Commvault Systems (CVLT) 10-Q 26 Jul 17 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2017	Jul. 24, 2017
Document And Entity Information [Abstract]
Trading Symbol	CVLT
Entity Registrant Name	COMMVAULT SYSTEMS INC
Entity Central Index Key	1,169,561
Current Fiscal Year End Date	--03-31
Entity Filer Category	Large Accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2017
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding		45,517,141

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Current assets:
Cash and cash equivalents	$ 349,522	$ 329,491
Short-term investments	131,466	120,693
Trade accounts receivable	131,357	140,084
Other current assets	24,496	15,791
Total current assets	636,841	606,059
Deferred tax assets, net	51,401	50,228
Property and equipment, net	131,209	132,319
Equity method investment	3,660	3,621
Deferred commissions cost	29,953	30,378
Other assets	7,747	7,273
Total assets	860,811	829,878
Current liabilities:
Accounts payable	446	117
Accrued liabilities	69,231	78,701
Deferred revenue	217,539	209,099
Total current liabilities	287,216	287,917
Deferred revenue, less current portion	75,004	70,803
Other liabilities	3,594	4,226
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $0.01 par value: 50,000 shares authorized, no shares issued and outstanding at June 30, 2017 and March 31, 2017	0	0
Common stock, $0.01 par value: 250,000 shares authorized, 45,354 shares and 44,816 shares issued and outstanding at June 30, 2017 and March 31, 2017, respectively	452	447
Additional paid-in capital	720,041	694,477
Accumulated deficit	(216,232)	(215,677)
Accumulated other comprehensive loss	(9,264)	(12,315)
Total stockholders’ equity	494,997	466,932
Total liabilities and stockholders’ equity	$ 860,811	$ 829,878

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2017	Mar. 31, 2017
Statement of Financial Position [Abstract]
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)	45,354,000	44,816,000
Common stock, shares outstanding (in shares)	45,354,000	44,816,000

Consolidated Statements of Loss

Consolidated Statements of Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Revenues:
Software	$ 74,761	$ 63,413
Services	91,211	88,361
Total revenues	165,972	151,774
Cost of revenues:
Software	805	761
Services	20,856	20,234
Total cost of revenues	21,661	20,995
Gross margin	144,311	130,779
Operating expenses:
Sales and marketing	99,909	92,731
Research and development	22,545	19,228
General and administrative	23,851	19,938
Depreciation and amortization	2,367	2,110
Total operating expenses	148,672	134,007
Loss from operations	(4,361)	(3,228)
Interest expense	(232)	(246)
Interest income	433	255
Equity in income (loss) of affiliate	39	(86)
Loss before income taxes	(4,121)	(3,305)
Income tax benefit	(3,837)	(695)
Net loss	$ (284)	$ (2,610)
Net loss per common share:
Basic (in dollars per share)	$ (0.01)	$ (0.06)
Diluted (in dollars per share)	$ (0.01)	$ (0.06)
Weighted average common shares outstanding:
Basic (in shares)	45,128	44,244
Diluted (in shares)	45,128	44,244

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net loss	$ (284)	$ (2,610)
Other comprehensive income (loss):
Foreign currency translation adjustment	3,051	(1,076)
Comprehensive income (loss)	$ 2,767	$ (3,686)

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid – In Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative Effect of Adoption of ASU 2016-09 | Accounting Standards Update 2016-09	$ 164		$ 435	$ (271)
Beginning balance (in shares) at Mar. 31, 2017		44,816
Beginning balance at Mar. 31, 2017	466,932	$ 447	694,477	(215,677)	$ (12,315)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	19,564		19,564
Share issuances related to stock-based compensation (in shares)		538
Share issuances related to stock-based compensation	5,570	$ 5	5,565
Net loss	(284)			(284)
Net loss | Accounting Standards Update 2016-09	2,358
Other comprehensive income	3,051				3,051
Ending balance (in shares) at Jun. 30, 2017		45,354
Ending balance at Jun. 30, 2017	$ 494,997	$ 452	$ 720,041	$ (216,232)	$ (9,264)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Cash flows from operating activities
Net loss	$ (284)	$ (2,610)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	2,772	2,502
Noncash stock-based compensation	19,564	17,340
Excess tax benefits from stock-based compensation	0	(292)
Deferred income taxes	(1,330)	(4,088)
Equity in income (loss) of affiliate	(39)	86
Amortization of deferred commissions cost	4,601	3,840
Changes in operating assets and liabilities:
Trade accounts receivable	11,097	14,084
Other current assets and Other assets	(9,225)	(2,672)
Deferred commissions cost	(3,610)	(3,488)
Accounts payable	328	(145)
Accrued liabilities	(11,076)	(3,553)
Deferred revenue	7,418	2,865
Other liabilities	(283)	178
Net cash provided by operating activities	19,933	24,047
Cash flows from investing activities
Purchase of short-term investments	(44,072)	(33,299)
Proceeds from maturity of short-term investments	33,299	24,438
Purchase of property and equipment	(1,474)	(1,033)
Net cash used in investing activities	(12,247)	(9,894)
Cash flows from financing activities
Proceeds from stock-based compensation plans	5,570	1,550
Excess tax benefits from stock-based compensation (see Note 2)	0	292
Net cash provided by financing activities	5,570	1,842
Effects of exchange rate — changes in cash	6,775	(1,855)
Net increase in cash and cash equivalents	20,031	14,140
Cash and cash equivalents at beginning of period	329,491	288,107
Cash and cash equivalents at end of period	$ 349,522	$ 302,247

Basis of Presentation

Basis of Presentation	3 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation Commvault Systems, Inc. and its subsidiaries (“Commvault” or the “Company”) is a 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. The consolidated financial statements as of June 30, 2017 and for the three months ended June 30, 2017 and 2016 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 2017 . 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 Company has early adopted the new revenue standard as of April 1, 2017 using the full retrospective method which required each prior reporting period presented to be adjusted beginning with this issuance of the Company’s financial statements. 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, income taxes and related reserves, stock-based compensation and accounting for research and development costs. Actual results could differ from those estimates.

