Commvault Systems (CVLT) 10-Q 31 Oct 13 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
	Sep. 30, 2013	Oct. 25, 2013
Document Information [Line Items]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
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	'
Entity Common Stock, Shares Outstanding	'	47,282,467

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$462,167	$433,964
Short-term investments	22,982	1,948
Trade accounts receivable, less allowance for doubtful accounts of $111 at September 30, 2013 and $103 at March 31, 2013	86,785	85,033
Prepaid expenses and other current assets	13,154	15,225
Deferred tax assets, net	21,698	19,328
Total current assets	606,786	555,498
Deferred tax assets, net	23,761	21,166
Property and equipment, net	50,919	21,112
Other assets	6,845	7,078
Total assets	688,311	604,854
Current liabilities:	'	'
Accounts payable	4,129	3,860
Accrued liabilities	54,841	55,577
Deferred revenue	157,103	152,967
Total current liabilities	216,073	212,404
Deferred revenue, less current portion	34,117	31,303
Other liabilities	7,203	7,130
Commitments and contingencies (Note 5)	'	'
Stockholders' equity:	'	'
Preferred stock, $0.01 par value: 50,000 shares authorized, no shares issued and outstanding at September 30, 2013 and March 31, 2013	'	'
Common stock, $0.01 par value: 250,000 shares authorized, 47,075 shares and 46,397 shares issued and outstanding at September 30, 2013 and March 31, 2013, respectively	471	464
Additional paid-in capital	438,622	391,772
Accumulated deficit	-7,114	-37,930
Accumulated other comprehensive loss	-1,061	-289
Total stockholders' equity	430,918	354,017
Total liabilities and stockholders' equity	$688,311	$604,854

Consolidated_Balance_Sheets_Pa

Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Thousands, except Per Share data, unless otherwise specified
Allowance for doubtful trade accounts receivable	$111	$103
Preferred stock, par value	$0.01	$0.01
Preferred stock, shares authorized	50,000	50,000
Preferred stock, shares issued	'	'
Preferred stock, shares outstanding	'	'
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	250,000	250,000
Common stock, shares issued	47,075	46,397
Common stock, shares outstanding	47,075	46,397

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:	'	'	'	'
Software	$70,831	$59,219	$136,130	$113,454
Services	71,032	58,943	140,141	115,975
Total revenues	141,863	118,162	276,271	229,429
Cost of revenues:	'	'	'	'
Software	636	644	1,291	1,322
Services	17,520	14,699	34,643	29,311
Total cost of revenues	18,156	15,343	35,934	30,633
Gross margin	123,707	102,819	240,337	198,796
Operating expenses:	'	'	'	'
Sales and marketing	67,147	55,700	134,348	112,087
Research and development	13,344	11,431	26,195	22,382
General and administrative	15,298	12,161	29,026	23,251
Depreciation and amortization	1,498	1,174	2,951	2,307
Income from operations	26,420	22,353	47,817	38,769
Interest income	213	261	455	497
Income before income taxes	26,633	22,614	48,272	39,266
Income tax expense	9,279	8,715	17,456	15,242
Net income	$17,354	$13,899	$30,816	$24,024
Net income per common share:	'	'	'	'
Basic	$0.37	$0.31	$0.66	$0.53
Diluted	$0.35	$0.29	$0.62	$0.50
Weighted average common shares outstanding:	'	'	'	'
Basic	46,910	45,106	46,727	44,934
Diluted	49,745	47,815	49,533	47,720

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$17,354	$13,899	$30,816	$24,024
Other comprehensive income (loss):	'	'	'	'
Foreign currency translation adjustment	844	888	-772	366
Comprehensive income	$18,198	$14,787	$30,044	$24,390

Consolidated_Statement_of_Stoc

Consolidated Statement of Stockholders' Equity (USD $)	Total	Common Stock	Additional Paid - In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
In Thousands
Beginning Balance at Mar. 31, 2013	$354,017	$464	$391,772	($37,930)	($289)
Beginning Balance (in shares) at Mar. 31, 2013	'	46,397	'	'	'
Stock-based compensation, net	20,290	'	20,290	'	'
Tax benefits relating to stock-based payments	16,897	'	16,897	'	'
Exercise of common stock options and vesting of restricted stock units (in shares)	'	678	'	'	'
Exercise of common stock options and vesting of restricted stock units	9,670	7	9,663	'	'
Net income	30,816	'	'	30,816	'
Foreign currency translation adjustment	-772	'	'	'	-772
Ending Balance at Sep. 30, 2013	$430,918	$471	$438,622	($7,114)	($1,061)
Ending Balance (in shares) at Sep. 30, 2013	'	47,075	'	'	'

