreign currency transaction gains and losses on the balance sheet through the use of forward contracts, which were not designated as hedging instruments. The duration of forward contracts utilized for hedging the Company’s balance sheet exposure is generally one month to three months. As of March 31, 2017 and March 31, 2016, the Company did not have any forward contracts outstanding. The Company recorded net realized gains in general and administrative expenses of $15 in fiscal 2017, losses of $53 in fiscal 2016 and gains of $33 in fiscal 2015 related to the settlement of a forward exchange contracts. In the future, the Company may enter into additional foreign currency-based hedging contracts to reduce its exposure to significant fluctuations in currency exchange rates on the balance sheet.

Comprehensive Income (Loss)

Comprehensive income (loss) is defined to include all changes in equity, except those resulting from investments by stockholders and distribution to stockholders.

Recently Issued Accounting Standards

Revenue Recognition

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update ("ASU") No. 2014-09, "Revenue from Contracts with Customers (Topic 606)." This standard replaces existing revenue recognition rules with a comprehensive revenue measurement and recognition standard and expanded disclosure requirements. The ASU also includes guidance regarding the accounting for contract acquisition costs, which includes sales commissions. The Company has early adopted the new standard as of April 1, 2017 using the full retrospective method which will require each prior reporting period presented to be recast in future issuances of the Company’s financial statements.

Over the last two years the Company has worked to assess all potential impacts of the new standard and prepare for adoption. As part of this process the Company closely monitored FASB activity, as well as working with non-authoritative groups to conclude on specific interpretative issues. As part of the adoption process, findings and progress of the project were regularly reported to senior management and the Audit Committee. The most significant impacts of the new standard upon adoption relate to the accounting for commissions costs and the timing of revenue recognition of certain perpetual software license arrangements. Specifically, under the new standard:


•	A portion of sales commissions cost will be recorded as an asset and recognized as an operating expense over the time period that the Company expects to recover the costs. Currently, the Company expenses commissions cost as incurred.

•

The software revenue associated with certain sales of perpetual licenses is recognized sooner due to the updated revenue recognition guidance which amended certain policies previously adopted by the Company. These policies related primarily to the requirement to obtain certain documentation from an end user in an indirect transaction, the elimination of the requirement to establish vendor specific objective evidence of fair value in a multiple element arrangement, and the previous practice of recognizing revenue on a cash basis in certain geographies.

Select recast unaudited financial statement information, which reflect the adoption of the ASU is below. The Company’s historical net cash flows are not impacted by this accounting change.



	Year Ended March 31, 2016
	Unaudited
	As Reported			Adjustments			Recast for Adoption of ASC 606
Revenues:
Software	$	258,793		$	(702	)	$	258,091
Services	336,333			(657		)	335,676
Total revenues	595,126			(1,359		)	593,767
Total cost of revenues	82,712			—			82,712
Gross margin	512,414			(1,359		)	511,055
Total operating expenses	510,415			(3,470		)	506,945
Income from operations	1,999			2,111			4,110
Interest expense	(933		)	—			(933		)
Interest income	862			—			862
Equity in loss of affiliate	(83		)	—			(83		)
Income before income taxes	1,845			2,111			3,956
Income tax expense	1,709			527			2,236
Net income	$	136		$	1,584		$	1,720



	Year Ended March 31, 2017
	Unaudited
	As Reported			Adjustments			Recast for Adoption of ASC 606
Revenues:
Software	$	296,421		$	(5,753	)	$	290,668
Services	354,097			240			354,337
Total revenues	650,518			(5,513		)	645,005
Total cost of revenues	85,192			—			85,192
Gross margin	565,326			(5,513		)	559,813
Total operating expenses	565,097			(4,042		)	561,055
Income (loss) from operations	229			(1,471		)	(1,242		)
Interest expense	(957		)	—			(957		)
Interest income	1,163			—			1,163
Equity in loss of affiliate	(958		)	—			(958		)
Loss before income taxes	(523		)	(1,471		)	(1,994		)
Income tax benefit	(1,063		)	(423		)	(1,486		)
Net income (loss)	$	540		$	(1,048	)	$	(508	)



	March 31, 2017
	Unaudited Balance Sheet Data
	As Reported			Adjustments			Recast for Adoption of ASC 606
Current assets:
Trade accounts receivable	$	132,761		$	1,789		$	134,550
Unbilled receivables	$	—		$	1,211		$	1,211
Total current assets	$	598,736		$	3,000		$	601,736
Deferred commissions	$	—		$	30,378		$	30,378
Deferred tax assets, net	$	61,018		$	(10,790	)	$	50,228
Total assets	$	802,967		$	22,588		$	825,555
Current Liabilities:
Deferred revenue	$	206,777		$	(2,001	)	$	204,776
Total current liabilities	$	285,595		$	(2,001	)	$	283,594
Other liabilities	$	3,934		$	292		$	4,226
Accumulated deficit	$	(239,974	)	$	24,297		$	(215,677	)
Total stockholders’ equity	$	442,635		$	24,297		$	466,932
Total liabilities and stockholders’ equity	$	802,967		$	22,588		$	825,555

Stock-based Compensation

In March 2016, the FASB issued ASU 2016-09, "Improvements to Employee Share-Based Payment Accounting," which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. The Company will adopt this standard in the first quarter of fiscal 2018. The Company is in the process of evaluating the transition and disclosure requirements of the standard.

Statement of Cash Flows

In November 2016, the FASB issued ASU No. 2016-18, Statement of Cash Flows, Restricted Cash (Topic 230), which requires the inclusion of restricted cash with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the statement of cash flows. The guidance is effective for the fiscal 2019. Early adoption is permitted. The amendments will be applied using a retrospective transition method to each period presented. The Company is in the process of evaluating the transition and disclosure requirements of the standard and anticipates the adoption will not have a significant impact on the consolidated statements of cash flows.

Leases

In February 2016, the FASB issued ASU 2016-02 “Leases (Topic 842)” (“ASU 2016-02”). Under ASU 2016-02, a lessee will recognize in the balance sheet a liability to make lease payments (the lease liability) and a right-to-use asset representing its right to use the underlying asset for the lease term. The amendments of this ASU are effective for the Company's fiscal 2020, with early adoption permitted. A company will be required to recognize and measure leases at the beginning of the earliest period presented using a modified retrospective approach. The Company is currently assessing the impact the adoption of ASU 2016-02 will have on the financial statements.

There have been no other accounting pronouncements issued but not yet adopted by the Company which are expected to have a material impact on the Company’s financial position, results of operations or cash flows.

Property and Equipment

12 Months Ended

Mar. 31, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and equipment consist of the following:



	March 31,
	2017			2016
Land	$	9,445		$	9,445
Buildings	103,244			103,193
Computers, servers and other equipment	35,274			33,120
Furniture and fixtures	14,912			14,458
Leasehold improvements	7,040			6,948
Purchased software	1,335			1,279
Construction in process	1,147			165
	172,397			168,608
Less: Accumulated depreciation and amortization	(40,078		)	(32,704		)
	$	132,319		$	135,904

The Company recorded depreciation and amortization expense of $9,980, $10,927, and $8,856 for the years ended March 31, 2017, 2016 and 2015, respectively.

Accrued Liabilities

12 Months Ended

Mar. 31, 2017

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued liabilities consist of the following:



	March 31,
	2017		2016
Compensation and related payroll taxes	$	45,149	$	36,789
Other	33,552		32,889
	$	78,701	$	69,678

Commitments and Contingencies

12 Months Ended

Mar. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

Leases

The Company leases various office facilities under non-cancelable leases, which expire on various dates through April 2022. Future minimum lease payments under all operating leases at March 31, 2017 are as follows:



Year Ending March 31,
2018	$	9,504
2019	7,588
2020	6,391
2021	5,238
2022 and thereafter	6,002
	$	34,723

Rent expenses were $10,377, $9,856, and $10,845 for the years ended March 31, 2017, 2016 and 2015, respectively.

Rent expense is calculated by amortizing total rental payments (net of any rental abatements, allowances and other rental concessions), on a straight-line basis, over the lease term. Accordingly, rent expense charged to operations differs from rent paid resulting in the Company recording deferred rent.

Purchase Commitments

The Company, in the normal course of business, enters into various purchase commitments for goods or services. Total non-cancellable purchase commitments as of March 31, 2017 are approximately $11,051 for fiscal 2018, $6,615 for fiscal 2019, $3,373 for fiscal 2020 and $221 for fiscal 2021, totaling $21,260 for all periods through fiscal 2021. These purchase commitments relate primarily to marketing and IT services.

The Company has certain software royalty commitments associated with the shipment and licensing of certain products. Royalty expense is generally based on a fixed cost per unit shipped or a fixed fee for unlimited units shipped over a designated period. Royalty expense, included in cost of software revenues, was $2,646 in fiscal 2017, $1,933 in fiscal 2016 and $1,768 in fiscal 2015.

Warranties and Indemnifications

The Company offers a 90-day limited product warranty for its software. To date, costs related to this product warranty have not been material.

The Company provides certain provisions within its software licensing agreements to indemnify its customers from any claim, suit or proceeding arising from alleged or actual intellectual property infringement. These provisions continue in perpetuity, along with the Company’s software licensing agreements. The Company has never incurred a liability relating to one of these indemnification provisions, and management believes that the likelihood of any future payout relating to these provisions is remote. Therefore, the Company has not recorded a liability during any period for these indemnification provisions.

Legal Proceedings

In the normal course of its business, the Company may be involved in various claims, negotiations and legal actions. As of March 31, 2017, the Company is not aware of any asserted or unasserted claims, negotiations and legal actions for which a loss is considered reasonably possible of occurring and would require disclosure under the guidance.

On September 10, 2014, a purported class action complaint was filed in the United States District Court for the District of New Jersey against the Company, its Chief Executive Officer and its Chief Financial Officer. The case is captioned In re Commvault Systems, Inc. Securities Litigation (Master File No. 3:14-cv-05628-MAS-LHG). The suit alleges that the Company made materially false and misleading statements, or failed to disclose material facts, regarding the Company's financial results, business, operations and prospects in violation of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 and Rule 10b-5 promulgated thereunder. The suit asserts claims covering an alleged class period from May 7, 2013 through April 24, 2014. It is purportedly brought on behalf of purchasers of the Company's common stock during that period, and seeks compensatory damages, costs and expenses, as well as equitable or other relief. Lead plaintiff, the Arkansas Teachers Retirement System, was appointed on January 12, 2015, and on March 18, 2015, an amended complaint was filed by the plaintiffs. On December 17, 2015, the defendant’s motion to dismiss the case was granted and the case dismissed; however, the plaintiffs were permitted to re-file their claim, which they did on February 5, 2016. Defendants filed another motion to dismiss on April 5, 2016, which remains was denied by the court on September 30, 2016. Discovery has commenced in this action and is ongoing. Due to the inherent uncertainties of litigation, the Company cannot accurately predict the ultimate outcome of this matter. The Company are unable at this time to determine whether the outcome of the litigation will have a material impact on our results of operations, financial condition or cash flows. As of March 31, 2017, the Company has not recorded an accrual for this matter as it has concluded the probability of a loss is remote.