Summary of Significant Accounti

Summary of Significant Accounting Policies	3 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies During fiscal 2018 the Company adopted new accounting guidance related to revenue recognition and accounting for share-based compensation which is described below. The impact of this new guidance is described below. There have been no other significant changes in the Company’s accounting policies during the three months ended June 30, 2017 as compared to the significant accounting policies described in its Annual Report on Form 10-K for the year ended March 31, 2017 . 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 replaced 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 required each prior reporting period presented to be adjusted beginning with this issuance of the Company’s financial statements. The most significant impact of adopting the new standard related to the deferral of commission costs. A portion of sales commissions cost is now recorded as an asset and recognized as an operating expense over the time period that the Company expects to recover the costs. Select adjusted 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. Three Months Ended June 30, 2016 Unaudited As Reported Adjustments Adjusted for Adoption of ASC 606 Revenues: Software $ 63,937 $ (524 ) $ 63,413 Services 88,476 (115 ) 88,361 Total revenues 152,413 (639 ) 151,774 Total cost of revenues 20,995 — 20,995 Gross margin 131,418 (639 ) 130,779 Total operating expenses 133,966 41 134,007 Loss from operations (2,548 ) (680 ) (3,228 ) Interest expense (246 ) — (246 ) Interest income 255 — 255 Equity in loss of affiliate (86 ) — (86 ) Loss before income taxes (2,625 ) (680 ) (3,305 ) Income tax benefit (581 ) (114 ) (695 ) Net loss $ (2,044 ) $ (566 ) $ (2,610 ) March 31, 2017 Unaudited Balance Sheet Data As Reported Adjustments Adjusted for Adoption of ASC 606 Current assets: Trade accounts receivable $ 132,761 $ 7,323 $ 140,084 Total current assets $ 598,736 $ 7,323 $ 606,059 Deferred tax assets, net $ 61,018 $ (10,790 ) $ 50,228 Deferred commissions $ — $ 30,378 $ 30,378 Total assets $ 802,967 $ 26,911 $ 829,878 Current Liabilities: Deferred revenue $ 206,777 $ 2,322 $ 209,099 Total current liabilities $ 285,595 $ 2,322 $ 287,917 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 $ 26,911 $ 829,878 Share-Based Compensation In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting (Topic 718), which simplifies the accounting for share-based payment transactions, including related accounting for income taxes, forfeitures, and classification in the statement of cash flows. The Company adopted the guidance prospectively effective April 1, 2017. The guidance requires excess tax benefits and tax deficiencies to be recorded as income tax benefit or expense in the statement of income when the awards vest or are settled, and eliminates the requirement to reclassify cash flows related to excess tax benefits from operating activities to financing activities on the statement of cash flows. In the three months ended June 30, 2017, the Company recognized $2,358 of such excess tax benefits, and, pursuant to the adopted guidance, net loss decreased by $2,358 , or $0.05 per basic and diluted share. Amounts previously recorded to Additional paid-in capital related to excess tax benefits prior to April 1, 2017 remain in Stockholders' equity. Cash flows related to excess taxes prior to April 1, 2017 remain classified as financing cash flows. In addition, the standard allows the Company to repurchase more of an employee’s vesting shares for tax withholding purposes without triggering liability accounting, and provides an accounting policy election to account for forfeitures as they occur. The Company has elected to account for forfeitures as they occur. The cumulative impact of the election to account for forfeitures as they are incurred is included as an adjustment to accumulated deficit. 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. Trade and Other Receivables Trade and other receivables are primarily comprised of trade receivables that are recorded at the invoice amount, net of an allowance for doubtful accounts, which is not material. Unbilled receivables represent amounts for which revenue has been recognized but which have not yet been invoiced to the customer. The current portion of unbilled receivables is included in Trade accounts receivable on the consolidated balance sheet. Long term unbilled receivables are included in Other assets. Sales Tax The Company records revenue net of sales tax. Shipping and Handling Costs Shipping and handling costs are included in cost of revenues for all periods presented Deferred Commissions Cost Sales commissions and related payroll taxes earned by the Company's employees are considered incremental and recoverable costs of obtaining a contract with a customer. The costs related to revenue that will be recognized in future periods is deferred and then amortized over a period of benefit that the Company has determined to be five years. The period of benefit was determined by taking into consideration customer contracts, technology and other factors. Amortization expense related to these costs is included in Sales and marketing expenses in the accompanying condensed consolidated statements of loss. 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. The value of deferred revenues will increase or decrease based on the timing of invoices and recognition of revenue. Related Party Transactions During the first quarter of fiscal 2018, one of our Directors, Joseph F. Eazor, was hired as the CEO of Rackspace, Inc ("Rackspace"). Prior to his appointment as CEO, the Company completed the sale of $4,212 of software and related services to Rackspace. Total recognized revenue related to Rackspace in the first quarter of fiscal 2018 was $4,054 . The outstanding accounts receivable from this customer as of June 30, 2017 is $4,032 . 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% and 34% of total revenues for the three months ended June 30, 2017 and 2016 , respectively. Arrow accounted for approximately 33% of total accounts receivable as of June 30, 2017 and 40% of total accounts receivable as of March 31, 2017 . Sales through the Company’s distribution agreement with Avnet Technology Solutions ("Avnet") totaled 12% of total revenues for the three months ended June 30, 2017 . Avnet accounted for approximately 13% of total accounts receivable as of June 30, 2017 and 12% of total accounts receivable as of March 31, 2017 . The Company has an original equipment manufacturer agreement with Hitachi Data Systems ("HDS") for them to market, sell and support the Company's software applications and services on a stand-alone basis and/or incorporate the Company's software applications into their own hardware products. HDS accounted for 11% of total revenues for the three months ended June 30, 2017 . HDS accounted for approximately 12% of total accounts receivable as of June 30, 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. The Company’s cash equivalents balance consists primarily of money market funds. The Company’s short-term investments balance consists of U.S. Treasury Bills with maturities of one year or less. The Company accounts for its short-term investments as held to maturity. 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 at June 30, 2017 and March 31, 2017 : June 30, 2017 Level 1 Level 2 Level 3 Total Cash equivalents $ 88,554 — — $ 88,554 Short-term investments $ — 131,774 — $ 131,774 March 31, 2017 Level 1 Level 2 Level 3 Total Cash equivalents $ 70,190 — — $ 70,190 Short-term investments $ — 120,989 — $ 120,989