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities	'	'
Net income	$30,816	$24,024
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	3,017	2,361
Noncash stock-based compensation	20,290	12,077
Excess tax benefits from stock-based compensation	-16,843	-7,287
Deferred income taxes	-1,208	2,816
Changes in operating assets and liabilities:	'	'
Trade accounts receivable	-1,402	-1,618
Prepaid expenses and other current assets	2,108	795
Other assets	197	-1,704
Accounts payable	-138	509
Accrued liabilities	5,524	2,819
Deferred revenue	6,760	7,371
Other liabilities	-65	180
Net cash provided by operating activities	49,056	42,343
Cash flows from investing activities	'	'
Purchase of short-term investments	-22,982	-1,948
Proceeds from maturity of short-term investments	1,948	3,146
Purchases for corporate campus headquarters	-23,872	-612
Purchase of property and equipment	-2,586	-2,742
Net cash used in investing activities	-47,492	-2,156
Cash flows from financing activities	'	'
Proceeds from the exercise of stock options	9,670	7,196
Excess tax benefits from stock-based compensation	16,843	7,287
Net cash provided by financing activities	26,513	14,483
Effects of exchange rate - changes in cash	126	227
Net increase in cash and cash equivalents	28,203	54,897
Cash and cash equivalents at beginning of period	433,964	297,088
Cash and cash equivalents at end of period	462,167	351,985
Supplemental disclosures of cash flow information	'	'
Purchases for corporate campus headquarters in accounts payable and accrued expenses	$6,369	'

Basis_of_Presentation

Basis of Presentation	6 Months Ended
	Sep. 30, 2013
Basis of Presentation	'
	1	Basis of Presentation
	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 high-performance data protection, including backup and recovery; data migration and archiving; snapshot management and replication of data; integrated source, and target data deduplication; eDiscovery and compliance solutions; self-service access; a secure virtual repository using Simpana ContentStore; enterprise-wide search capabilities; protection, recovery and discovery of data in virtual server environments; and robust built-in analytics and troubleshooting tools. The Company’s unified suite of data and information management software applications, which is sold under the Simpana brand, shares an underlying architecture that has been developed to minimize the cost and complexity of managing data on globally distributed and networked storage infrastructures. The Company also provides its customers with a broad range of professional and customer support services.
	The consolidated financial statements as of September 30, 2013 and for the three and six months ended September 30, 2013 and 2012 are unaudited, and in the opinion of management, include all adjustments (consisting only of normal recurring adjustments) necessary for a fair presentation of the results for the interim periods. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles (“U.S. GAAP”) for complete financial statements and should be read in conjunction with the financial statements and notes in the Company’s Annual Report on Form 10-K for fiscal 2013. The results reported in these financial statements should not necessarily be taken as indicative of results that may be expected for the entire fiscal year.
	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 and stock-based compensation. Actual results could differ from those estimates.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	6 Months Ended
	Sep. 30, 2013
Summary of Significant Accounting Policies	'
	2	Summary of Significant Accounting Policies
	There have been no significant changes in the Company’s accounting policies during the six months ended September 30, 2013 as compared to the significant accounting policies described in its Annual Report on Form 10-K for the fiscal year ended March 31, 2013.
	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 software 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-copy basis, on a capacity basis or as site licenses. 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. 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. Under the sell-through model the Company recognizes 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, assessment and design services, installation services and training. 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, assessment and design services and installation 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, assessment and design services and installation services are based upon a daily or weekly rate and are recognized when the services are completed. Training includes 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. Training fees are recognized as revenue after the training 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.
		•		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.
	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, as well as billings for other professional services fees that have not yet been performed by the Company and billings for license fees that are deferred due to one 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:
			September 30, 2013		March 31, 2013
	Current:
	Deferred software revenue		$	4,700	$	9,193
	Deferred services revenue			152,403		143,774
			$	157,103	$	152,967
	Non-current:
	Deferred services revenue		$	34,117	$	31,303
	Total Deferred Revenue		$	191,220	$	184,270
	Cash and Cash Equivalents
	The Company considers all liquid investments with maturities of three months or less at the date of purchase to be cash equivalents. As of September 30, 2013, the Company’s cash equivalents consisted of money market funds and US Treasury Bills.
	Short-term Investments
	Short-term investments consist of investments with maturities of twelve months or less that do not meet the criteria of 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 and purchase of investments are classified as investing activities in the Company’s Consolidated Statements of Cash Flows.
	Fair Value of Financial Instruments
	The carrying amounts of the Company’s cash and cash equivalents, short-term investments, accounts receivable and accounts payable approximate their fair values due to the short-term maturity of these instruments. As of September 30, 2013, the Company’s short-term investments balance consisted of US 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 tables summarize the fair value of the Company’s financial assets measured at fair value at September 30, 2013 and March 31, 2013:
	30-Sep-13		Level 1		Level 2		Level 3		Total
	Cash equivalents		$	359,427	$	2,000		—	$	361,427
	Short-term Investments			—	$	22,999		—	$	22,999
	31-Mar-13		Level 1		Level 2		Level 3		Total
	Cash equivalents		$	342,458		—		—	$	342,458
	Short-term Investments		$	1,948		—		—	$	1,948
	Valuations of level 2 instruments can be verified to quoted prices, recent trading activity for identical or similar instruments, or broker or dealer quotations. There were no transfers between levels in any periods presented.
	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 have historically not been significant.
	Sales through the Company’s reseller and original equipment manufacturer agreements with Dell Inc. (“Dell”) totaled 20% and 21% of total revenues for the six months ended September 30, 2013 and 2012, respectively. Dell accounted for 12% and 23% of accounts receivable as of September 30, 2013 and March 31, 2013, respectively.
	Sales through the Company’s distribution agreement with Arrow Enterprise Computing Solutions, Inc. (“Arrow”) totaled 31% and 28% of total revenues for the six months ended September 30, 2013 and 2012, respectively. Arrow accounted for approximately 43% and 39% of total accounts receivable as of September 30, 2013 and March 31, 2013, respectively.
	Recently Issued Accounting Standards
	In February 2013, the FASB issued ASU No. 2013-02, “Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” This amendment requires an entity to present, either on the face of the financial statement or in the notes, the effects on the line items of net income due to significant amounts reclassified out of accumulated other comprehensive income, as well as provide cross-references to other required reclassification disclosures, where applicable. The adoption of the new pronouncement on April 1, 2013 did not have an impact on the Company’s consolidated financial position, results of operations or cash flows. There have been no amounts reclassified out of accumulated other comprehensive income in any periods presented.
	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