On April 12, 2017, a shareholder derivative complaint was filed in the United States District Court for the District of New Jersey against the Company (nominally), certain of its executive officers, and certain of its current and former members of the board of directors. The complaint is entitled Murashko v. Hammer, et al. (Civ. No. 3:17-cv-02533-PGS-TJB). The action alleges that certain of the Company’s executive officers and board members breached their fiduciary duties to the Company by causing, or allowing, the Company to manipulate its financial results and conceal the state of its business prospects. The suit also alleges that through these breaches, the Company’s executive officers and board members unjustly enriched themselves at the expense of the Company. The suit asserts factual allegations similar to the allegations made in In re Commvault Systems, Inc. Securities Litigation (Master File No. 3:14-cv-05628-PGS-LHG), a securities litigation also pending in the United States District Court for the District of New Jersey. The allegations asserted in the shareholder derivate action purport to cover a period from 2013 through the present. As a derivative action, the complaint is brought nominally on behalf of the Company, and seeks compensatory damages, restitution, costs and expenses, as well as equitable or other relief. Due to the inherent uncertainties of litigation, the Company cannot accurately predict the ultimate outcome of this matter. The Company is unable at this time to determine whether the outcome of the litigation will have a material impact on its results of operations, financial condition or cash flows. As of March 31, 2017, the Company has not recorded an accrual for this matter as it has concluded the probability of a loss is remote.

On February 27, 2017, Realtime Data LLC d/b/a/ IXO (“Realtime”), a non-practicing entity, sued the Company and Spectra Logic Corporation in the Eastern District of Texas for alleged infringement of four patents: U.S. Patent Nos. 9,054,728, 7,415,530, 9,116,908, and 8,717,204. Realtime has sued numerous other companies for infringement of these and other patents. Realtime seeks monetary damages and an injunction. The Company has not yet answered the complaint. Due to the inherent uncertainties of litigation, the Company cannot accurately predict the ultimate outcome of this matter. The Company is unable at this time to determine whether the outcome of the litigation will have a material impact on its results of operations, financial condition or cash flows. The Company intends to defend itself vigorously. As of March 31, 2017, the Company has not recorded an accrual for this matter as it has concluded the probability of a loss is remote.

Revolving Credit Facility	12 Months Ended
Revolving Credit Facility	Mar. 31, 2017
Debt Disclosure [Abstract]
Revolving Credit Facility	Revolving Credit Facility On June 30, 2014, the Company entered into a five-year $250,000 revolving credit facility (the “Credit Facility”). The Credit Facility is available for share repurchases, general corporate purposes, and letters of credit. The Credit Facility contains financial maintenance covenants including a leverage ratio and interest coverage ratio. The Credit Facility also contains certain customary events of default which would permit the lenders to, among other things, declare all loans then outstanding to be immediately due and payable if such default is not cured within applicable grace periods. The Credit Facility also limits the Company's ability to incur certain additional indebtedness, create or permit liens on assets, make acquisitions, make investments, loans or advances, sell or transfer assets, pay dividends or distributions, and engage in certain transactions with foreign affiliates. Outstanding borrowings under the Credit Facility accrue interest at an annual rate equal to London Interbank Offered Rate plus 1.50% subject to increases based on the Company's actual leverage. The unused balance on the Credit Facility is also subject to a 0.25% annual interest charge subject to increases based on the Company's actual leverage. As of March 31, 2017, there were no borrowings under the Credit Facility and the Company was in compliance with all covenants. The Company has deferred the expense related to debt issuance costs, which are classified as Other Assets, and will amortize the costs into interest expense over the term of the Credit Facility. Unamortized amounts at March 31, 2017 were $568 and $820 as of March 31, 2016. The amortization of debt issuance costs was $252 for years ended March 31, 2017 and 2016. Amortization of debt issuances costs is included in Interest expense.

Capitalization	12 Months Ended
Capitalization	Mar. 31, 2017
Equity [Abstract]
Capitalization	Capitalization As of March 31, 2017 and 2016, the Company had 250,000 shares of common stock and 50,000 shares of preferred stock authorized. As of March 31, 2017 and 2016 there were no shares of preferred stock outstanding. On November 13, 2008, the Board of Directors of the Company adopted a Rights Plan and declared a dividend distribution of one Right for each outstanding share of common stock to shareholders of record on November 24, 2008. Each Right, when exercisable, entitles the registered holder to purchase one one-thousandth of a share of Series A Junior Participating Preferred Stock, par value $0.01 per share, at a purchase price of eighty dollars per one one thousandth of a share, subject to adjustment. Of the 50,000 shares of preferred stock authorized under the Company’s certificate of incorporation, 150 have been designated as Series A Junior Participating Preferred. The Rights will become exercisable following the tenth business day after (i) a person or group announces the acquisition of 15% or more of the Company’s common stock or (ii) commencement of a tender or exchange offer, the consummation of which would result in ownership by the person or group of 15% or more of the Company’s common stock. The Company is also entitled to redeem the Rights at $0.001 per right under certain circumstances. The Rights expire on November 14, 2018, if not exercised or redeemed. Common Stock The Company had 44,816 and 44,134 shares of common stock, par value $0.01, outstanding at March 31, 2017 and March 31, 2016, respectively. During fiscal 2017, the Company repurchased $49,998 of common stock, or 982 shares, under its share repurchase program. As of March 31, 2017, $125,000 remained in the current stock repurchase authorization which expires on March 31, 2018. Shares Reserved for Issuance The Company has reserved 4,478 shares in connection with its Stock Plans discussed in Note 8 at March 31, 2017.

Stock Plans

12 Months Ended

Mar. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock Plans

As of March 31, 2017, the Company maintains one stock incentive plan for purposes of granting awards, the Omnibus Incentive Plan (the “2016 Incentive Plan”). The Company has one additional plan, the 2006 Long-Term Stock Incentive Plan (the “LTIP”), with outstanding options and awards but cannot be used for future grants.

The 2016 Incentive Plan permits the grant of incentive stock options, non-qualified stock options, restricted stock awards, restricted stock units, stock appreciation rights, performance stock awards and stock unit awards based on, or related to, shares of the Company’s common stock. As of March 31, 2017, approximately 2,078 shares were available for future issuance under the 2016 Incentive Plan.

As of March 31, 2017, the Company has granted non-qualified stock options, restricted stock units and performance stock awards under its stock incentive plans. Historically, equity awards granted by the Company under its stock incentive plans generally vest quarterly over a four-year period, except that the shares that would otherwise vest quarterly over the first twelve months do not vest until the first anniversary of the grant. Beginning in October of 2015, the Company began granting its equity awards with a three-year vest period, and retained the practice that shares that would otherwise vest quarterly over the first twelve months do not vest until the first anniversary of the grant. However, from time to time the company grants equity awards that vest between one and three years. The Company anticipates that future grants under its stock incentive plans will be restricted stock units and performance stock awards and does not anticipate that it will grant stock options.

As of March 31, 2017, there was approximately $95,364 of unrecognized stock-based compensation expense related to all of the Company's employee stock plans, net of estimated forfeitures, that is expected to be recognized over a weighted average period of 1.51 years. To the extent the actual forfeiture rate is different from what the Company has anticipated, stock-based compensation related to these awards will be different from the Company’s expectations.

The Company estimated the fair value of stock options granted using the Black-Scholes formula. The Company’s calculation of expected term includes a combination of actual exercise data and an assumption on when the remaining outstanding options with similar characteristics would be exercised based on the Company’s historical data. In determining expected life, the Company separates employees into groups that have historically exhibited similar behavior with regard to option exercises. Expected volatility is calculated based on a blended approach that included the implied volatility of the Company’s traded options with a remaining maturity greater than six months and the historical realized volatility of the Company’s common stock. The risk-free interest rate is determined by reference to U.S. Treasury yield curve rates with a remaining term that is approximately the expected life assumed at the date of grant. Forfeitures are estimated based on the Company’s historical analysis of actual stock option forfeitures.

The assumptions used in the Black-Scholes option-pricing model are as follows:



	Year Ended March 31,
	2016	2015
Dividend yield	None	None
Expected volatility	39% - 43%	41% - 47%
Weighted average expected volatility	41%	46%
Risk-free interest rates	1.29% - 1.75%	1.22% - 2.18%
Weighted average expected life (in years)	4.6	5.7

The following summarizes the activity for the Company’s stock incentive plans from March 31, 2014 to March 31, 2017:



Options	Number of Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at March 31, 2014	6,388		$	39.03
Options granted	1,155		46.08
Options exercised	(504	)	19.44
Options forfeited	(159	)	65.93
Options expired	(27	)	68.84
Outstanding at March 31, 2015	6,853		40.91
Options granted	148		41.84
Options exercised	(764	)	8.80
Options forfeited	(172	)	59.79
Options expired	(126	)	61.81
Outstanding at March 31, 2016	5,939		44.07
Options granted	—		—
Options exercised	(446	)	28.44
Options forfeited	(77	)	51.55
Options expired	(116	)	68.98
Outstanding at March 31, 2017	5,300		$	44.74	4.81	$	70,743
Vested or expected to vest at March 31, 2017	5,287		$	44.73	4.80	$	70,667
Exercisable at March 31, 2017	4,686		$	43.42	4.46	$	68,022

The weighted average fair value of stock options granted was $15.20 per share and $20.16 per share during the years ended March 31, 2016, and 2015, respectively. The total intrinsic value of options exercised was $9,896, $23,391, and $15,069 in the years ended March 31, 2017, 2016 and 2015, respectively. The Company’s policy is to issue new shares upon exercise of options as the Company does not hold shares in treasury.

The following table summarizes information on stock options outstanding at March 31, 2017:



Range of Exercise Prices	Options Outstanding at March 31, 2017	Weighted-Average			Options Exercisable at March 31, 2017	Weighted- Average Exercise Price
Range of Exercise Prices	Options Outstanding at March 31, 2017	Remaining Contractual Life	Exercise Price		Options Exercisable at March 31, 2017	Weighted- Average Exercise Price
$11.12 - 13.81	864	1.36	$	12.36	864	$	12.36
15.88 - 23.88	395	2.13	20.79		395	20.79
26.83	533	3.54	26.83		533	26.83
27.02 - 41.31	144	5.99	36.02		93	34.51
41.55	670	4.54	41.55		670	41.55
43.30 - 45.39	65	7.96	44.47		32	44.40
45.44	689	7.54	45.44		363	45.44
46.59 - 55.58	250	6.76	49.89		192	50.31
56.57	650	5.53	56.57		650	56.57
58.25 - 87.20	1,040	6.42	84.11		894	83.80
$11.12 - 87.20	5,300	4.81	$	44.74	4,686	$	43.42

Restricted stock unit activity is as follows:



Non-Vested Restricted Stock Units	Number of Awards		Weighted Average Grant Date Fair Value
Non-vested as of March 31, 2014	1,202		$	65.63
Granted	815		46.62
Vested	(491	)	59.22
Forfeited	(114	)	63.70
Non-vested as of March 31, 2015	1,412		56.82
Granted	1,543		37.27
Vested	(547	)	38.38
Forfeited	(196	)	49.24
Non-vested as of March 31, 2016	2,212		43.43
Granted	1,333		50.66
Vested	(975	)	51.35
Forfeited	(174	)	43.56
Non-vested as of March 31, 2017	2,396		$	45.53

The total fair value of the restricted stock units that vested during the years ended March 31, 2017, 2016 and 2015 was $50,051, $20,981 and $24,592, respectively.