Revenue

Revenue	3 Months Ended
	Jun. 30, 2017
Revenue from Contract with Customer [Abstract]
Revenue	Revenue The Company accounts for revenue in accordance with ASC Topic 606, Revenue from Contracts with Customers, which was adopted on April 1, 2017, using the full retrospective method. The Company derives revenues from two primary sources: software licenses and services. Services include customer support (software updates and technical support), consulting, assessment and design services, installation services and customer education. A typical contract includes both licenses and services. The Company’s software licenses typically provide for a perpetual right to use the Company’s software. The Company also sells term-based software licenses that expire, which are referred to as subscription arrangements. The Company does not customize its software for customers and installation services are not required. The software is delivered before related services are provided and is functional without professional services, updates and technical support. The Company has concluded that its software license is distinct as the customer can benefit from the software on its own. Software revenue is typically recognized when the software is delivered or made available for download to the Company’s customer. In addition, the Company has licensing arrangements with customers that are accounted for as usage-based royalties. Revenue from these arrangements is recognized as the usage occurs. 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. The Company sells its customer support contracts as a percentage of net software purchases the support is related to. Customer support revenue is recognized ratably over the term of the customer support agreement, which is typically one year. The Company’s other professional services include consulting, assessment and design services, installation services and customer education. Customer education services include courses taught by the Company’s instructors or third-party contractors. Revenue related to other professional services and customer education services is typically recognized as the services are performed. Most of the Company’s contracts with customers contain multiple performance obligations. For these contracts, the Company accounts for individual performance obligations separately if they are distinct. The transaction price is allocated to the separate performance obligations on a relative standalone selling price basis. Standalone selling prices of software are typically estimated using the residual approach. Standalone selling prices of services are typically estimated based on observable transactions when these services are sold on a standalone basis. The Company’s typical performance obligations include the following: Performance Obligation When Performance Obligation is Typically Satisfied When Payment is Typically Due How Standalone Selling Price is Typically Estimated Software Revenue Software Licenses Upon shipment or made available for download (point in time) Within 90 days of shipment except for certain subscription licenses which are paid for over time Residual approach Customer Support Revenue Software Updates Ratably over the course of the support contract (over time) At the beginning of the contract period Observable in renewal transactions Customer Support Ratably over the course of the support contract (over time) At the beginning of the contract period Observable in renewal transactions Professional Services Other Professional Services (except for education services) As work is performed (over time) Within 90 days of services being performed Observable in transactions without multiple performance obligations Education Services When the class is taught (point in time) Within 90 days of services being performed Observable in transactions without multiple performance obligations Disaggregation of Revenue The Company disaggregates revenue from contracts with customers into the nature of the products and services and geographical regions. The geographic regions that are tracked are the Americas (United States, Canada, Latin America), EMEA (Europe, Middle East, Africa) and APAC (Australia, New Zealand, Southeast Asia, China). The Company operates in one segment. Three Months Ended June 30, 2017 Americas EMEA APAC Total Software Revenue $ 40,011 $ 23,772 $ 10,978 $ 74,761 Customer Support Revenue 56,189 17,111 8,590 81,890 Professional Services 4,861 2,545 1,915 9,321 Total Revenue $ 101,061 $ 43,428 $ 21,483 $ 165,972 Three Months Ended June 30, 2016 Americas EMEA APAC Total Software Revenue $ 35,801 $ 17,633 $ 9,979 $ 63,413 Customer Support Revenue 53,603 16,626 8,038 78,267 Professional Services 6,025 2,816 1,253 10,094 Total Revenue $ 95,429 $ 37,075 $ 19,270 $ 151,774 Information about Contract Balances Amounts collected in advance of services being provided are accounted for as deferred revenue. Nearly all of the Company's deferred revenue balance is related to services revenue, primarily customer support contracts. In some arrangements the Company allows customers to pay for term based software licenses over the term of the software license. The Company refers to these as subscription transactions. Amounts recognized as revenue in excess of amounts billed are recorded as unbilled receivables. Unbilled receivables which are anticipated to be invoiced in the next twelve months are included in Accounts receivable on the consolidated balance sheet. Long term unbilled receivables are included in Other assets. The opening and closing balances of the Company’s accounts receivable, unbilled receivables, and deferred revenues are as follows: Accounts Receivable Unbilled Receivable (current) Unbilled Receivable (long-term) Deferred Revenue (current) Deferred Revenue (long-term) Opening Balance as of March 31, 2017 $ 132,711 $ 7,373 $ — $ 209,099 $ 70,803 Increase/decrease, net (7,633 ) (1,094 ) 640 8,440 4,201 Ending Balance as of June 30, 2017 $ 125,078 $ 6,279 $ 640 $ 217,539 $ 75,004 The decrease in accounts receivable is a result of the sequential decline in software revenue as well as customer support renewals which are more concentrated in the Company's fiscal fourth quarter. The increase in deferred revenue is primarily the result of an increase in deferred customer support revenue related to software revenue transactions and customer support renewals during the first quarter of fiscal 2018, most of which will be recognized over the course of the next twelve months. The amount of revenue recognized in the period that was included in the opening deferred revenue balance was $78,932 . The vast majority of this revenue consists of customer support arrangements. The amount of revenue recognized from performance obligations satisfied in prior periods was not material. Remaining Performance Obligations In addition to the amounts included in deferred revenue as of June 30, 2017 , approximately $14,840 of revenue may be recognized from remaining performance obligations, of which $687 was related to software. The Company expects the software to be recognized next quarter. The majority of this services revenue is related to other professional services which may be recognized over the next twelve months but is contingent upon a number of factors, including customers’ needs and schedules.

Property and Equipment

Property and Equipment	3 Months Ended
	Jun. 30, 2017
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment consist of the following: June 30, March 31, 2017 2017 Land $ 9,445 $ 9,445 Buildings 103,244 103,244 Computers, servers and other equipment 35,858 35,274 Furniture and fixtures 15,393 14,912 Leasehold improvements 8,632 7,040 Purchased software 1,341 1,335 Construction in process 151 1,147 174,064 172,397 Less: Accumulated depreciation and amortization (42,855 ) (40,078 ) $ 131,209 $ 132,319 The Company recorded depreciation and amortization expense of $2,709 and $2,439 for the three months ended June 30, 2017 and 2016 , respectively.