Property and Equipment	6 Months Ended
	Sep. 30, 2013
Property and Equipment	'
	3	Property and Equipment
	Property and equipment consist of the following:
			September 30,			March 31,
			2013			2013
	Computers, servers and other equipment		$	27,349		$	25,513
	Construction in process			40,404			10,162
	Leasehold improvements			8,617			8,279
	Furniture and fixtures			2,319			2,183
	Purchased software			2,018			1,970
				80,707			48,107
	Less: Accumulated depreciation and amortization			(29,788	)		(26,995	)
			$	50,919		$	21,112
	Construction in process at September 30, 2013 is comprised of the purchase of land and related design and construction cost for the Company’s planned corporate campus headquarters, which the Company expects to finalize over approximately the next 14-20 months. The cost of land included in construction in process at September 30, 2013 is $5,915.

Net_Income_per_Common_Share

Net Income per Common Share	6 Months Ended
	Sep. 30, 2013
Net Income per Common Share	'
	4	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 and the vesting of restricted stock units. 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:
			Three Months Ended				Six Months Ended
			September 30,				September 30,
			2013		2012		2013		2012
	Net income		$	17,354	$	13,899	$	30,816	$	24,024
	Basic net income per common share:
	Basic weighted average shares outstanding			46,910		45,106		46,727		44,934
	Basic net income per common share		$	0.37	$	0.31	$	0.66	$	0.53
	Diluted net income per common share:
	Basic weighted average shares outstanding			46,910		45,106		46,727		44,934
	Dilutive effect of stock options and restricted stock units			2,835		2,709		2,806		2,786
	Diluted weighted average shares outstanding			49,745		47,815		49,533		47,720
	Diluted net income per common share		$	0.35	$	0.29	$	0.62	$	0.5
	The diluted weighted average shares outstanding in the table above exclude outstanding stock options and restricted stock units totaling approximately 316 and 1,144 for the three months ended September 30, 2013 and 2012, respectively, and 311 and 1,085 for the six months ended September 30, 2013 and 2012, respectively, because the effect would have been anti-dilutive.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Sep. 30, 2013
Commitments and Contingencies	'
	5	Commitments and Contingencies
	In the normal course of its business, the Company may be involved in various claims, negotiations and legal actions. As of September 30, 2013, the Company is not aware of any asserted or unasserted claims, negotiations and legal actions for which a loss is considered reasonably possible.

Capitalization

Capitalization	6 Months Ended
	Sep. 30, 2013
Capitalization	'
	6	Capitalization
	As of September 30, 2013 the Company has repurchased approximately $117,157 of common stock under the stock repurchase authorization and may repurchase an additional $102,843 of its common stock under the current program through March 31, 2014. The Company did not repurchase any shares during the six months ended September 30, 2013.