The following table presents the stock-based compensation expense included in cost of services revenue, sales and marketing, research and development and general and administrative expenses for the years ended March 31, 2017, 2016 and 2015.



	Year Ended March 31,
	2017		2016		2015
Cost of services revenue	$	3,925	$	3,106	$	2,930
Sales and marketing	34,005		28,557		26,853
Research and development	7,335		6,722		5,908
General and administrative	28,663		25,811		24,972
Stock-based compensation expense	$	73,928	$	64,196	$	60,663

The Company recognized a tax benefit related to stock-based compensation of $23,473 in the year ended March 31, 2017, $17,010 in the year ended March 31, 2016 and $18,570 in the year ended March 31, 2015.

Performance Based Awards

In fiscal 2017, the Company granted 115 performance restricted stock units ("PSU") to certain executives. Vesting of these awards is contingent upon i) the Company meeting certain company-wide revenue and non-GAAP performance goals (performance-based) in fiscal 2017 and ii) the Company's customary service periods. The awards vest in three annual tranches and have a maximum potential to vest at 200% (230 shares) based on actual fiscal 2017 performance. The related stock-based compensation expense is determined based on the value of the underlying shares on the date of grant and is recognized over the vesting term using the accelerated method. During each financial period, management estimates the probable number of PSU’s that would vest until the ultimate achievement of the performance goals is known. The Company currently estimates that the PSU's will vest at 132%. The awards are included in the restricted stock units table.

Awards with a Market Condition

In fiscal 2017, the Company granted 123 market performance stock units to certain executives. The vesting of these awards is contingent upon the Company meeting certain total shareholder return (TSR) levels as compared to a market index over the next three years. The awards vest in three annual tranches and have a maximum potential to vest at 200% (246 shares) based on TSR performance. The related stock-based compensation expense is determined based on the estimated fair value of the underlying shares on the date of grant and is recognized using the accelerated method over the vesting term. The estimated fair value was calculated using a Monte Carlo simulation model. The weighted average fair value of the awards granted during the year was $57.28. The awards are included in the restricted stock unit table above.

Employee Stock Purchase Plan

The Employee Stock Purchase Plan (the “Purchase Plan”) is a shareholder approved plan under which substantially all employees may purchase the Company’s common stock through payroll deductions at a price equal to 85% of the lower of the fair market values of the stock as of the beginning or the end of six-month offering periods. An employee’s payroll deductions under the Purchase Plan are limited to 10% of the employee’s salary and employees may not purchase more than $25 of stock during any calendar year. Employees purchased 243 shares in exchange for $8,634 of proceeds in fiscal 2017 and 263 shares in exchange for $8,116 of proceeds in fiscal 2016. The Purchase Plan is considered compensatory and the fair value of the discount and look back provision are estimated using the Black-Scholes formula and recognized over the six month withholding period prior to purchase. The total expense associated with the Purchase Plan for fiscal 2017, 2016 and 2015 was $2,620, $2,418 and $2,960, respectively. As of March 31, 2017, there was approximately $1,014 of unrecognized cost related to the current purchase period of our Employee Stock Purchase Plan.

- Definition

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

+ References + Details

Income Taxes

12 Months Ended

Mar. 31, 2017

Income Tax Disclosure [Abstract]

Income Taxes

The components of income (loss) before income taxes were as follows:



	Year Ended March 31,
	2017			2016			2015
Domestic	$	(7,698	)	$	(6,869	)	$	28,048
Foreign	7,175			8,714			10,844
	$	(523	)	$	1,845		$	38,892

The components of income tax expense (benefit) were as follows:



	Year Ended March 31,
	2017			2016			2015
Current:
Federal	$	6,138		$	4,983		$	1,777
State	(977		)	1,076			2,533
Foreign	4,818			4,982			4,791
Deferred:
Federal	(11,144		)	(9,171		)	4,237
State	(56		)	324			(24		)
Foreign	158			(485		)	(72		)
	$	(1,063	)	$	1,709		$	13,242

A reconciliation of the statutory tax rates and the effective tax rates for the years ended March 31, 2017, 2016 and 2015 are as follows:



	Year Ended March 31,
	2017		2016		2015
Statutory federal income tax expense (benefit) rate	(35.0	)%	35.0	%	35.0	%
State and local income tax expense, net of federal income tax effect	11.2	%	11.2	%	3.0	%
Impact of limit on executive compensation	—	%	—	%	3.2	%
Foreign earnings taxed at different rates	501.2	%	67.9	%	1.0	%
Domestic permanent differences	368.4	%	116.8	%	4.1	%
Foreign tax credits	(258.2	)%	(54.1	)%	(2.8	)%
Research credits	(622.2	)%	(141.2	)%	(4.9	)%
Tax reserves	15.6	%	8.7	%	(5.3	)%
Valuation allowance	(121.4	)%	50.1	%	—	%
Statutory tax rate changes	60.8	%	(20.1	)%	—	%
Other differences, net	(123.7	)%	18.3	%	0.7	%
Effective income tax expense (benefit)	(203.3	)%	92.6	%	34.0	%

Net deferred tax assets arise due to the recognition of income and expense items for tax purposes, which differ from those used for financial statement purposes. The Company assesses the likelihood that its deferred tax assets will be recovered from future taxable income, and to the extent that the Company believes recovery is not likely, the Company establishes a valuation allowance. The significant components of the Company’s deferred tax assets are as follows:



	March 31,
	2017			2016
Deferred tax assets:
Stock-based compensation	$	45,867		$	40,033
Deferred revenue	11,810			12,496
Tax credits	12,810			6,970
Accrued expenses	1,249			1,155
Allowance for doubtful accounts and other reserves	601			753
Less: valuation allowance	(1,796		)	(2,772		)
Total deferred tax assets	70,541			58,635
Deferred tax liabilities:
Depreciation and amortization	(9,523		)	(8,659		)
Net deferred tax asset	$	61,018		$	49,976

At March 31, 2017 the Company maintained valuation allowances totaling $1,796 against New Jersey state research tax credits due to uncertainties related to the ability to utilize such state research tax credits before they expire. The Company decreased the valuation allowance $976 in fiscal 2017 due to the expiration of a portion of the NJ research tax credits and higher estimates of forecasted New Jersey taxable income. The Company based its valuation allowance on its estimates of taxable income and the period over which its state research tax credits will be recoverable.

It is the Company’s intention to reinvest undistributed earnings of its foreign subsidiaries and thereby infinitely postpone their remittance. As a result, deferred U.S. income taxes have not been provided on undistributed earnings of foreign subsidiaries of the Company. In the event we needed to repatriate funds from outside of the United States, such repatriation would likely be subject to restrictions by local laws and/or tax consequences including foreign withholding taxes or U.S. income taxes. It is not currently practical to estimate the legal restrictions or tax liability that would arise from such repatriations. The cumulative amount of unremitted earnings from the foreign subsidiaries that is expected to be permanently reinvested was approximately $26,176 on March 31, 2017.

Excess tax benefits related to share-based payments are credited to equity. When determining this excess tax benefit, the Company elected to follow the tax law approach. As a result, the Company’s excess tax benefit which was recorded to equity was approximately $3,682 and $3,265 for the years ended March 31, 2017 and 2016, respectively.

At March 31, 2017, the Company has federal and state research tax credit (R&D credits) carryforwards of approximately $3,253 and $3,175, respectively. The federal research tax credit carryforwards expire from 2025 through 2036, and the state research tax credit carryforwards expire from 2017 through 2023. At March 31, 2017, the Company has federal Alternative Minimum Tax credit carryforwards of $1,149.

The Company conducts business globally and as a result, files income tax returns in the United States and in various state and foreign jurisdictions. In the normal course of business, the Company is subject to examination by taxing authorities throughout the world, including such major jurisdictions are the United States, Australia, Canada, Germany, Netherlands and United Kingdom. The Company is currently under audit in the United Kingdom, India, and New Jersey. The following table summarizes the tax years in the Company’s major tax jurisdictions that remain subject to income tax examinations by tax authorities as of March 31, 2017. The years subject to income tax examination in the Company’s foreign jurisdictions cover the maximum time period with respect to these jurisdictions. Due to NOL carryforwards, in some cases the tax years continue to remain subject to examination with respect to such NOLs.



Tax Jurisdiction	Years Subject to Income Tax Examination
U.S. Federal	2013 - Present
New Jersey	2012 - Present
Foreign jurisdictions	2012 - Present



Balance at March 31, 2014	$	4,113
Additions for tax positions related to fiscal 2015	490
Additions for tax positions related to prior years	252
Settlements and effective settlements with tax authorities and remeasurements	(2,838		)
Reductions related to the expiration of statutes of limitations	—
Foreign currency translation adjustment	(12		)
Balance at March 31, 2015	2,005
Additions for tax positions related to fiscal 2016	—
Additions for tax positions related to prior years	170
Settlements and effective settlements with tax authorities and remeasurements	(171		)
Reductions related to the expiration of statutes of limitations	(64		)
Foreign currency translation adjustment	12
Balance at March 31, 2016	1,952
Additions for tax positions related to fiscal 2017	—
Additions for tax positions related to prior years	179
Settlements and effective settlements with tax authorities and remeasurements	—
Reductions related to the expiration of statutes of limitations	—
Foreign currency translation adjustment	(33		)
Balance at March 31, 2017	$	2,098

All of the Company’s unrecognized tax benefits at March 31, 2017 of $2,098, if recognized, would favorably affect the effective tax rate. Components of the reserve are classified as either current or long-term in the Consolidated Balance Sheet based on when the Company expects each of the items to be settled. Unrecognized tax benefits and the related accrued interest and penalties totaling $1,950 are recorded as Other Liabilities on the Consolidated Balance Sheet, of which $287 represents interest and penalties. The Company also has unrecognized tax benefits and related accrued interest and penalties totaling $548 as a reduction of Deferred Tax Assets on the Consolidated Balance Sheet, of which $113 represents interest and penalties.

The Company estimates that no remaining unrecognized tax benefits will be realized during the fiscal year ending March 31, 2018. Interest and penalties related to unrecognized tax benefits are recorded in income tax expense. In the years ended March 31, 2017, 2016 and 2015, the Company recognized $61, $52 and $224, respectively, of interest and penalties in the Consolidated Statement of Income.

Employee Benefit Plan	12 Months Ended
Employee Benefit Plan	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plan	Employee Benefit Plan The Company has a defined contribution plan, as allowed under Section 401(k) of the Internal Revenue Code, covering substantially all employees. Effective January 1, 2012, the Company makes contributions equal to a discretionary percentage of the employee’s contributions determined by the Company. During the years ended March 31, 2017, 2016 and 2015, the Company made contributions of $2,998, $2,047, and $1,955, respectively.