Net Income per Common Share

Net Income per Common Share	3 Months Ended
	Jun. 30, 2017
Earnings Per Share [Abstract]
Net Income per Common Share	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 diluted weighted average shares outstanding exclude outstanding stock options, restricted stock units, performance stock options, performance restricted stock units and shares to be purchased under the employee stock purchase plan totaling approximately 7,775 and 8,443 for the three months ended June 30, 2017 and 2016 , respectively, because the effect would have been anti-dilutive.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In the normal course of its business, the Company may be involved in various claims, negotiations and legal actions. As of June 30, 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 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 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 June 30, 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 June 30, 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 June 30, 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

Revolving Credit Facility	3 Months Ended
	Jun. 30, 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 June 30, 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 June 30, 2017 were $505 . The amortization of debt issuance costs was $63 in the three months ended June 30, 2017 and 2016.

Capitalization

Capitalization	3 Months Ended
	Jun. 30, 2017
Equity [Abstract]
Capitalization	Capitalization The Company did not repurchase any of its shares during the three months ended June 30, 2017 . As of June 30, 2017 , $125,000 remained in the stock repurchase authorization that expires on March 31, 2018.

Stock Plans

Stock Plans	3 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock Plans	Stock Plans On August 16, 2016, the Company’s Omnibus Incentive Plan (the “2016 Incentive Plan”) was approved by its shareholders. The 2016 Incentive Plan authorizes a broad range of awards including stock options, stock appreciation rights, full value awards (including restricted stock, restricted stock units, performance shares or units and other stock-based awards) and cash-based awards. The maximum number of shares of common stock that may be delivered under the 2016 Incentive Plan is equal to 2,800 shares. 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 months ended June 30, 2017 and 2016 . Stock-based compensation is attributable to stock options, restricted stock units, performance based awards and the employee stock purchase plan. Three Months Ended June 30, 2017 2016 Cost of services revenue $ 751 $ 871 Sales and marketing 9,440 7,671 Research and development 2,070 1,678 General and administrative 7,303 7,120 Stock-based compensation expense $ 19,564 $ 17,340 As of June 30, 2017 , there was approximately $99,267 of unrecognized stock-based compensation expense related to non-vested stock option and restricted stock unit awards that is expected to be recognized over a weighted average period of 1.36 years. The Company accounts for forfeitures as they occur. To the extent that awards are forfeitured, stock-based compensation will be different from the Company’s current estimate. Stock Options Stock Option activity for the three months ended June 30, 2017 is as follows: Options Number of Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding as of March 31, 2017 5,300 $ 44.74 Options granted — — Options exercised (223 ) 25.01 Options forfeited (10 ) 45.79 Options expired (7 ) 59.90 Outstanding as of June 30, 2017 5,060 $ 45.59 4.64 $ 83,710 Exercisable as of June 30, 2017 4,569 $ 44.78 4.36 $ 79,222 The total intrinsic value of options exercised was $7,002 for the three months ended June 30, 2017 and $1,369 for the three months ended June 30, 2016 . The Company’s policy is to issue new shares upon exercise of options as the Company does not hold shares in treasury. Restricted Stock Units Restricted stock unit activity for the three months ended June 30, 2017 is as follows: Non-vested Restricted Stock Units Number of Weighted Non-vested as of March 31, 2017 2,396 $ 45.53 Awarded 403 60.19 Vested (315 ) 54.13 Forfeited (44 ) 45.25 Non-vested as of June 30, 2017 2,440 $ 47.47 The weighted average fair value of restricted stock units awarded was $60.19 per unit during the three months ended June 30, 2017 , and $46.88 per unit during the three months ended June 30, 2016 . The weighted average fair value of awards includes the awards with a market condition described below. Performance Based Awards In the three months ended June 30, 2017 , the Company granted 88 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 over three years and have a maximum potential to vest at 200% ( 176 shares) based on actual fiscal 2018 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 the interim financial periods, management estimates the probable number of PSU’s that would vest until the ultimate achievement of the performance goals is known. The awards are included in the restricted stock unit table. Awards with a Market Condition In the three months ended June 30, 2017 , the Company granted 88 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% ( 176 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 fair value of the awards granted during the three months ended June 30, 2017 was $78.28 . The awards are included in the restricted stock unit table. 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 the 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. As of June 30, 2017 , 2,400 shares were reserved for future issuance under the Purchase Plan. 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 was $676 for the three months ended June 30, 2017 and $679 for the three months ended June 30, 2016 .

Income Taxes

Income Taxes	3 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Income tax benefit was $3,837 in the three months ended June 30, 2017 . The income tax benefit in the three month period ended June 30, 2017 is primarily related to the $2,358 impact of excess tax benefits for exercised stock options and vested restricted stock units. In prior periods, excess tax benefits were accounted for as a component of equity. The income tax benefit also includes the favorable impact of research tax credits and was partially offset by the unfavorable impact of permanent book to tax differences. Income tax benefit was $695 in the three months ended June 30, 2016 The effective rate of the income tax benefit in the three month period is lower than the federal statutory rate due to the impact of unfavorable permanent differences, partially offset by the impact of research tax credits. 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 as of March 31, 2017 $ 2,098 Additions for tax positions related to fiscal 2017 64 Additions for tax positions related to prior years — Settlements and effective settlements with tax authorities and remeasurements — Reductions related to the expiration of statutes of limitations — Foreign currency translation adjustment 1 Balance as of June 30, 2017 $ 2,163 All of the Company’s unrecognized tax benefits would favorably impact the effective tax rate if they were recognized. 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 $1,434 are recorded as Other Liabilities on the Consolidated Balance Sheet, of which $321 represents interest and penalties. The Company also has unrecognized tax benefits and related accrued interest and penalties totaling $1,146 as a reduction of Deferred Tax Assets on the Consolidated Balance Sheet, of which $96 represents interest and penalties. 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 years subject to income tax examination in the Company’s foreign jurisdictions cover the maximum time period with respect to these jurisdictions. Due to net operating loss ("NOL") carryforwards, in some cases the tax years continue to remain subject to examination with respect to such NOLs.