Stock_Plans

Stock Plans	6 Months Ended
	Sep. 30, 2013
Stock Plans	'
	7	Stock Plans
	The following summarizes the activity by award type for the Company’s two stock incentive plans, the 1996 Stock Option Plan and the 2006 Long-Term Stock Incentive Plan, for the six months ended September 30, 2013:
	Options		Number			Weighted-			Weighted-		Aggregate
			of			Average			Average		Intrinsic
			Options			Exercise			Remaining		Value
						Price			Contractual
									Term
									(Years)
	Outstanding as of March 31, 2013			6,439		$	28.31
	Options granted			41			76.02
	Options exercised			(510	)		18.97
	Options forfeited			(46	)		44.42
	Options expired			—			—
	Outstanding as of September 30, 2013			5,924		$	29.32			5.98	$	347,154
	Vested or expected to vest as of September 30, 2013			5,846		$	28.73			5.91	$	344,692
	Exercisable as of September 30, 2013			3,681		$	16.7			4.46	$	262,186
	The weighted average fair value of stock options granted was $32.48 per option and $29.32 per option during the three and six months ended September 30, 2013, respectively, and $20.12 per option and $20.34 per option during the three and six months ended September 30, 2012, respectively. The total intrinsic value of options exercised was $6,613 and $9,670 as of the three and six months ended September 30, 2013, respectively, and $13,368 and $21,677 as of the three and six months ended September 30, 2012, respectively. The Company’s policy is to issue new shares upon exercise of options as the Company does not hold shares in treasury.
	The assumptions used in the Black-Scholes option-pricing model are as follows:
			Three Months Ended September 30,			Six Months Ended September 30,
			2013		2012	2013		2012
	Dividend yield		None		None	None		None
	Expected volatility		44%-45%		46%-48%	44%-47%		45%-48%
	Weighted average expected volatility		44%		47%	45%		47%
	Risk-free interest rates		1.43%-1.65%		0.60%-0.97%	0.70%-1.65%		0.60%-0.97%
	Weighted average expected life (in years)		4.6		5.7	4.6		5.5
	Restricted stock unit activity for the six months ended September 30, 2013 is as follows:
	Non-vested Restricted Stock Units		Number of			Weighted
			Awards			Average Grant
						Date Fair Value
	Non-vested as of March 31, 2013			1,198		$	46.45
	Awarded			51			78.42
	Vested			(168	)		32.84
	Forfeited			(44	)		47.34
	Non-vested as of September 30, 2013			1,037		$	50.2
	The weighted average fair value of restricted stock units awarded was $84.85 per unit and $78.42 per unit during the three and six months ended September 30, 2013, respectively, and $47.83 per unit and $48.94 per unit during the three and six months ended September 30, 2012.
	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 three and six months ended September 30, 2013 and 2012.
			Three Months Ended September 30,						Six Months Ended September 30,
			2013			2012			2013		2012
	Cost of services revenue		$	293		$	195		$	591	$	379
	Sales and marketing			4,085			2,786			8,346		5,422
	Research and development			939			638			1,896		1,262
	General and administrative			5,465			2,530			9,457		5,014
	Stock-based compensation expense		$	10,782		$	6,149		$	20,290	$	12,077
	As of September 30, 2013, there was approximately $77,935 of unrecognized stock-based compensation expense, net of estimated forfeitures, related to non-vested stock option and restricted stock unit awards that is expected to be recognized over a weighted average period of 2.34 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.

Income_Taxes

Income Taxes	6 Months Ended
	Sep. 30, 2013
Income Taxes	'
	8	Income Taxes
	Income Tax Expense
	Income tax expense was $9,279 and $17,456 in the three and six months ended September 30, 2013, respectively with an effective tax rate of 35% and 36% in the three and six months ended September 30, 2013, respectively. The effective rate in the three and six months ended September 30, 2013 approximates the federal statutory rate but is impacted by state income taxes and permanent differences in both the United States and foreign jurisdictions partially offset by income tax benefits from research and development tax credits, foreign tax credits, and domestic production activities deductions.
	The provision for income taxes for the three and six months ended September 30, 2012 was $8,715 and $15,242 respectively, with effective tax rates of 39% in the three and six months ended September 30, 2012. The effective rate in the three and six months ended September 30, 2012 is higher than the expected federal statutory rate of 35% primarily due to state income taxes and permanent differences in both the United States and foreign jurisdictions partially offset by income tax benefits from foreign tax credits and domestic production activities deductions.
	Unrecognized Tax Benefits
	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. A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows:
	Balance at March 31, 2013		$	4,570
	Additions for tax positions related to fiscal 2014			205
	Additions for tax positions related to prior years			—
	Settlements			—
	Reductions related to the expiration of statutes of limitations			—
	Foreign currency translation adjustment			48
	Balance at September 30, 2013		$	4,823
	All of the Company’s unrecognized tax benefits at September 30, 2013 of $4,823, if recognized, would favorably impact 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. Accordingly, the Company has recorded its unrecognized tax benefits of $4,823 and $4,570 and the related accrued interest and penalties of $930 and $842 in Other Liabilities on the Consolidated Balance Sheet at September 30, 2013 and March 31, 2013, respectively. Interest and penalties related to unrecognized tax benefits are recorded in income tax expense.
	Other Tax Items
	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 as the United States, Australia, Canada, Germany, Netherlands and United Kingdom. The Company’s U.S. Federal income tax return for the fiscal year ended March 31, 2011 is currently under audit by the U.S. Internal Revenue Service. In addition, the Company’s German subsidiary’s income tax returns for the fiscal years ended March 31, 2006 through March 31, 2010 are currently under audit by the German tax authorities. We believe that it is reasonably possible that approximately $0.1 million of our currently remaining unrecognized tax benefits and approximately less than $0.1 million of related accrued interest and penalties may be realized by the end of fiscal 2014 as a result of the lapse of the statute of limitations.