Segment Information

12 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Segment Information

The Company operates in one segment. The Company’s products and services are sold throughout the world, through direct and indirect sales channels. The Company’s chief operating decision maker (the “CODM”) is the chief executive officer. The CODM makes operating performance assessment and resource allocation decisions on a global basis. The CODM does not receive discrete financial information about asset allocation, expense allocation or profitability by product or geography.

Revenues by geography are based upon the billing address of the customer. All transfers between geographic regions have been eliminated from consolidated revenues. The following table sets forth revenue and long-lived assets by geographic area:



	Year Ended March 31,
	2017		2016		2015
Revenue:
United States	$	367,423	$	343,015	$	344,931
Other	283,095		252,111		262,612
	$	650,518	$	595,126	$	607,543

No individual country other than the United States accounts for 10% or more of revenues in the years ended March 31, 2017, 2016 and 2015. Revenue included in the “Other” caption above primarily relates to the Company’s operations in Europe, Australia, Canada and Asia.



	March 31,
	2017		2016
Long-lived assets:
United States	$	131,083	$	135,562
Other	8,509		7,079
	$	139,592	$	142,641

At March 31, 2017 and 2016 no other individual country, other than the United States, accounts for 10% or more of long-lived assets.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 34
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8981-108599

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 4: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
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-Topic 280
-SubTopic 10
-Section 50
-Paragraph 26
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Reference 8: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Section 50
-Paragraph 40
-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9031-108599

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 42
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-Name Accounting Standards Codification
-Topic 280
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Reference 12: http://www.xbrl.org/2003/role/presentationRef
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Reference 13: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Reference 14: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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-URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e8906-108599

+ Details

Selected Quarterly Financial Data (unaudited)

12 Months Ended

Mar. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data (unaudited)



	Quarter Ended
	June 30			September 30			December 31			March 31
Fiscal 2017
Total revenue	$	152,413		$	159,333		$	165,841		$	172,931
Gross margin	131,418			137,676			144,675			151,557
Net income (loss)	(2,044		)	(562		)	(42		)	3,188
Net income (loss) per common share:
Basic (1)	$	(0.05	)	$	(0.01	)	$	(0.00	)	$	0.07
Diluted (1)	$	(0.05	)	$	(0.01	)	$	(0.00	)	$	0.07
	Quarter Ended
	June 30			September 30			December 31			March 31
Fiscal 2016
Total revenue	$	139,123		$	140,742		$	155,696		$	159,565
Gross margin	118,576			119,803			135,267			138,768
Net income (loss)	(1,300		)	(9,236		)	4,878			5,794
Net income (loss) per common share:
Basic (1)	$	(0.03	)	$	(0.20	)	$	0.11		$	0.13
Diluted (1)	$	(0.03	)	$	(0.20	)	$	0.10		$	0.13


(1)	Per common share amounts for the quarters and full year have been calculated separately. Accordingly, quarterly amounts do not add to the annual amount because of differences in the weighted average common shares outstanding during each period used in the basic and diluted calculations.

Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Mar. 31, 2017

Valuation and Qualifying Accounts [Abstract]

Schedule II - Valuation and Qualifying Accounts

Schedule II — Valuation and Qualifying Accounts



	Balance at Beginning of Year		Charged (Credited) to Costs and Expenses			Deductions		Balance at End of Year
	(In thousands)
Year Ended March 31, 2015
Allowance for doubtful accounts	$	111	$	1		$	8	$	104
Valuation allowance for deferred taxes	$	1,382	$	(39	)	$	—	$	1,343
Year Ended March 31, 2016
Allowance for doubtful accounts	$	104	$	247		$	36	$	315
Valuation allowance for deferred taxes	$	1,343	$	1,429		$	—	$	2,772
Year Ended March 31, 2017
Allowance for doubtful accounts	$	315	$	(161	)	$	51	$	103
Valuation allowance for deferred taxes	$	2,772	$	(976	)	$	—	$	1,796

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Basis of Presentation

The consolidated financial statements include the accounts of the Company. All intercompany transactions and balances have been eliminated.

Use of Estimates

Revenue Recognition

The Company considers the four basic revenue recognition criteria for each of the elements as follows:


•	Persuasive evidence of an arrangement with the customer exists. The Company’s customary practice is to require a purchase order and, in some cases, a written contract signed by both the customer and the Company, or other persuasive evidence that an arrangement exists prior to recognizing revenue related to an arrangement.

•

Net Income per Common Share

Software Development Costs

Accounts Receivable and Allowance for Doubtful Accounts

Accounting for Income Taxes

Cash and Cash Equivalents

Short-term Investments

Concentration of Credit Risk

The Company grants credit to customers in a wide variety of industries worldwide and generally does not require collateral. Credit losses relating to these customers have been minimal.

Fair Value of Financial Instruments

Level 1 — Quoted prices in active markets for identical assets or liabilities.

Level 3 — Unobservable inputs that are supported by little or no market activity and that are significant to the fair value of the assets or liabilities.

Property and Equipment

Asset Retirement Obligation

Long-Lived Assets

Equity Method Investment

Deferred Revenue

Accounting for Stock-Based Compensation

Share Repurchases

Sales Tax

The Company records revenue net of sales tax.

Advertising Costs

The Company expenses advertising costs as incurred.

Shipping and Handling Costs

Shipping and handling costs are included in cost of revenues for all periods presented.

Foreign Currency Translation

Foreign currency transaction gains and losses are recorded in “General and administrative expenses” in the Consolidated Statements of Income.

Comprehensive Income (Loss)

Comprehensive income (loss) is defined to include all changes in equity, except those resulting from investments by stockholders and distribution to stockholders.

Recently Issued Accounting Standards

Revenue Recognition


•	A portion of sales commissions cost will be recorded as an asset and recognized as an operating expense over the time period that the Company expects to recover the costs. Currently, the Company expenses commissions cost as incurred.

•

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2017

Accounting Policies [Abstract]

Computation of Basic and Diluted Net Income Per Common Share

The following table sets forth the computation of basic and diluted net income per common share:



	Year Ended March 31,
	2017		2016		2015
Net income	$	540	$	136	$	25,650
Basic net income per common share:
Basic weighted average shares outstanding	44,700		45,159		45,464
Basic net income per common share	$	0.01	$	0.00	$	0.56
Diluted net income per common share:
Basic weighted average shares outstanding	44,700		45,159		45,464
Dilutive effect of stock options, restricted stock units, and employee stock purchase plan	1,921		1,330		1,758
Diluted weighted average shares outstanding	46,621		46,489		47,222
Diluted net income per common share	$	0.01	$	0.00	$	0.54

Summary of Potential Outstanding Common Stock Equivalents



	Year Ended March 31,
	2017	2016	2015
Stock options, restricted stock units, and shares under the employee stock purchase plan	2,492	4,183	3,136

Financial Assets Measured At Fair Value On Recurring Basis

The following table summarizes the composition of the Company’s financial assets measured at fair value on a recurring basis at March 31, 2017 and March 31, 2016:



March 31, 2017	Level 1		Level 2		Level 3	Total
Cash equivalents	$	70,190	—		—	$	70,190
Short-term investments	—		$	120,989	—	$	120,989



March 31, 2016	Level 1		Level 2		Level 3	Total
Cash equivalents	$	95,735	—		—	$	95,735
Short-term investments	—		$	99,215	—	$	99,215

Deferred Revenue

Deferred revenue consists of the following:



	March 31,
	2017		2016
Current:
Deferred software revenue	$	2,793	$	1,578
Deferred services revenue	203,984		193,399
	206,777		194,977
Non-current:
Deferred services revenue	70,803		49,889
Total Deferred Revenue	$	277,580	$	244,866

New Accounting Pronouncement, Early Adoption

Select recast unaudited financial statement information, which reflect the adoption of the ASU is below. The Company’s historical net cash flows are not impacted by this accounting change.



	Year Ended March 31, 2016
	Unaudited
	As Reported			Adjustments			Recast for Adoption of ASC 606
Revenues:
Software	$	258,793		$	(702	)	$	258,091
Services	336,333			(657		)	335,676
Total revenues	595,126			(1,359		)	593,767
Total cost of revenues	82,712			—			82,712
Gross margin	512,414			(1,359		)	511,055
Total operating expenses	510,415			(3,470		)	506,945
Income from operations	1,999			2,111			4,110
Interest expense	(933		)	—			(933		)
Interest income	862			—			862
Equity in loss of affiliate	(83		)	—			(83		)
Income before income taxes	1,845			2,111			3,956
Income tax expense	1,709			527			2,236
Net income	$	136		$	1,584		$	1,720



	Year Ended March 31, 2017
	Unaudited
	As Reported			Adjustments			Recast for Adoption of ASC 606
Revenues:
Software	$	296,421		$	(5,753	)	$	290,668
Services	354,097			240			354,337
Total revenues	650,518			(5,513		)	645,005
Total cost of revenues	85,192			—			85,192
Gross margin	565,326			(5,513		)	559,813
Total operating expenses	565,097			(4,042		)	561,055
Income (loss) from operations	229			(1,471		)	(1,242		)
Interest expense	(957		)	—			(957		)
Interest income	1,163			—			1,163
Equity in loss of affiliate	(958		)	—			(958		)
Loss before income taxes	(523		)	(1,471		)	(1,994		)
Income tax benefit	(1,063		)	(423		)	(1,486		)
Net income (loss)	$	540		$	(1,048	)	$	(508	)



	March 31, 2017
	Unaudited Balance Sheet Data
	As Reported			Adjustments			Recast for Adoption of ASC 606
Current assets:
Trade accounts receivable	$	132,761		$	1,789		$	134,550
Unbilled receivables	$	—		$	1,211		$	1,211
Total current assets	$	598,736		$	3,000		$	601,736
Deferred commissions	$	—		$	30,378		$	30,378
Deferred tax assets, net	$	61,018		$	(10,790	)	$	50,228
Total assets	$	802,967		$	22,588		$	825,555
Current Liabilities:
Deferred revenue	$	206,777		$	(2,001	)	$	204,776
Total current liabilities	$	285,595		$	(2,001	)	$	283,594
Other liabilities	$	3,934		$	292		$	4,226
Accumulated deficit	$	(239,974	)	$	24,297		$	(215,677	)
Total stockholders’ equity	$	442,635		$	24,297		$	466,932
Total liabilities and stockholders’ equity	$	802,967		$	22,588		$	825,555

Property and Equipment (Tables)

12 Months Ended

Mar. 31, 2017

Property, Plant and Equipment [Abstract]

Property and Equipment

Property and equipment consist of the following:



	March 31,
	2017			2016
Land	$	9,445		$	9,445
Buildings	103,244			103,193
Computers, servers and other equipment	35,274			33,120
Furniture and fixtures	14,912			14,458
Leasehold improvements	7,040			6,948
Purchased software	1,335			1,279
Construction in process	1,147			165
	172,397			168,608
Less: Accumulated depreciation and amortization	(40,078		)	(32,704		)
	$	132,319		$	135,904

Accrued Liabilities (Tables)

12 Months Ended

Mar. 31, 2017

Payables and Accruals [Abstract]

Accrued Liabilities

Accrued liabilities consist of the following:



	March 31,
	2017		2016
Compensation and related payroll taxes	$	45,149	$	36,789
Other	33,552		32,889
	$	78,701	$	69,678

Commitments and Contingencies (Tables)