Summary of Significant Accoun18

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Basis of Presentation	The consolidated financial statements as of June 30, 2017 and for the three months ended June 30, 2017 and 2016 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 2017 . 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 Company has early adopted the new revenue standard as of April 1, 2017 using the full retrospective method which required each prior reporting period presented to be adjusted beginning with this issuance of the Company’s financial statements.
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, income taxes and related reserves, stock-based compensation and accounting for research and development costs. Actual results could differ from those estimates.
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 replaced 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 required each prior reporting period presented to be adjusted beginning with this issuance of the Company’s financial statements. The most significant impact of adopting the new standard related to the deferral of commission costs. A portion of sales commissions cost is now recorded as an asset and recognized as an operating expense over the time period that the Company expects to recover the costs. Select adjusted 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. Three Months Ended June 30, 2016 Unaudited As Reported Adjustments Adjusted for Adoption of ASC 606 Revenues: Software $ 63,937 $ (524 ) $ 63,413 Services 88,476 (115 ) 88,361 Total revenues 152,413 (639 ) 151,774 Total cost of revenues 20,995 — 20,995 Gross margin 131,418 (639 ) 130,779 Total operating expenses 133,966 41 134,007 Loss from operations (2,548 ) (680 ) (3,228 ) Interest expense (246 ) — (246 ) Interest income 255 — 255 Equity in loss of affiliate (86 ) — (86 ) Loss before income taxes (2,625 ) (680 ) (3,305 ) Income tax benefit (581 ) (114 ) (695 ) Net loss $ (2,044 ) $ (566 ) $ (2,610 ) March 31, 2017 Unaudited Balance Sheet Data As Reported Adjustments Adjusted for Adoption of ASC 606 Current assets: Trade accounts receivable $ 132,761 $ 7,323 $ 140,084 Total current assets $ 598,736 $ 7,323 $ 606,059 Deferred tax assets, net $ 61,018 $ (10,790 ) $ 50,228 Deferred commissions $ — $ 30,378 $ 30,378 Total assets $ 802,967 $ 26,911 $ 829,878 Current Liabilities: Deferred revenue $ 206,777 $ 2,322 $ 209,099 Total current liabilities $ 285,595 $ 2,322 $ 287,917 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 $ 26,911 $ 829,878 Share-Based Compensation In March 2016, the FASB issued ASU No. 2016-09, Improvements to Employee Share-Based Payment Accounting (Topic 718), which simplifies the accounting for share-based payment transactions, including related accounting for income taxes, forfeitures, and classification in the statement of cash flows. The Company adopted the guidance prospectively effective April 1, 2017. The guidance requires excess tax benefits and tax deficiencies to be recorded as income tax benefit or expense in the statement of income when the awards vest or are settled, and eliminates the requirement to reclassify cash flows related to excess tax benefits from operating activities to financing activities on the statement of cash flows. In the three months ended June 30, 2017, the Company recognized $2,358 of such excess tax benefits, and, pursuant to the adopted guidance, net loss decreased by $2,358 , or $0.05 per basic and diluted share. Amounts previously recorded to Additional paid-in capital related to excess tax benefits prior to April 1, 2017 remain in Stockholders' equity. Cash flows related to excess taxes prior to April 1, 2017 remain classified as financing cash flows. In addition, the standard allows the Company to repurchase more of an employee’s vesting shares for tax withholding purposes without triggering liability accounting, and provides an accounting policy election to account for forfeitures as they occur. The Company has elected to account for forfeitures as they occur. The cumulative impact of the election to account for forfeitures as they are incurred is included as an adjustment to accumulated deficit. 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.
Trade and Other Receivables	Trade and other receivables are primarily comprised of trade receivables that are recorded at the invoice amount, net of an allowance for doubtful accounts, which is not material. Unbilled receivables represent amounts for which revenue has been recognized but which have not yet been invoiced to the customer. The current portion of unbilled receivables is included in Trade accounts receivable on the consolidated balance sheet. Long term unbilled receivables are included in Other assets.
Sales Tax	The Company records revenue net of sales tax.
Shipping and Handling Cost	Shipping and handling costs are included in cost of revenues for all periods presented
Deferred Commissions Cost	Sales commissions and related payroll taxes earned by the Company's employees are considered incremental and recoverable costs of obtaining a contract with a customer. The costs related to revenue that will be recognized in future periods is deferred and then amortized over a period of benefit that the Company has determined to be five years. The period of benefit was determined by taking into consideration customer contracts, technology and other factors. Amortization expense related to these costs is included in Sales and marketing expenses in the accompanying condensed consolidated statements of loss.
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. The value of deferred revenues will increase or decrease based on the timing of invoices and recognition of revenue.
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	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. The Company’s cash equivalents balance consists primarily of money market funds. The Company’s short-term investments balance consists of U.S. Treasury Bills with maturities of one year or less. The Company accounts for its short-term investments as held to maturity. 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.

Summary of Significant Accoun19

Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Revenue from Contract with Customer Financial Statement Impact	Select adjusted 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. Three Months Ended June 30, 2016 Unaudited As Reported Adjustments Adjusted for Adoption of ASC 606 Revenues: Software $ 63,937 $ (524 ) $ 63,413 Services 88,476 (115 ) 88,361 Total revenues 152,413 (639 ) 151,774 Total cost of revenues 20,995 — 20,995 Gross margin 131,418 (639 ) 130,779 Total operating expenses 133,966 41 134,007 Loss from operations (2,548 ) (680 ) (3,228 ) Interest expense (246 ) — (246 ) Interest income 255 — 255 Equity in loss of affiliate (86 ) — (86 ) Loss before income taxes (2,625 ) (680 ) (3,305 ) Income tax benefit (581 ) (114 ) (695 ) Net loss $ (2,044 ) $ (566 ) $ (2,610 ) March 31, 2017 Unaudited Balance Sheet Data As Reported Adjustments Adjusted for Adoption of ASC 606 Current assets: Trade accounts receivable $ 132,761 $ 7,323 $ 140,084 Total current assets $ 598,736 $ 7,323 $ 606,059 Deferred tax assets, net $ 61,018 $ (10,790 ) $ 50,228 Deferred commissions $ — $ 30,378 $ 30,378 Total assets $ 802,967 $ 26,911 $ 829,878 Current Liabilities: Deferred revenue $ 206,777 $ 2,322 $ 209,099 Total current liabilities $ 285,595 $ 2,322 $ 287,917 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 $ 26,911 $ 829,878
Financial Assets Measured at Fair Value	The following table summarizes the composition of the Company’s financial assets measured at fair value at June 30, 2017 and March 31, 2017 : June 30, 2017 Level 1 Level 2 Level 3 Total Cash equivalents $ 88,554 — — $ 88,554 Short-term investments $ — 131,774 — $ 131,774 March 31, 2017 Level 1 Level 2 Level 3 Total Cash equivalents $ 70,190 — — $ 70,190 Short-term investments $ — 120,989 — $ 120,989