Subsequent_Events

Subsequent Events	6 Months Ended
	Sep. 30, 2013
Subsequent Events	'
	9	Subsequent Events
	On October 24, 2013, the Company’s Board of Directors authorized a $47,157 increase to the Company’s existing stock repurchase program and extended the expiration of the stock repurchase program to March 31, 2015. As of October 31, 2013, the Company has repurchased $117,157 of common stock out of the $267,157 in total that is now authorized under its stock repurchase program. As a result, the Company may repurchase an additional $150,000 of its common stock through March 31, 2015.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Sep. 30, 2013
Revenue Recognition	'
	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 software 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-copy basis, on a capacity basis or as site licenses. 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. 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. Under the sell-through model the Company recognizes 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, assessment and design services, installation services and training. 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, assessment and design services and installation 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, assessment and design services and installation services are based upon a daily or weekly rate and are recognized when the services are completed. Training includes 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. Training fees are recognized as revenue after the training 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.
		•		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.
Deferred Revenue	'
	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, as well as billings for other professional services fees that have not yet been performed by the Company and billings for license fees that are deferred due to one 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:
			September 30, 2013		March 31, 2013
	Current:
	Deferred software revenue		$	4,700	$	9,193
	Deferred services revenue			152,403		143,774
			$	157,103	$	152,967
	Non-current:
	Deferred services revenue		$	34,117	$	31,303
	Total Deferred Revenue		$	191,220	$	184,270
Cash and Cash Equivalents	'
	Cash and Cash Equivalents
	The Company considers all liquid investments with maturities of three months or less at the date of purchase to be cash equivalents. As of September 30, 2013, the Company’s cash equivalents consisted of money market funds and US Treasury Bills.
Short-term Investments	'
	Short-term Investments
	Short-term investments consist of investments with maturities of twelve months or less that do not meet the criteria of 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 and purchase of investments are classified as investing activities in the Company’s Consolidated Statements of Cash Flows.
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments
	The carrying amounts of the Company’s cash and cash equivalents, short-term investments, accounts receivable and accounts payable approximate their fair values due to the short-term maturity of these instruments. As of September 30, 2013, the Company’s short-term investments balance consisted of US 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 tables summarize the fair value of the Company’s financial assets measured at fair value at September 30, 2013 and March 31, 2013:
	30-Sep-13		Level 1		Level 2		Level 3		Total
	Cash equivalents		$	359,427	$	2,000		—	$	361,427
	Short-term Investments			—	$	22,999		—	$	22,999
	31-Mar-13		Level 1		Level 2		Level 3		Total
	Cash equivalents		$	342,458		—		—	$	342,458
	Short-term Investments		$	1,948		—		—	$	1,948
	Valuations of level 2 instruments can be verified to quoted prices, recent trading activity for identical or similar instruments, or broker or dealer quotations. There were no transfers between levels in any periods presented.
Concentration of Credit Risk	'
	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 have historically not been significant.
	Sales through the Company’s reseller and original equipment manufacturer agreements with Dell Inc. (“Dell”) totaled 20% and 21% of total revenues for the six months ended September 30, 2013 and 2012, respectively. Dell accounted for 12% and 23% of accounts receivable as of September 30, 2013 and March 31, 2013, respectively.
	Sales through the Company’s distribution agreement with Arrow Enterprise Computing Solutions, Inc. (“Arrow”) totaled 31% and 28% of total revenues for the six months ended September 30, 2013 and 2012, respectively. Arrow accounted for approximately 43% and 39% of total accounts receivable as of September 30, 2013 and March 31, 2013, respectively.
Recently Issued Accounting Standards	'
	Recently Issued Accounting Standards
	In February 2013, the FASB issued ASU No. 2013-02, “Comprehensive Income (Topic 220): Reporting of Amounts Reclassified Out of Accumulated Other Comprehensive Income.” This amendment requires an entity to present, either on the face of the financial statement or in the notes, the effects on the line items of net income due to significant amounts reclassified out of accumulated other comprehensive income, as well as provide cross-references to other required reclassification disclosures, where applicable. The adoption of the new pronouncement on April 1, 2013 did not have an impact on the Company’s consolidated financial position, results of operations or cash flows. There have been no amounts reclassified out of accumulated other comprehensive income in any periods presented.
	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.