12 Months Ended

Mar. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Future Minimum Lease Payments Under All Operating Leases

Future minimum lease payments under all operating leases at March 31, 2017 are as follows:



Year Ending March 31,
2018	$	9,504
2019	7,588
2020	6,391
2021	5,238
2022 and thereafter	6,002
	$	34,723

Stock Plans (Tables)

12 Months Ended

Mar. 31, 2017

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Schedule of Stock Option Valuation Assumptions

The assumptions used in the Black-Scholes option-pricing model are as follows:



	Year Ended March 31,
	2016	2015
Dividend yield	None	None
Expected volatility	39% - 43%	41% - 47%
Weighted average expected volatility	41%	46%
Risk-free interest rates	1.29% - 1.75%	1.22% - 2.18%
Weighted average expected life (in years)	4.6	5.7

Schedule of Stock Option Activity

The following summarizes the activity for the Company’s stock incentive plans from March 31, 2014 to March 31, 2017:



Options	Number of Options		Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at March 31, 2014	6,388		$	39.03
Options granted	1,155		46.08
Options exercised	(504	)	19.44
Options forfeited	(159	)	65.93
Options expired	(27	)	68.84
Outstanding at March 31, 2015	6,853		40.91
Options granted	148		41.84
Options exercised	(764	)	8.80
Options forfeited	(172	)	59.79
Options expired	(126	)	61.81
Outstanding at March 31, 2016	5,939		44.07
Options granted	—		—
Options exercised	(446	)	28.44
Options forfeited	(77	)	51.55
Options expired	(116	)	68.98
Outstanding at March 31, 2017	5,300		$	44.74	4.81	$	70,743
Vested or expected to vest at March 31, 2017	5,287		$	44.73	4.80	$	70,667
Exercisable at March 31, 2017	4,686		$	43.42	4.46	$	68,022

Summary of Stock Options Outstanding Under Plan And LTIP

The following table summarizes information on stock options outstanding at March 31, 2017:



Range of Exercise Prices	Options Outstanding at March 31, 2017	Weighted-Average			Options Exercisable at March 31, 2017	Weighted- Average Exercise Price
Range of Exercise Prices	Options Outstanding at March 31, 2017	Remaining Contractual Life	Exercise Price		Options Exercisable at March 31, 2017	Weighted- Average Exercise Price
$11.12 - 13.81	864	1.36	$	12.36	864	$	12.36
15.88 - 23.88	395	2.13	20.79		395	20.79
26.83	533	3.54	26.83		533	26.83
27.02 - 41.31	144	5.99	36.02		93	34.51
41.55	670	4.54	41.55		670	41.55
43.30 - 45.39	65	7.96	44.47		32	44.40
45.44	689	7.54	45.44		363	45.44
46.59 - 55.58	250	6.76	49.89		192	50.31
56.57	650	5.53	56.57		650	56.57
58.25 - 87.20	1,040	6.42	84.11		894	83.80
$11.12 - 87.20	5,300	4.81	$	44.74	4,686	$	43.42

Schedule of Restricted Stock Unit Activity

Restricted stock unit activity is as follows:



Non-Vested Restricted Stock Units	Number of Awards		Weighted Average Grant Date Fair Value
Non-vested as of March 31, 2014	1,202		$	65.63
Granted	815		46.62
Vested	(491	)	59.22
Forfeited	(114	)	63.70
Non-vested as of March 31, 2015	1,412		56.82
Granted	1,543		37.27
Vested	(547	)	38.38
Forfeited	(196	)	49.24
Non-vested as of March 31, 2016	2,212		43.43
Granted	1,333		50.66
Vested	(975	)	51.35
Forfeited	(174	)	43.56
Non-vested as of March 31, 2017	2,396		$	45.53

Stock-Based Compensation Expense



	Year Ended March 31,
	2017		2016		2015
Cost of services revenue	$	3,925	$	3,106	$	2,930
Sales and marketing	34,005		28,557		26,853
Research and development	7,335		6,722		5,908
General and administrative	28,663		25,811		24,972
Stock-based compensation expense	$	73,928	$	64,196	$	60,663

Income Taxes (Tables)

12 Months Ended

Mar. 31, 2017

Income Tax Disclosure [Abstract]

Components of Income Before Income Taxes

The components of income (loss) before income taxes were as follows:



	Year Ended March 31,
	2017			2016			2015
Domestic	$	(7,698	)	$	(6,869	)	$	28,048
Foreign	7,175			8,714			10,844
	$	(523	)	$	1,845		$	38,892

Components of Income Tax Expense (Benefit)

The components of income tax expense (benefit) were as follows:



	Year Ended March 31,
	2017			2016			2015
Current:
Federal	$	6,138		$	4,983		$	1,777
State	(977		)	1,076			2,533
Foreign	4,818			4,982			4,791
Deferred:
Federal	(11,144		)	(9,171		)	4,237
State	(56		)	324			(24		)
Foreign	158			(485		)	(72		)
	$	(1,063	)	$	1,709		$	13,242

Reconciliation of Statutory Tax Rates and Effective Tax Rates

A reconciliation of the statutory tax rates and the effective tax rates for the years ended March 31, 2017, 2016 and 2015 are as follows:



	Year Ended March 31,
	2017		2016		2015
Statutory federal income tax expense (benefit) rate	(35.0	)%	35.0	%	35.0	%
State and local income tax expense, net of federal income tax effect	11.2	%	11.2	%	3.0	%
Impact of limit on executive compensation	—	%	—	%	3.2	%
Foreign earnings taxed at different rates	501.2	%	67.9	%	1.0	%
Domestic permanent differences	368.4	%	116.8	%	4.1	%
Foreign tax credits	(258.2	)%	(54.1	)%	(2.8	)%
Research credits	(622.2	)%	(141.2	)%	(4.9	)%
Tax reserves	15.6	%	8.7	%	(5.3	)%
Valuation allowance	(121.4	)%	50.1	%	—	%
Statutory tax rate changes	60.8	%	(20.1	)%	—	%
Other differences, net	(123.7	)%	18.3	%	0.7	%
Effective income tax expense (benefit)	(203.3	)%	92.6	%	34.0	%

Components of Deferred Tax Assets

The significant components of the Company’s deferred tax assets are as follows:



	March 31,
	2017			2016
Deferred tax assets:
Stock-based compensation	$	45,867		$	40,033
Deferred revenue	11,810			12,496
Tax credits	12,810			6,970
Accrued expenses	1,249			1,155
Allowance for doubtful accounts and other reserves	601			753
Less: valuation allowance	(1,796		)	(2,772		)
Total deferred tax assets	70,541			58,635
Deferred tax liabilities:
Depreciation and amortization	(9,523		)	(8,659		)
Net deferred tax asset	$	61,018		$	49,976

Schedule of Tax Years Subject to Income Tax Examination

The following table summarizes the tax years in the Company’s major tax jurisdictions that remain subject to income tax examinations by tax authorities as of March 31, 2017. The years subject to income tax examination in the Company’s foreign jurisdictions cover the maximum time period with respect to these jurisdictions. Due to NOL carryforwards, in some cases the tax years continue to remain subject to examination with respect to such NOLs.



Tax Jurisdiction	Years Subject to Income Tax Examination
U.S. Federal	2013 - Present
New Jersey	2012 - Present
Foreign jurisdictions	2012 - Present

Reconciliation of Amounts of Unrecognized Tax Benefits

A reconciliation of the amounts of unrecognized tax benefits is as follows:



Balance at March 31, 2014	$	4,113
Additions for tax positions related to fiscal 2015	490
Additions for tax positions related to prior years	252
Settlements and effective settlements with tax authorities and remeasurements	(2,838		)
Reductions related to the expiration of statutes of limitations	—
Foreign currency translation adjustment	(12		)
Balance at March 31, 2015	2,005
Additions for tax positions related to fiscal 2016	—
Additions for tax positions related to prior years	170
Settlements and effective settlements with tax authorities and remeasurements	(171		)
Reductions related to the expiration of statutes of limitations	(64		)
Foreign currency translation adjustment	12
Balance at March 31, 2016	1,952
Additions for tax positions related to fiscal 2017	—
Additions for tax positions related to prior years	179
Settlements and effective settlements with tax authorities and remeasurements	—
Reductions related to the expiration of statutes of limitations	—
Foreign currency translation adjustment	(33		)
Balance at March 31, 2017	$	2,098

Segment Information (Tables)

12 Months Ended

Mar. 31, 2017

Segment Reporting [Abstract]

Schedule of Revenue by Geographic Area

The following table sets forth revenue and long-lived assets by geographic area:



	Year Ended March 31,
	2017		2016		2015
Revenue:
United States	$	367,423	$	343,015	$	344,931
Other	283,095		252,111		262,612
	$	650,518	$	595,126	$	607,543

Schedule of Long-Lived Assets by Geographic Area



	March 31,
	2017		2016
Long-lived assets:
United States	$	131,083	$	135,562
Other	8,509		7,079
	$	139,592	$	142,641

Selected Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Mar. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Schedule of Selected Quarterly Financial Data



	Quarter Ended
	June 30			September 30			December 31			March 31
Fiscal 2017
Total revenue	$	152,413		$	159,333		$	165,841		$	172,931
Gross margin	131,418			137,676			144,675			151,557
Net income (loss)	(2,044		)	(562		)	(42		)	3,188
Net income (loss) per common share:
Basic (1)	$	(0.05	)	$	(0.01	)	$	(0.00	)	$	0.07
Diluted (1)	$	(0.05	)	$	(0.01	)	$	(0.00	)	$	0.07
	Quarter Ended
	June 30			September 30			December 31			March 31
Fiscal 2016
Total revenue	$	139,123		$	140,742		$	155,696		$	159,565
Gross margin	118,576			119,803			135,267			138,768
Net income (loss)	(1,300		)	(9,236		)	4,878			5,794
Net income (loss) per common share:
Basic (1)	$	(0.03	)	$	(0.20	)	$	0.11		$	0.13
Diluted (1)	$	(0.03	)	$	(0.20	)	$	0.10		$	0.13


(1)	Per common share amounts for the quarters and full year have been calculated separately. Accordingly, quarterly amounts do not add to the annual amount because of differences in the weighted average common shares outstanding during each period used in the basic and diluted calculations.