Revenue (Tables)

Revenue (Tables)	3 Months Ended
	Jun. 30, 2017
Revenue from Contract with Customer [Abstract]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction	The Company’s typical performance obligations include the following: Performance Obligation When Performance Obligation is Typically Satisfied When Payment is Typically Due How Standalone Selling Price is Typically Estimated Software Revenue Software Licenses Upon shipment or made available for download (point in time) Within 90 days of shipment except for certain subscription licenses which are paid for over time Residual approach Customer Support Revenue Software Updates Ratably over the course of the support contract (over time) At the beginning of the contract period Observable in renewal transactions Customer Support Ratably over the course of the support contract (over time) At the beginning of the contract period Observable in renewal transactions Professional Services Other Professional Services (except for education services) As work is performed (over time) Within 90 days of services being performed Observable in transactions without multiple performance obligations Education Services When the class is taught (point in time) Within 90 days of services being performed Observable in transactions without multiple performance obligations
Disaggregation of Revenue	Three Months Ended June 30, 2017 Americas EMEA APAC Total Software Revenue $ 40,011 $ 23,772 $ 10,978 $ 74,761 Customer Support Revenue 56,189 17,111 8,590 81,890 Professional Services 4,861 2,545 1,915 9,321 Total Revenue $ 101,061 $ 43,428 $ 21,483 $ 165,972 Three Months Ended June 30, 2016 Americas EMEA APAC Total Software Revenue $ 35,801 $ 17,633 $ 9,979 $ 63,413 Customer Support Revenue 53,603 16,626 8,038 78,267 Professional Services 6,025 2,816 1,253 10,094 Total Revenue $ 95,429 $ 37,075 $ 19,270 $ 151,774
Contract with Customer, Asset and Liability	The opening and closing balances of the Company’s accounts receivable, unbilled receivables, and deferred revenues are as follows: Accounts Receivable Unbilled Receivable (current) Unbilled Receivable (long-term) Deferred Revenue (current) Deferred Revenue (long-term) Opening Balance as of March 31, 2017 $ 132,711 $ 7,373 $ — $ 209,099 $ 70,803 Increase/decrease, net (7,633 ) (1,094 ) 640 8,440 4,201 Ending Balance as of June 30, 2017 $ 125,078 $ 6,279 $ 640 $ 217,539 $ 75,004

Property and Equipment (Tables)

Property and Equipment (Tables)	3 Months Ended
	Jun. 30, 2017
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and equipment consist of the following: June 30, March 31, 2017 2017 Land $ 9,445 $ 9,445 Buildings 103,244 103,244 Computers, servers and other equipment 35,858 35,274 Furniture and fixtures 15,393 14,912 Leasehold improvements 8,632 7,040 Purchased software 1,341 1,335 Construction in process 151 1,147 174,064 172,397 Less: Accumulated depreciation and amortization (42,855 ) (40,078 ) $ 131,209 $ 132,319

Stock Plans (Tables)

Stock Plans (Tables)	3 Months Ended
	Jun. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
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 months ended June 30, 2017 and 2016 . Stock-based compensation is attributable to stock options, restricted stock units, performance based awards and the employee stock purchase plan. Three Months Ended June 30, 2017 2016 Cost of services revenue $ 751 $ 871 Sales and marketing 9,440 7,671 Research and development 2,070 1,678 General and administrative 7,303 7,120 Stock-based compensation expense $ 19,564 $ 17,340
Schedule of Stock Option Activity	Stock Option activity for the three months ended June 30, 2017 is as follows: Options Number of Options Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (Years) Aggregate Intrinsic Value Outstanding as of March 31, 2017 5,300 $ 44.74 Options granted — — Options exercised (223 ) 25.01 Options forfeited (10 ) 45.79 Options expired (7 ) 59.90 Outstanding as of June 30, 2017 5,060 $ 45.59 4.64 $ 83,710 Exercisable as of June 30, 2017 4,569 $ 44.78 4.36 $ 79,222
Schedule of Restricted Stock Unit Activity	Restricted stock unit activity for the three months ended June 30, 2017 is as follows: Non-vested Restricted Stock Units Number of Weighted Non-vested as of March 31, 2017 2,396 $ 45.53 Awarded 403 60.19 Vested (315 ) 54.13 Forfeited (44 ) 45.25 Non-vested as of June 30, 2017 2,440 $ 47.47

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Jun. 30, 2017
Income Tax Disclosure [Abstract]
Reconciliation of Amounts of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amounts of unrecognized tax benefits is as follows: Balance as of March 31, 2017 $ 2,098 Additions for tax positions related to fiscal 2017 64 Additions for tax positions related to prior years — Settlements and effective settlements with tax authorities and remeasurements — Reductions related to the expiration of statutes of limitations — Foreign currency translation adjustment 1 Balance as of June 30, 2017 $ 2,163