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Sep. 30, 2013
Deferred Revenue	'
	Deferred revenue consists of the following:
		September 30, 2013		March 31, 2013
	Current:
	Deferred software revenue	$	4,700	$	9,193
	Deferred services revenue		152,403		143,774
		$	157,103	$	152,967
	Non-current:
	Deferred services revenue	$	34,117	$	31,303
	Total Deferred Revenue	$	191,220	$	184,270
Financial Assets Measured at Fair Value	'
	The following tables summarize the fair value of the Company’s financial assets measured at fair value at September 30, 2013 and March 31, 2013:
	30-Sep-13	Level 1		Level 2		Level 3		Total
	Cash equivalents	$	359,427	$	2,000		—	$	361,427
	Short-term Investments		—	$	22,999		—	$	22,999
	31-Mar-13	Level 1		Level 2		Level 3		Total
	Cash equivalents	$	342,458		—		—	$	342,458
	Short-term Investments	$	1,948		—		—	$	1,948

Property_and_Equipment_Tables

Property and Equipment (Tables)	6 Months Ended
	Sep. 30, 2013
Property and Equipment	'
	Property and equipment consist of the following:
		September 30,			March 31,
		2013			2013
	Computers, servers and other equipment	$	27,349		$	25,513
	Construction in process		40,404			10,162
	Leasehold improvements		8,617			8,279
	Furniture and fixtures		2,319			2,183
	Purchased software		2,018			1,970
			80,707			48,107
	Less: Accumulated depreciation and amortization		(29,788	)		(26,995	)
		$	50,919		$	21,112

Net_Income_per_Common_Share_Ta

Net Income per Common Share (Tables)	6 Months Ended
	Sep. 30, 2013
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:
		Three Months Ended				Six Months Ended
		September 30,				September 30,
		2013		2012		2013		2012
	Net income	$	17,354	$	13,899	$	30,816	$	24,024
	Basic net income per common share:
	Basic weighted average shares outstanding		46,910		45,106		46,727		44,934
	Basic net income per common share	$	0.37	$	0.31	$	0.66	$	0.53
	Diluted net income per common share:
	Basic weighted average shares outstanding		46,910		45,106		46,727		44,934
	Dilutive effect of stock options and restricted stock units		2,835		2,709		2,806		2,786
	Diluted weighted average shares outstanding		49,745		47,815		49,533		47,720
	Diluted net income per common share	$	0.35	$	0.29	$	0.62	$	0.5

Stock_Plans_Tables

Stock Plans (Tables)	6 Months Ended
	Sep. 30, 2013
Schedule of Stock Option Activity	'
	The following summarizes the activity by award type for the Company’s two stock incentive plans, the 1996 Stock Option Plan and the 2006 Long-Term Stock Incentive Plan, for the six months ended September 30, 2013:
	Options	Number			Weighted-			Weighted-		Aggregate
		of			Average			Average		Intrinsic
		Options			Exercise			Remaining		Value
					Price			Contractual
								Term
								(Years)
	Outstanding as of March 31, 2013		6,439		$	28.31
	Options granted		41			76.02
	Options exercised		(510	)		18.97
	Options forfeited		(46	)		44.42
	Options expired		—			—
	Outstanding as of September 30, 2013		5,924		$	29.32			5.98	$	347,154
	Vested or expected to vest as of September 30, 2013		5,846		$	28.73			5.91	$	344,692
	Exercisable as of September 30, 2013		3,681		$	16.7			4.46	$	262,186
Schedule of Stock Option Valuation Assumptions	'
	The assumptions used in the Black-Scholes option-pricing model are as follows:
		Three Months Ended September 30,			Six Months Ended September 30,
		2013		2012	2013		2012
	Dividend yield	None		None	None		None
	Expected volatility	44%-45%		46%-48%	44%-47%		45%-48%
	Weighted average expected volatility	44%		47%	45%		47%
	Risk-free interest rates	1.43%-1.65%		0.60%-0.97%	0.70%-1.65%		0.60%-0.97%
	Weighted average expected life (in years)	4.6		5.7	4.6		5.5
Schedule of Restricted Stock Unit Activity	'
	Restricted stock unit activity for the six months ended September 30, 2013 is as follows:
	Non-vested Restricted Stock Units	Number of			Weighted
		Awards			Average Grant
					Date Fair Value
	Non-vested as of March 31, 2013		1,198		$	46.45
	Awarded		51			78.42
	Vested		(168	)		32.84
	Forfeited		(44	)		47.34
	Non-vested as of September 30, 2013		1,037		$	50.2
Stock-Based Compensation Expense	'
	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 three and six months ended September 30, 2013 and 2012.
		Three Months Ended September 30,						Six Months Ended September 30,
		2013			2012			2013		2012
	Cost of services revenue	$	293		$	195		$	591	$	379
	Sales and marketing		4,085			2,786			8,346		5,422
	Research and development		939			638			1,896		1,262
	General and administrative		5,465			2,530			9,457		5,014
	Stock-based compensation expense	$	10,782		$	6,149		$	20,290	$	12,077