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2017 USD ($) revenue_source	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Number of sources of primary revenue \| revenue_source	2
Length of customer support agreement (in years)	1 year
Number of days for other professional services	90 days
Net deferred tax assets	$ 61,018,000	$ 49,976,000
Valuation allowance for deferred tax assets	1,796,000
Unrecognized tax benefits which would favorably affect the effective tax rate once recognized	2,098,000
Accrued interest and penalties	400,000
Asset retirement obligation	1,204,000	1,071,000
Asset impairment charges	0	0	$ 0
Advertising expenses	7,816,000	5,083,000	5,401,000
Net foreign currency transaction gain (loss)	$ 644,000	195,000	127,000
Duration of forward contracts utilized for hedging, Minimum (in months)	1 month
Duration of forward contracts utilized for hedging, Maximum (in months)	3 months
Net realized gains (losses) related to settlement of forward exchange contracts recorded in general and administrative expenses	$ 15,000	$ (53,000)	$ 33,000
PSU
Summary Of Significant Accounting Policies [Line Items]
Stock options granted, vesting period (in years)	3 years
Laitek, Inc.
Summary Of Significant Accounting Policies [Line Items]
Ownership percentage of equity method investment		34.00%
Minimum \| Buildings
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)	10 years
Minimum \| Computers, servers and other equipment
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)	18 months
Minimum \| Furniture and fixtures
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)	3 years
Maximum \| Buildings
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)	60 years
Maximum \| Computers, servers and other equipment
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)	3 years
Maximum \| Furniture and fixtures
Summary Of Significant Accounting Policies [Line Items]
Property and equipment, depreciation period (in years)	12 years
Revenue \| Arrow
Summary Of Significant Accounting Policies [Line Items]
Concentration percentage	36.00%	38.00%	36.00%
Revenue \| Customer Concentration Risk \| Avent
Summary Of Significant Accounting Policies [Line Items]
Concentration percentage	10.00%
Accounts Receivable \| Customer Concentration Risk \| Arrow
Summary Of Significant Accounting Policies [Line Items]
Concentration percentage	40.00%	43.00%
Accounts Receivable \| Customer Concentration Risk \| Avent
Summary Of Significant Accounting Policies [Line Items]
Concentration percentage	12.00%

Summary of Significant Accounting Policies - Computation of Basic and Diluted Net Income Per Common Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

3 Months Ended

12 Months Ended

Mar. 31, 2017

Dec. 31, 2016

Sep. 30, 2016

Jun. 30, 2016

Mar. 31, 2016

Dec. 31, 2015

Sep. 30, 2015

Jun. 30, 2015

Mar. 31, 2017

Mar. 31, 2016

Mar. 31, 2015

Earnings Per Share, Basic and Diluted [Abstract]

Net income

$ 3,188

$ (42)

$ (562)

$ (2,044)

$ 5,794

$ 4,878

$ (9,236)

$ (1,300)

$ 540

$ 136

$ 25,650

Basic net income per common share:

Basic weighted average shares outstanding (shares)

44,700

45,159

45,464

Basic net income per common share (in dollars per share)

$ 0.07

^[1]

$ 0.00

^[1]

$ (0.01)

^[1]

$ (0.05)

^[1]

$ 0.13

^[1]

$ 0.11

^[1]

$ (0.20)

^[1]

$ (0.03)

^[1]

$ 0.01

$ 0.00

$ 0.56

Diluted net income per common share:

Basic weighted average shares outstanding (shares)

44,700

45,159

45,464

Dilutive effect of stock options, restricted stock units, and employee stock purchase plan (in shares)

1,921

1,330

1,758

Diluted weighted average shares outstanding (in shares)

46,621

46,489

47,222

Diluted net income per common share (in dollars per share)

$ 0.07

^[1]

$ 0.00

^[1]

$ (0.01)

^[1]

$ (0.05)

^[1]

$ 0.13

^[1]

$ 0.10

^[1]

$ (0.20)

^[1]

$ (0.03)

^[1]

$ 0.01

$ 0.00

$ 0.54

[1]	Per common share amounts for the quarters and full year have been calculated separately. Accordingly, quarterly amounts do not add to the annual amount because of differences in the weighted average common shares outstanding during each period used in the basic and diluted calculations.

Summary of Significant Accounting Policies - Summary of Potential Outstanding Common Stock Equivalents (Detail) - shares shares in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Accounting Policies [Abstract]
Stock options, restricted stock units, and shares under the employee stock purchase plan (in shares)	2,492	4,183	3,136

Summary of Significant Accounting Policies - Summary of Fair Value of Financial Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 70,190	$ 95,735
Short-term investments	120,989	99,215
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	70,190	95,735
Short-term investments	0	0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Short-term investments	120,989	99,215
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Short-term investments	$ 0	$ 0

Summary of Significant Accounting Policies - Deferred Revenue (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	$ 206,777	$ 194,977
Deferred services revenue	70,803	49,889
Total Deferred Revenue	277,580	244,866
Deferred software revenue
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	2,793	1,578
Deferred services revenue
Deferred Revenue Arrangement [Line Items]
Deferred revenue, Current	$ 203,984	$ 193,399

- Definition

The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income.

+ References + Details

- Definition

The noncurrent portion of deferred revenue amount as of balance sheet date. Deferred revenue is a liability related to a revenue producing activity for which revenue has not yet been recognized, and is not expected to be recognized in the next twelve months. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

+ References + Details

Summary of Significant Accounting Policies - Recently Issued Accounting Standards - ASU 2014-09 I (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Software									$ 296,421	$ 258,793	$ 283,254
Services									354,097	336,333	324,289
Total revenues	$ 172,931	$ 165,841	$ 159,333	$ 152,413	$ 159,565	$ 155,696	$ 140,742	$ 139,123	650,518	595,126	607,543
Total cost of revenues									85,192	82,712	82,068
Gross margin	151,557	144,675	137,676	131,418	138,768	135,267	119,803	118,576	565,326	512,414	525,475
Total operating expenses									565,097	510,415	486,691
Income (loss) from operations									229	1,999	38,784
Interest expense									(957)	(933)	(665)
Interest income									1,163	862	773
Equity in loss of affiliate									(958)	(83)	0
Income (loss) before income taxes									(523)	1,845	38,892
Income tax expense (benefit)									(1,063)	1,709	13,242
Net income (loss)	$ 3,188	$ (42)	$ (562)	$ (2,044)	$ 5,794	$ 4,878	$ (9,236)	$ (1,300)	540	136	$ 25,650
Pro Forma \| Accounting Standards Update 2014-09
Revenues:
Software									290,668	258,091
Services									354,337	335,676
Total revenues									645,005	593,767
Total cost of revenues									85,192	82,712
Gross margin									559,813	511,055
Total operating expenses									561,055	506,945
Income (loss) from operations									(1,242)	4,110
Interest expense									(957)	(933)
Interest income									1,163	862
Equity in loss of affiliate									(958)	(83)
Income (loss) before income taxes									(1,994)	3,956
Income tax expense (benefit)									(1,486)	2,236
Net income (loss)									(508)	1,720
Difference between Revenue Guidance In Effect before And After Topic 606 \| Pro Forma \| Accounting Standards Update 2014-09
Revenues:
Software									(5,753)	(702)
Services									240	(657)
Total revenues									(5,513)	(1,359)
Total cost of revenues									0	0
Gross margin									(5,513)	(1,359)
Total operating expenses									(4,042)	(3,470)
Income (loss) from operations									(1,471)	2,111
Interest expense									0	0
Interest income									0	0
Equity in loss of affiliate									0	0
Income (loss) before income taxes									(1,471)	2,111
Income tax expense (benefit)									(423)	527
Net income (loss)									$ (1,048)	$ 1,584

Summary of Significant Accounting Policies - Recently Issued Accounting Standards - ASU 2014-09 II (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Current assets:
Trade accounts receivable	$ 132,761	$ 113,429
Total current assets	598,736	517,377
Deferred tax assets, net	61,018	49,976
Total assets	802,967	714,573
Current Liabilities:
Deferred revenue	206,777	194,977
Total current liabilities	285,595	264,964
Other liabilities	3,934	3,452
Accumulated deficit	(239,974)	(197,962)
Total stockholders’ equity	442,635	396,268	$ 407,010	$ 462,578
Total liabilities and stockholders’ equity	802,967	$ 714,573
Pro Forma \| Accounting Standards Update 2014-09
Current assets:
Trade accounts receivable	134,550
Unbilled receivables	1,211
Total current assets	601,736
Deferred commissions	30,378
Deferred tax assets, net	50,228
Total assets	825,555
Current Liabilities:
Deferred revenue	204,776
Total current liabilities	283,594
Other liabilities	4,226
Accumulated deficit	(215,677)
Total stockholders’ equity	466,932
Total liabilities and stockholders’ equity	825,555
Difference between Revenue Guidance In Effect before And After Topic 606 \| Pro Forma \| Accounting Standards Update 2014-09
Current assets:
Trade accounts receivable	1,789
Unbilled receivables	1,211
Total current assets	3,000
Deferred commissions	30,378
Deferred tax assets, net	(10,790)
Total assets	22,588
Current Liabilities:
Deferred revenue	(2,001)
Total current liabilities	(2,001)
Other liabilities	292
Accumulated deficit	24,297
Total stockholders’ equity	24,297
Total liabilities and stockholders’ equity	$ 22,588

Property and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 172,397	$ 168,608
Less: Accumulated depreciation and amortization	(40,078)	(32,704)
Property and equipment, net	132,319	135,904
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross	9,445	9,445
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross	103,244	103,193
Computers, servers and other equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	35,274	33,120
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	14,912	14,458
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7,040	6,948
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,335	1,279
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1,147	$ 165

Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 9,980	$ 10,927	$ 8,856

Accrued Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Payables and Accruals [Abstract]
Compensation and related payroll taxes	$ 45,149	$ 36,789
Other	33,552	32,889
Total accrued liabilities	$ 78,701	$ 69,678

Commitments and Contingencies - Future Minimum Lease Payments Under All Operating Leases (Detail) $ in Thousands	Mar. 31, 2017 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2018	$ 9,504
2019	7,588
2020	6,391
2021	5,238
2022 and thereafter	6,002
Future minimum lease payments, Total	$ 34,723

Commitments and Contingencies - Additional Information (Detail)		12 Months Ended
	Feb. 27, 2017 patent	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Rent expenses		$ 10,377,000	$ 9,856,000	$ 10,845,000
Non-cancellable purchase commitments, 2018		11,051,000
Non-cancellable purchase commitments, 2019		6,615,000
Non-cancellable purchase commitments, 2020		3,373,000
Non-cancellable purchase commitments, 2021		221,000
Non-cancellable purchase commitments, Total for all periods through fiscal 2021		21,260,000
Royalty expense		$ 2,646,000	1,933,000	1,768,000
Maximum software warranty period (in days)		90 days
Product warranty accrual		$ 0	$ 0	$ 0
Realtime Data LLC d/b/a IXO
Loss Contingencies [Line Items]
Number of patents involved in alleged infringement \| patent	4

Revolving Credit Facility - Additional Information (Detail) - Revolving Credit Facility - USD ($)		12 Months Ended
	Jun. 30, 2014	Mar. 31, 2017	Mar. 31, 2016
Line of Credit Facility [Line Items]
Term (in years)	5 years
Borrowing capacity	$ 250,000,000
Commitment fee percentage	0.25%
Outstanding borrowings under credit facility		$ 0
Unamortized debt issuance expense		568,000	$ 820,000
Amortization of debt issuance expense		$ 252,000	$ 252,000
LIBOR
Line of Credit Facility [Line Items]
Variable rate (percent)	1.50%