Summary of Significant Accoun24

Summary of Significant Accounting Policies - Recently Issued Accounting Standards - ASU 2014-09 I (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Software	$ 74,761	$ 63,413
Services	91,211	88,361
Total revenues	165,972	151,774
Total cost of revenues	21,661	20,995
Gross margin	144,311	130,779
Total operating expenses	148,672	134,007
Loss from operations	(4,361)	(3,228)
Interest expense	(232)	(246)
Interest income	433	255
Equity in loss of affiliate	39	(86)
Loss before income taxes	(4,121)	(3,305)
Income tax benefit	(3,837)	(695)
Net loss	$ (284)	(2,610)
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Software		63,937
Services		88,476
Total revenues		152,413
Total cost of revenues		20,995
Gross margin		131,418
Total operating expenses		133,966
Loss from operations		(2,548)
Interest expense		(246)
Interest income		255
Equity in loss of affiliate		(86)
Loss before income taxes		(2,625)
Income tax benefit		(581)
Net loss		(2,044)
Adjustments | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Software		(524)
Services		(115)
Total revenues		(639)
Total cost of revenues		0
Gross margin		(639)
Total operating expenses		41
Loss from operations		(680)
Interest expense		0
Interest income		0
Equity in loss of affiliate		0
Loss before income taxes		(680)
Income tax benefit		(114)
Net loss		$ (566)

Summary of Significant Accoun25

Summary of Significant Accounting Policies - Recently Issued Accounting Standards - ASU 2014-09 II (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade accounts receivable		$ 140,084
Total current assets	$ 636,841	606,059
Deferred tax assets, net	51,401	50,228
Deferred commissions	29,953	30,378
Total assets	860,811	829,878
Deferred revenue	217,539	209,099
Total current liabilities	287,216	287,917
Other liabilities	3,594	4,226
Accumulated deficit	(216,232)	(215,677)
Total stockholders’ equity	494,997	466,932
Total liabilities and stockholders’ equity	$ 860,811	829,878
As Reported
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade accounts receivable		132,761
Total current assets		598,736
Deferred tax assets, net		61,018
Total assets		802,967
Deferred revenue		206,777
Total current liabilities		285,595
Other liabilities		3,934
Accumulated deficit		(239,974)
Total stockholders’ equity		442,635
Total liabilities and stockholders’ equity		802,967
Adjustments | Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Trade accounts receivable		7,323
Total current assets		7,323
Deferred tax assets, net		(10,790)
Deferred commissions		30,378
Total assets		26,911
Deferred revenue		2,322
Total current liabilities		2,322
Other liabilities		292
Accumulated deficit		24,297
Total stockholders’ equity		24,297
Total liabilities and stockholders’ equity		$ 26,911

Summary of Significant Accoun26

Summary of Significant Accounting Policies - Share-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Excess tax benefits	$ 2,358
Decrease to net loss	$ (284)	$ (2,610)
Decrease to earnings per share, basic (in dollars per share)	$ (0.01)	$ (0.06)
Decrease to earnings per share, diluted (in dollars per share)	$ (0.01)	$ (0.06)
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Decrease to net loss	$ 2,358
Decrease to earnings per share, basic (in dollars per share)	$ (0.05)
Decrease to earnings per share, diluted (in dollars per share)	$ (0.05)

Summary of Significant Accoun27

Summary of Significant Accounting Policies - Deferred Commissions Cost (Details)	3 Months Ended
	Jun. 30, 2017
Accounting Policies [Abstract]
Deferred commissions cost, period of benefit	5 years

Summary of Significant Accoun28

Summary of Significant Accounting Policies - Related Party Transactions (Details) - Director - Director on Company's board of directors hired as CEO of Rackspace, Inc. - USD ($) $ in Thousands	Mar. 31, 2017	Jun. 30, 2017
Related Party Transaction [Line Items]
Revenue from related party	$ 4,212	$ 4,054
Accounts receivable from related party		$ 4,032

Summary of Significant Accoun29

Summary of Significant Accounting Policies - Concentration of Credit Risk (Details) - Customer Concentration Risk	3 Months Ended		12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Arrow | Revenue
Concentration Risk [Line Items]
Concentration risk percentage	36.00%	34.00%
Arrow | Accounts receivable
Concentration Risk [Line Items]
Concentration risk percentage	33.00%		40.00%
Avnet | Revenue
Concentration Risk [Line Items]
Concentration risk percentage	12.00%
Avnet | Accounts receivable
Concentration Risk [Line Items]
Concentration risk percentage	13.00%		12.00%
HDS | Revenue
Concentration Risk [Line Items]
Concentration risk percentage	11.00%
HDS | Accounts receivable
Concentration Risk [Line Items]
Concentration risk percentage	12.00%

Summary of Significant Accoun30

Summary of Significant Accounting Policies - Summary of Fair Value of Financial Assets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	$ 88,554	$ 70,190
Short-term investments	131,774	120,989
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	88,554	70,190
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	131,774	120,989
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Short-term investments	$ 0	$ 0

Revenue - Additional Informati

Revenue - Additional Information (Details) $ in Thousands	3 Months Ended	12 Months Ended
	Jun. 30, 2017USD ($)revenue_sourcesegment	Mar. 31, 2017USD ($)
Revenue from Contract with Customer [Abstract]
Sources of primary revenue | revenue_source	2
Customer support agreement term	1 year
Number of operating segments | segment	1
Revenue recognized in period, included in opening deferred revenue balance		$ 78,932
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized from remaining performance obligations	$ 14,840
Software Revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue expected to be recognized from remaining performance obligations	$ 687

Revenue - Performance Obligati

Revenue - Performance Obligations (Details)	3 Months Ended
	Jun. 30, 2017
Software Revenue
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, expected payment terms	90 days
Professional Services, other
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, expected payment terms	90 days
Professional Services, education services
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, expected payment terms	90 days