Income_Taxes_Tables

Income Taxes (Tables)	6 Months Ended
	Sep. 30, 2013
Reconciliation of Amounts of Unrecognized Tax Benefits	'
	A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows:
	Balance at March 31, 2013	$	4,570
	Additions for tax positions related to fiscal 2014		205
	Additions for tax positions related to prior years		—
	Settlements		—
	Reductions related to the expiration of statutes of limitations		—
	Foreign currency translation adjustment		48
	Balance at September 30, 2013	$	4,823

Summary_of_Significant_Account3

Summary of Significant Accounting Policies - Additional Information (Detail)	6 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Sources of primary revenue	2	'	'
Length of customer support agreement - in years	1	'	'
Number of days for other professional services	90	'	'
Dell	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Percentage of sales in relation to total revenues through Company's reseller and original equipment manufacturer agreement	20.00%	21.00%	'
Percentage of accounts receivable	12.00%	'	23.00%
Arrow	'	'	'
Summary Of Significant Accounting Policies [Line Items]	'	'	'
Percentage of accounts receivable	43.00%	'	39.00%
Percentage of sales in relation to total revenues through Company's reseller agreement	31.00%	28.00%	'

Deferred_Revenue_Detail

Deferred Revenue (Detail) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue, Current	$157,103	$152,967
Deferred revenue, Non-current	34,117	31,303
Total Deferred Revenue	191,220	184,270
Deferred software revenue	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue, Current	4,700	9,193
Deferred services revenue	'	'
Deferred Revenue Arrangement [Line Items]	'	'
Deferred revenue, Current	152,403	143,774
Deferred revenue, Non-current	$34,117	$31,303

Financial_Assets_Measured_at_F

Financial Assets Measured at Fair Value (Detail) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	$361,427	$342,458
Short-term investments	22,999	1,948
Fair Value, Inputs, Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	359,427	342,458
Short-term investments	'	1,948
Fair Value, Inputs, Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'	'
Cash equivalents	2,000	'
Short-term investments	$22,999	'

Property_and_Equipment_Detail

Property and Equipment (Detail) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	$80,707	$48,107
Less: Accumulated depreciation and amortization	-29,788	-26,995
Property and equipment, net	50,919	21,112
Computers, servers and other equipment	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	27,349	25,513
Construction in process	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	40,404	10,162
Leasehold improvements	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	8,617	8,279
Furniture and fixtures	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	2,319	2,183
Purchased software	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, gross	$2,018	$1,970

Property_and_Equipment_Additio

Property and Equipment - Additional Information (Detail) (Construction in process, USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Construction in process	'
Property, Plant and Equipment [Line Items]	'
Cost of land	$5,915

Computation_of_Basic_and_Dilut

Computation of Basic and Diluted Net Income Per Common Share (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]	'	'	'	'
Net income	$17,354	$13,899	$30,816	$24,024
Basic net income per common share:	'	'	'	'
Basic weighted average shares outstanding	46,910	45,106	46,727	44,934
Basic net income per common share	$0.37	$0.31	$0.66	$0.53
Diluted net income per common share:	'	'	'	'
Basic weighted average shares outstanding	46,910	45,106	46,727	44,934
Dilutive effect of stock options and restricted stock units	2,835	2,709	2,806	2,786
Diluted weighted average shares outstanding	49,745	47,815	49,533	47,720
Diluted net income per common share	$0.35	$0.29	$0.62	$0.50

Net_Income_Per_Common_Share_Ad

Net Income Per Common Share - Additional Information (Detail)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Anti-dilutive securities exclude outstanding stock options and restricted stock units	316	1,144	311	1,085

Capitalization_Additional_Info

Capitalization - Additional Information (Detail) (Common Stock Repurchased, USD $)	6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Common Stock Repurchased	'
Class of Stock [Line Items]	'
Value of common stock repurchased under share repurchase program	$117,157
Remaining value of common stock to be repurchased under share repurchase program	$102,843
Share repurchase program expiration date	31-Mar-14

Activity_for_Companys_Two_Stoc

Activity for Company's Two Stock Incentive Plans (Detail) (USD $)	6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013
Number of Options	'
Outstanding beginning balance	6,439
Options granted	41
Options exercised	-510
Options forfeited	-46
Options expired	'
Outstanding ending balance	5,924
Vested or expected to vest as of September 30, 2013	5,846
Exercisable as of September 30, 2013	3,681
Weighted- Average Exercise Price	'
Outstanding beginning balance	$28.31
Options granted	$76.02
Options exercised	$18.97
Options forfeited	$44.42
Options expired	'
Outstanding ending balance	$29.32
Vested or expected to vest as of September 30, 2013	$28.73
Exercisable as of September 30, 2013	$16.70
Weighted- Average Remaining Contractual Term (Years)	'
Outstanding as of September 30, 2013	'5 years 11 months 23 days
Vested or expected to vest as of September 30, 2013	'5 years 10 months 28 days
Exercisable as of September 30, 2013	'4 years 5 months 16 days
Aggregate intrinsic value	'
Outstanding as of September 30, 2013	$347,154
Vested or expected to vest as of September 30, 2013	344,692
Exercisable as of September 30, 2013	$262,186