Capitalization - Additional Information (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2017 USD ($) business_day $ / shares shares	Mar. 31, 2016 USD ($) $ / shares shares	Mar. 31, 2015 USD ($)	Nov. 13, 2008 right
Class of Stock [Line Items]
Common stock, shares authorized (in shares)	250,000,000	250,000,000
Preferred stock, shares authorized (in shares)	50,000,000	50,000,000
Preferred stock, shares outstanding (in shares)	0	0
Number of rights declared as dividend distribution for each outstanding share of common stock \| right				1
Description of exercise entitlement of each right	Each Right, when exercisable, entitles the registered holder to purchase one one-thousandth of a share of Series A Junior Participating Preferred Stock, par value $0.01 per share, at a purchase price of eighty dollars per one one-thousandth of a share, subject to adjustment.
Conditions under which rights become exercisable	The Rights will become exercisable following the tenth business day after (i) a person or group announces the acquisition of 15% or more of the Company’s common stock or (ii) commencement of a tender or exchange offer, the consummation of which would result in ownership by the person or group of 15% or more of the Company’s common stock.
Preferred stock, par value (in dollars per share) \| $ / shares	$ 0.01	$ 0.01
Period before rights become exercisable \| business_day	10
Minimum acquisition percentage of company stock needed for rights to become exercisable	15.00%
Redemption price of each right (in dollars per share) \| $ / shares	$ 0.001
Expiration date of rights	Nov. 14, 2018
Common stock, shares outstanding (in shares)	44,816,000	44,134,000
Common stock, par value (in dollars per share) \| $ / shares	$ 0.01	$ 0.01
Amount of common stock repurchased \| $	$ 49,998	$ 91,477	$ 155,125
Options outstanding (in shares)	5,300,000
Restricted Stock Units
Class of Stock [Line Items]
Options outstanding (in shares)	4,478,000
Common Stock Repurchased
Class of Stock [Line Items]
Amount of common stock repurchased \| $	$ 49,998
Number of shares repurchased (in shares)	982,000
Remaining value of common stock to be repurchased under share repurchase program \| $	$ 125,000
Series A Junior Participating Preferred
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)	150,000
Number of shares per Right (in shares)	0.001
Preferred stock, par value (in dollars per share) \| $ / shares	$ 0.01
Exercise purchase price of preferred stock rights (in dollars per share) \| $ / shares	$ 80

Stock Plans - Additional Information (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2017 USD ($) stock_plan shares	Mar. 31, 2016 USD ($) $ / shares	Mar. 31, 2015 USD ($) $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense	$ 95,364
Awards expected to be recognized over a weighted average period (in years)	1 year 6 months 3 days
Weighted average fair value of stock options granted per share (in dollars per share) \| $ / shares		$ 15.20	$ 20.16
Total intrinsic value of options exercised	$ 9,896	$ 23,391	$ 15,069
Total fair value of restricted stock units - vested	50,051	20,981	24,592
Recognized tax benefit related to stock-based compensation	$ 23,473	$ 17,010	$ 18,570
Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, vesting period (in years)	4 years
Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, vesting period (in years)	3 years
Minimum \| Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, vesting period (in years)	1 year
Maximum \| Equity Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, vesting period (in years)	3 years
2016 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock incentive plans \| stock_plan	1
Options available for future grant (in shares) \| shares	2,078
2006 Long-Term Stock Inventive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock incentive plans \| stock_plan	1

Stock Plans - Assumptions Used in Black-Scholes Option-Pricing Model (Detail)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility, minimum	39.00%	41.00%
Expected volatility, maximum	43.00%	47.00%
Weighted average expected volatility	41.00%	46.00%
Risk-free interest rates, minimum	1.29%	1.22%
Risk-free interest rates, maximum	1.75%	2.18%
Weighted average expected life (in years)	4 years 7 months 6 days	5 years 8 months 1 day

Stock Plans - Activity for Company's Two Stock Incentive Plans (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Number of Options
Number of Options, Outstanding beginning balance (in shares)	5,939	6,853	6,388
Number of Options, Options granted (in shares)	0	148	1,155
Number of Options, Options exercised (in shares)	(446)	(764)	(504)
Number of Options, Options forfeited (in shares)	(77)	(172)	(159)
Number of Options, Options expired (in shares)	(116)	(126)	(27)
Number of Options, Outstanding ending balance (in shares)	5,300	5,939	6,853
Number of Options, Vested or expected to vest at March 31, 2017 (in shares)	5,287
Number of Options, Exercisable at March 31, 2017 (in shares)	4,686
Weighted- Average Exercise Price
Weighted-Average Exercise Price, Outstanding beginning balance (in dollars per share)	$ 44.07	$ 40.91	$ 39.03
Weighted-Average Exercise Price, Options granted (in dollars per share)	0.00	41.84	46.08
Weighted-Average Exercise Price, Options exercised (in dollars per share)	28.44	8.80	19.44
Weighted-Average Exercise Price, Options forfeited (in dollars per share)	51.55	59.79	65.93
Weighted-Average Exercise Price, Options expired (in dollars per share)	68.98	61.81	68.84
Weighted-Average Exercise Price, Outstanding ending balance (in dollars per share)	44.74	$ 44.07	$ 40.91
Weighted-Average Exercise Price, Vested or expected to vest at March 31, 2017 (in dollars per share)	44.73
Weighted-Average Exercise Price, Exercisable at March 31, 2017 (in dollars per share)	$ 43.42
Weighted- Average Remaining Contractual Term (Years)
Weighted-Average Remaining Contractual Term, Outstanding at March 31, 2017 (in years)	4 years 9 months 21 days
Weighted-Average Remaining Contractual Term, Vested or expected to vest at March 31, 2017 (in years)	4 years 9 months 18 days
Weighted-Average Remaining Contractual Term, Exercisable at March 31, 2017 (in years)	4 years 5 months 15 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Outstanding at March 31, 2017	$ 70,743
Aggregate Intrinsic Value, Vested or expected to vest at March 31, 2017	70,667
Aggregate Intrinsic Value, Exercisable at March 31, 2017	$ 68,022

Stock Plans - Summary of Stock Options Outstanding Under Plan and LTIP (Detail) shares in Thousands	12 Months Ended
	Mar. 31, 2017 $ / shares shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	$ 11.12
Range of Exercise Prices, upper range limit (in dollars per share)	$ 87.20
Options Outstanding at March 31, 2017 (in shares) \| shares	5,300
Weighted-Average Remaining Contractual Life (in years)	4 years 9 months 21 days
Weighted-Average Exercise Price (in dollars per share)	$ 44.74
Options Exercisable at March 31, 2017 (in shares) \| shares	4,686
Weighted- Average Exercise Price (in dollars per share)	$ 43.42
$11.12 - 13.81
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	11.12
Range of Exercise Prices, upper range limit (in dollars per share)	$ 13.81
Options Outstanding at March 31, 2017 (in shares) \| shares	864
Weighted-Average Remaining Contractual Life (in years)	1 year 4 months 9 days
Weighted-Average Exercise Price (in dollars per share)	$ 12.36
Options Exercisable at March 31, 2017 (in shares) \| shares	864
Weighted- Average Exercise Price (in dollars per share)	$ 12.36
15.88 - 23.88
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	15.88
Range of Exercise Prices, upper range limit (in dollars per share)	$ 23.88
Options Outstanding at March 31, 2017 (in shares) \| shares	395
Weighted-Average Remaining Contractual Life (in years)	2 years 1 month 17 days
Weighted-Average Exercise Price (in dollars per share)	$ 20.79
Options Exercisable at March 31, 2017 (in shares) \| shares	395
Weighted- Average Exercise Price (in dollars per share)	$ 20.79
26.83
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	$ 26.83
Options Outstanding at March 31, 2017 (in shares) \| shares	533
Weighted-Average Remaining Contractual Life (in years)	3 years 6 months 14 days
Weighted-Average Exercise Price (in dollars per share)	$ 26.83
Options Exercisable at March 31, 2017 (in shares) \| shares	533
Weighted- Average Exercise Price (in dollars per share)	$ 26.83
27.02 - 41.31
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	27.02
Range of Exercise Prices, upper range limit (in dollars per share)	$ 41.31
Options Outstanding at March 31, 2017 (in shares) \| shares	144
Weighted-Average Remaining Contractual Life (in years)	5 years 11 months 26 days
Weighted-Average Exercise Price (in dollars per share)	$ 36.02
Options Exercisable at March 31, 2017 (in shares) \| shares	93
Weighted- Average Exercise Price (in dollars per share)	$ 34.51
41.55
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	$ 41.55
Options Outstanding at March 31, 2017 (in shares) \| shares	670
Weighted-Average Remaining Contractual Life (in years)	4 years 6 months 14 days
Weighted-Average Exercise Price (in dollars per share)	$ 41.55
Options Exercisable at March 31, 2017 (in shares) \| shares	670
Weighted- Average Exercise Price (in dollars per share)	$ 41.55
43.30 - 45.39
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	43.30
Range of Exercise Prices, upper range limit (in dollars per share)	$ 45.39
Options Outstanding at March 31, 2017 (in shares) \| shares	65
Weighted-Average Remaining Contractual Life (in years)	7 years 11 months 15 days
Weighted-Average Exercise Price (in dollars per share)	$ 44.47
Options Exercisable at March 31, 2017 (in shares) \| shares	32
Weighted- Average Exercise Price (in dollars per share)	$ 44.40
45.44
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	$ 45.44
Options Outstanding at March 31, 2017 (in shares) \| shares	689
Weighted-Average Remaining Contractual Life (in years)	7 years 6 months 14 days
Weighted-Average Exercise Price (in dollars per share)	$ 45.44
Options Exercisable at March 31, 2017 (in shares) \| shares	363
Weighted- Average Exercise Price (in dollars per share)	$ 45.44
46.59 - 55.58
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	46.59
Range of Exercise Prices, upper range limit (in dollars per share)	$ 55.58
Options Outstanding at March 31, 2017 (in shares) \| shares	250
Weighted-Average Remaining Contractual Life (in years)	6 years 9 months 3 days
Weighted-Average Exercise Price (in dollars per share)	$ 49.89
Options Exercisable at March 31, 2017 (in shares) \| shares	192
Weighted- Average Exercise Price (in dollars per share)	$ 50.31
56.57
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	$ 56.57
Options Outstanding at March 31, 2017 (in shares) \| shares	650
Weighted-Average Remaining Contractual Life (in years)	5 years 6 months 10 days
Weighted-Average Exercise Price (in dollars per share)	$ 56.57
Options Exercisable at March 31, 2017 (in shares) \| shares	650
Weighted- Average Exercise Price (in dollars per share)	$ 56.57
58.25 - 87.20
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Range of Exercise Prices, lower range limit (in dollars per share)	58.25
Range of Exercise Prices, upper range limit (in dollars per share)	$ 87.20
Options Outstanding at March 31, 2017 (in shares) \| shares	1,040
Weighted-Average Remaining Contractual Life (in years)	6 years 5 months 1 day
Weighted-Average Exercise Price (in dollars per share)	$ 84.11
Options Exercisable at March 31, 2017 (in shares) \| shares	894
Weighted- Average Exercise Price (in dollars per share)	$ 83.80

Stock Plans - Restricted Stock Unit Activity (Detail) - Restricted Stock Units - $ / shares shares in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Number of Awards
Number of Awards, Non-vested beginning balance (in shares)	2,212	1,412	1,202
Number of Awards, Granted (in shares)	1,333	1,543	815
Number of Awards, Vested (in shares)	(975)	(547)	(491)
Number of Awards, Forfeited (in shares)	(174)	(196)	(114)
Number of Awards, Non-vested ending balance (in shares)	2,396	2,212	1,412
Weighted Average Grant Date Fair Value
Weighted Average grant Date Fair Value, Non-vested beginning balance (in dollars per share)	$ 43.43	$ 56.82	$ 65.63
Weighted Average grant Date Fair Value, Granted (in dollars per share)	50.66	37.27	46.62
Weighted Average grant Date Fair Value, Vested (in dollars per share)	51.35	38.38	59.22
Weighted Average grant Date Fair Value, Forfeited (in dollars per share)	43.56	49.24	63.70
Weighted Average grant Date Fair Value, Non-vested ending balance (in dollars per share)	$ 45.53	$ 43.43	$ 56.82

Stock Plans - Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 73,928	$ 64,196	$ 60,663
Cost of services revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,925	3,106	2,930
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	34,005	28,557	26,853
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	7,335	6,722	5,908
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 28,663	$ 25,811	$ 24,972

Stock Plans - Performance-based and Market-based Awards (Details)	12 Months Ended
	Mar. 31, 2017 tranche $ / shares shares
PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards, granted (in shares)	115,000
Number of annual tranches \| tranche	3
Maximum potential for awards to vest (as a percent)	200.00%
Maximum number of awards to vest (in shares)	230,000
Estimated number of awards to vest (in shares)	132.00%
Stock options granted, vesting period (in years)	3 years
Market performance shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of awards, granted (in shares)	123,000
Number of annual tranches \| tranche	3
Maximum potential for awards to vest (as a percent)	200.00%
Maximum number of awards to vest (in shares)	246,000
Stock options granted, vesting period (in years)	3 years
Weighted average grant date fair value, granted (in dollars per share) \| $ / shares	$ 57.28

Stock Plans - Employee Stock Purchase Plan (Details) - USD ($) shares in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 73,928,000	$ 64,196,000	$ 60,663,000
Unrecognized stock-based compensation expense	$ 95,364,000
Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price as a percentage of fair market value	85.00%
Length of offering period (in months)	6 months
Maximum employee payroll percent deduction of salary (as a percent)	10.00%
Maximum amount of stock purchasable by employees within a calendar year	$ 25,000
Number of shares purchased by employees (in shares)	243	263
Proceeds received	$ 8,634,000	$ 8,116,000
Compensation expense	2,620,000	$ 2,418,000	$ 2,960,000
Unrecognized stock-based compensation expense	$ 1,014,000

Income Taxes - Components of Income Before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Domestic	$ (7,698)	$ (6,869)	$ 28,048
Foreign	7,175	8,714	10,844
Income (loss) before income taxes	$ (523)	$ 1,845	$ 38,892

Income Taxes - Components of Income Tax Expense (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Current:
Federal	$ 6,138	$ 4,983	$ 1,777
State	(977)	1,076	2,533
Foreign	4,818	4,982	4,791
Deferred:
Federal	(11,144)	(9,171)	4,237
State	(56)	324	(24)
Foreign	158	(485)	(72)
Income tax expense (benefit)	$ (1,063)	$ 1,709	$ 13,242

Income Taxes - Reconciliation of Statutory Tax Rates and Effective Tax Rates (Detail)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory federal income tax expense (benefit) rate	35.00%	35.00%	35.00%
State and local income tax expense, net of federal income tax effect	(11.20%)	11.20%	3.00%
Impact of limit on executive compensation	0.00%	0.00%	3.20%
Foreign earnings taxed at different rates	(501.20%)	67.90%	1.00%
Domestic permanent differences	(368.40%)	116.80%	4.10%
Foreign tax credits	258.20%	(54.10%)	(2.80%)
Research credits	622.20%	(141.20%)	(4.90%)
Tax reserves	(15.60%)	8.70%	(5.30%)
Valuation allowance	121.40%	50.10%	0.00%
Statutory tax rate changes	(60.80%)	(20.10%)	(0.00%)
Other differences, net	123.70%	18.30%	0.70%
Effective income tax expense (benefit)	203.30%	92.60%	34.00%

Income Taxes - Components of Deferred Tax Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Deferred tax assets:
Stock-based compensation	$ 45,867	$ 40,033
Deferred revenue	11,810	12,496
Tax credits	12,810	6,970
Accrued expenses	1,249	1,155
Allowance for doubtful accounts and other reserves	601	753
Less: valuation allowance	(1,796)	(2,772)
Total deferred tax assets	70,541	58,635
Deferred tax liabilities:
Depreciation and amortization	(9,523)	(8,659)
Net deferred tax asset	$ 61,018	$ 49,976

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Tax Credit Carryforward [Line Items]
Valuation allowances against deferred tax assets	$ 1,796,000	$ 2,772,000
Cumulative unremitted foreign earnings	26,176,000
Tax benefits relating to share-based payments	3,682,000	3,265,000	$ 2,141,000
Federal Alternative Minimum Tax credit carryforwards	1,149,000
Unrecognized Tax Benefits
Unrecognized tax benefits which would favorably affect the effective tax rate once recognized	2,098,000	1,952,000	2,005,000	$ 4,113,000
Accrued interest and penalties	400,000
Remaining unrecognized tax benefits	0
New Jersey
Tax Credit Carryforward [Line Items]
Valuation allowances against deferred tax assets	1,796,000
Decrease to valuation allowances against deferred tax assets	976,000
Unrecognized Tax Benefits
Unrecognized tax benefits which would favorably affect the effective tax rate once recognized	2,098,000
Interest and penalties	61,000	$ 52,000	$ 224,000
New Jersey \| Other Liabilities
Unrecognized Tax Benefits
Unrecognized tax benefits which would favorably affect the effective tax rate once recognized	1,950,000
Accrued interest and penalties	287,000
New Jersey \| Deferred Tax Assets
Unrecognized Tax Benefits
Unrecognized tax benefits which would favorably affect the effective tax rate once recognized	548,000
Accrued interest and penalties	113,000
Research Tax Credit Carryforward \| U.S. Federal
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 3,253,000
Research Tax Credit Carryforward \| U.S. Federal \| Minimum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration year	2025
Research Tax Credit Carryforward \| U.S. Federal \| Maximum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration year	2036
Research Tax Credit Carryforward \| New Jersey
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	$ 3,175,000
Research Tax Credit Carryforward \| New Jersey \| Minimum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration year	2017
Research Tax Credit Carryforward \| New Jersey \| Maximum
Tax Credit Carryforward [Line Items]
Tax credit carryforward, expiration year	2023

Income Taxes - Schedule of Tax Years Subject to Income Tax Examination (Detail)	12 Months Ended
	Mar. 31, 2017
U.S. Federal \| Minimum
Income Tax Examination [Line Items]
Tax Years Subject to Income Tax Examination	2013
U.S. Federal \| Maximum
Income Tax Examination [Line Items]
Tax Years Subject to Income Tax Examination	2017
New Jersey \| Minimum
Income Tax Examination [Line Items]
Tax Years Subject to Income Tax Examination	2012
New Jersey \| Maximum
Income Tax Examination [Line Items]
Tax Years Subject to Income Tax Examination	2017
Foreign jurisdictions \| Minimum
Income Tax Examination [Line Items]
Tax Years Subject to Income Tax Examination	2012
Foreign jurisdictions \| Maximum
Income Tax Examination [Line Items]
Tax Years Subject to Income Tax Examination	2017

Income Taxes - Reconciliation of Amounts of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 1,952	$ 2,005	$ 4,113
Additions for tax positions related to current fiscal period	0	0	490
Additions for tax positions related to prior years	179	170	252
Settlements and effective settlements with tax authorities and remeasurements	0	(171)	(2,838)
Reductions related to the expiration of statutes of limitations	0	(64)	0
Decrease resulting from foreign currency translation adjustment	(33)		(12)
Increase resulting from foreign currency translation adjustment		12
Ending balance	$ 2,098	$ 1,952	$ 2,005

Employee Benefit Plan - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Company contributions to defined contribution plan	$ 2,998	$ 2,047	$ 1,955

Segment Information - Additional Information (Detail) - segment	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Number of reportable segments	1
Percentage of revenues below which countries other than the U.S. account for	10.00%	10.00%	10.00%
United States
Segment Reporting Information [Line Items]
Percentage of long-lived assets	10.00%	10.00%

Segment Information - Schedule of Revenue by Geographic Area (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue	$ 172,931	$ 165,841	$ 159,333	$ 152,413	$ 159,565	$ 155,696	$ 140,742	$ 139,123	$ 650,518	$ 595,126	$ 607,543
United States
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									367,423	343,015	344,931
Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenue									$ 283,095	$ 252,111	$ 262,612

Segment Information - Schedule of Long-Lived Assets by Geographic Area (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Mar. 31, 2016
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 139,592	$ 142,641
United States
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	131,083	135,562
Other
Segment Reporting, Asset Reconciling Item [Line Items]
Long-lived assets	$ 8,509	$ 7,079

Selected Quarterly Financial Data (unaudited) (Detail) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

12 Months Ended

Mar. 31, 2017

Dec. 31, 2016

Sep. 30, 2016

Jun. 30, 2016

Mar. 31, 2016

Dec. 31, 2015

Sep. 30, 2015

Jun. 30, 2015

Mar. 31, 2017

Mar. 31, 2016

Mar. 31, 2015

Quarterly Financial Information Disclosure [Abstract]

Total revenue

$ 172,931

$ 165,841

$ 159,333

$ 152,413

$ 159,565

$ 155,696

$ 140,742

$ 139,123

$ 650,518

$ 595,126

$ 607,543

Gross margin

151,557

144,675

137,676

131,418

138,768

135,267

119,803

118,576

565,326

512,414

525,475

Net income (loss)

$ 3,188

$ (42)

$ (562)

$ (2,044)

$ 5,794

$ 4,878

$ (9,236)

$ (1,300)

$ 540

$ 136

$ 25,650

Net income (loss) per common share:

Basic (in dollars per share)

$ 0.07

^[1]

$ 0.00

^[1]

$ (0.01)

^[1]

$ (0.05)

^[1]

$ 0.13

^[1]

$ 0.11

^[1]

$ (0.20)

^[1]

$ (0.03)

^[1]

$ 0.01

$ 0.00

$ 0.56

Diluted (in dollars per share)

$ 0.07

^[1]

$ 0.00

^[1]

$ (0.01)

^[1]

$ (0.05)

^[1]

$ 0.13

^[1]

$ 0.10

^[1]

$ (0.20)

^[1]

$ (0.03)

^[1]

$ 0.01

$ 0.00

$ 0.54

[1]	Per common share amounts for the quarters and full year have been calculated separately. Accordingly, quarterly amounts do not add to the annual amount because of differences in the weighted average common shares outstanding during each period used in the basic and diluted calculations.

Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 315	$ 104	$ 111
Charged (Credited) to Costs and Expenses	(161)	247	1
Deductions	51	36	8
Balance at End of Year	103	315	104
Valuation allowance for deferred taxes
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	2,772	1,343	1,382
Charged (Credited) to Costs and Expenses	(976)	1,429	(39)
Deductions	0	0	0
Balance at End of Year	$ 1,796	$ 2,772	$ 1,343