Stock_Plans_Additional_Informa

Stock Plans - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Weighted average fair value of stock options granted per share	$32.48	$20.12	$29.32	$20.34
Total intrinsic value of options exercised	$6,613	$13,368	$9,670	$21,677
Unrecognized stock-based compensation expense, net of estimated forfeitures	$77,935	'	$77,935	'
Awards expected to be recognized over a weighted average period	'	'	'2 years 4 months 2 days	'
Restricted Stock Units	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'
Weighted average fair value, units awarded	$84.85	$47.83	$78.42	$48.94

Assumptions_Used_in_BlackSchol

Assumptions Used in Black-Scholes Option-Pricing Model (Detail)	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Black-Scholes Option-Pricing Model Assumptions	'	'	'	'
Dividend yield	'	'	'	'
Expected volatility, minimum	44.00%	46.00%	44.00%	45.00%
Expected volatility, maximum	45.00%	48.00%	47.00%	48.00%
Weighted average expected volatility	44.00%	47.00%	45.00%	47.00%
Risk-free interest rates, minimum	1.43%	0.60%	0.70%	0.60%
Risk-free interest rates, maximum	1.65%	0.97%	1.65%	0.97%
Weighted average expected life (in years)	'4 years 7 months 6 days	'5 years 8 months 12 days	'4 years 7 months 6 days	'5 years 6 months

Restricted_Stock_Unit_Activity

Restricted Stock Unit Activity (Detail) (Restricted Stock Units, USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Restricted Stock Units	'	'	'	'
Number of Awards	'	'	'	'
Non-vested beginning balance	'	'	1,198	'
Awarded	'	'	51	'
Vested	'	'	-168	'
Forfeited	'	'	-44	'
Non-vested ending balance	1,037	'	1,037	'
Weighted Average Grant Date Fair Value	'	'	'	'
Non-vested beginning balance	'	'	$46.45	'
Awarded	$84.85	$47.83	$78.42	$48.94
Vested	'	'	$32.84	'
Forfeited	'	'	$47.34	'
Non-vested ending balance	$50.20	'	$50.20	'

StockBased_Compensation_Expens

Stock-Based Compensation Expense (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	$10,782	$6,149	$20,290	$12,077
Cost of services revenue	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	293	195	591	379
Sales and marketing	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	4,085	2,786	8,346	5,422
Research and development	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	939	638	1,896	1,262
General and administrative	'	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'	'
Stock-based compensation expense	$5,465	$2,530	$9,457	$5,014

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013
Tax Credit Carryforward [Line Items]	'	'	'	'	'
Income tax expense	$9,279	$8,715	$17,456	$15,242	'
Effective income tax rate	35.00%	39.00%	36.00%	39.00%	'
Expected federal statutory rate	'	35.00%	'	35.00%	'
Unrecognized tax benefits which would favorably impact the effective tax rate once recognized	4,823	'	4,823	'	4,570
Accrued interest and penalties	930	'	930	'	842
Reasonably possible amount of currently remaining unrecognized tax benefits	100	'	100	'	'
Maximum	'	'	'	'	'
Tax Credit Carryforward [Line Items]	'	'	'	'	'
Reasonably possible amount of currently remaining accrued interest and penalties	$100	'	$100	'	'

Reconciliation_of_Amounts_of_U

Reconciliation of Amounts of Unrecognized Tax Benefits (Detail) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Reconciliation of Unrecognized Tax Benefits [Line Items]	'
Beginning Balance	$4,570
Additions for tax positions related to fiscal 2014	205
Additions for tax positions related to prior years	'
Settlements	'
Reductions related to the expiration of statutes of limitations	'
Foreign currency translation adjustment	48
Ending Balance	$4,823

Subsequent_Event_Additional_In

Subsequent Event - Additional Information (Detail) (Common Stock Repurchased, USD $)	6 Months Ended	1 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Oct. 24, 2013	Oct. 31, 2013
		Subsequent Event	Subsequent Event
Subsequent Event [Line Items]	'	'	'
Increase in stock repurchase program authorized amount	'	$47,157	'
Value of common stock repurchased under the share repurchase program	117,157	'	117,157
Maximum amount authorized for repurchase of common stock under the share repurchase program	'	'	267,157
Remaining value of common stock to be repurchased under the share repurchase program	$102,843	$150,000	'
Share repurchase program expiration date	31-Mar-14	31-Mar-15	'