Revenue - Disaggregation of Re

Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Disaggregation of Revenue [Line Items]
Total Revenue	$ 165,972	$ 151,774
Americas
Disaggregation of Revenue [Line Items]
Total Revenue	101,061	95,429
EMEA
Disaggregation of Revenue [Line Items]
Total Revenue	43,428	37,075
APAC
Disaggregation of Revenue [Line Items]
Total Revenue	21,483	19,270
Software Revenue
Disaggregation of Revenue [Line Items]
Total Revenue	74,761	63,413
Software Revenue | Americas
Disaggregation of Revenue [Line Items]
Total Revenue	40,011	35,801
Software Revenue | EMEA
Disaggregation of Revenue [Line Items]
Total Revenue	23,772	17,633
Software Revenue | APAC
Disaggregation of Revenue [Line Items]
Total Revenue	10,978	9,979
Customer Support Revenue
Disaggregation of Revenue [Line Items]
Total Revenue	81,890	78,267
Customer Support Revenue | Americas
Disaggregation of Revenue [Line Items]
Total Revenue	56,189	53,603
Customer Support Revenue | EMEA
Disaggregation of Revenue [Line Items]
Total Revenue	17,111	16,626
Customer Support Revenue | APAC
Disaggregation of Revenue [Line Items]
Total Revenue	8,590	8,038
Professional Services
Disaggregation of Revenue [Line Items]
Total Revenue	9,321	10,094
Professional Services | Americas
Disaggregation of Revenue [Line Items]
Total Revenue	4,861	6,025
Professional Services | EMEA
Disaggregation of Revenue [Line Items]
Total Revenue	2,545	2,816
Professional Services | APAC
Disaggregation of Revenue [Line Items]
Total Revenue	$ 1,915	$ 1,253

Revenue - Opening and Closing

Revenue - Opening and Closing Balances (Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Accounts Receivable [Roll Forward]
Increase/decrease, net	$ (11,097)	$ (14,084)
Trade accounts receivable
Accounts Receivable [Roll Forward]
Opening Balance as of March 31, 2017	132,711
Increase/decrease, net	(7,633)
Ending Balance as of June 30, 2017	125,078
Unbilled Receivable (current) [Roll Forward]
Opening Balance as of March 31, 2017	7,373
Increase/decrease, net	(1,094)
Ending Balance as of June 30, 2017	6,279
Other assets
Unbilled Receivable (long-term) [Roll Forward]
Opening Balance as of March 31, 2017	0
Increase/decrease, net	640
Ending Balance as of June 30, 2017	$ 640

Revenue - Opening and Closin35

Revenue - Opening and Closing Balances (Deferred Revenue) (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2017USD ($)
Deferred revenue
Deferred Revenue (current) [Roll Forward]
Opening Balance as of March 31, 2017	$ 209,099
Increase/decrease, net	8,440
Ending Balance as of June 30, 2017	217,539
Deferred revenue, less current portion
Contract With Customer, Liability, Noncurrent [Roll Forward]
Opening Balance as of March 31, 2017	70,803
Increase/decrease, net	4,201
Ending Balance as of June 30, 2017	$ 75,004

Property and Equipment - Sched

Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Mar. 31, 2017
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 174,064	$ 172,397
Less: Accumulated depreciation and amortization	(42,855)	(40,078)
Property and equipment, net	131,209	132,319
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	103,244
Computers, servers and other equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	35,858	35,274
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	15,393	14,912
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,632	7,040
Purchased software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	1,341	1,335
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 151	$ 1,147

Property and Equipment - Addit

Property and Equipment - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Property, Plant and Equipment [Abstract]
Depreciation and amortization expense	$ 2,709	$ 2,439

Net Income per Common Share -

Net Income per Common Share - Additional Information (Detail) - shares shares in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation (in shares)	7,775	8,443

Commitments and Contingencies

Commitments and Contingencies - Additional Information (Details)	Feb. 27, 2017patent
Realtime
Loss Contingencies [Line Items]
Number of patents involved in alleged infringement	4

Revolving Credit Facility (Deta

Revolving Credit Facility (Details) - Revolving credit facility - USD ($)	Jun. 30, 2014	Jun. 30, 2017	Jun. 30, 2016
Line of Credit Facility [Line Items]
Debt term	5 years
Borrowing capacity	$ 250,000,000
Unused capacity, commitment fee percentage	0.25%
Borrowings under the Credit Facility		$ 0
Unamortized debt issuance costs		505,000
Amortization of debt issuance costs		$ 63,000	$ 63,000
LIBOR rate
Line of Credit Facility [Line Items]
Variable rate	1.50%

Capitalization (Detail)

Capitalization (Detail) - Common stock repurchase program	3 Months Ended
	Jun. 30, 2017USD ($)
Class of Stock [Line Items]
Repurchase of common stock	$ 0
Remaining value of common stock to be repurchased under share repurchase program	$ 125,000,000

Stock Plans - Additional Infor

Stock Plans - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Aug. 16, 2016
Stock options and restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized stock-based compensation expense, net of estimated forfeitures	$ 99,267
Weighted average period awards are expected to be recognized	1 year 4 months 9 days
2016 Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares of common stock that may be delivered under plan (in shares)		2,800,000

Stock Plans - Stock-Based Comp

Stock Plans - Stock-Based Compensation Expense (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 19,564	$ 17,340
Cost of services revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	751	871
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	9,440	7,671
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	2,070	1,678
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 7,303	$ 7,120

Stock Plans - Activity for Com

Stock Plans - Activity for Company's Two Stock Incentive Plans (Detail) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Jun. 30, 2017USD ($)$ / sharesshares
Number of Options
Outstanding (in shares) as of March 31, 2017 | shares	5,300
Options granted (in shares) | shares	0
Options exercised (in shares) | shares	(223)
Options forfeited (in shares) | shares	(10)
Options expired (in shares) | shares	(7)
Outstanding (in shares) as of June 30, 2017 | shares	5,060
Exercisable (in shares) as of June 30, 2017 | shares	4,569
Weighted- Average Exercise Price
Outstanding (in dollars per share) as of March 31, 2017 | $ / shares	$ 44.74
Options granted (in dollars per share) | $ / shares	0
Options exercised (in dollars per share) | $ / shares	25.01
Options forfeited (in dollars per share) | $ / shares	45.79
Options expired (in dollars per share) | $ / shares	59.90
Outstanding (in dollars per share) as of June 30, 2017 | $ / shares	45.59
Exercisable (in dollars per share) as of June 30, 2017 | $ / shares	$ 44.78
Weighted- Average Remaining Contractual Term (Years)
Outstanding (in years) as of June 30, 2017	4 years 7 months 20 days
Exercisable (in years) as of June 30, 2017	4 years 4 months 9 days
Aggregate Intrinsic Value
Outstanding as of June 30, 2017 | $	$ 83,710
Exercisable as of June 30, 2017 | $	$ 79,222

Stock Plans - Stock Options (D

Stock Plans - Stock Options (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Total intrinsic value of options exercised	$ 7,002	$ 1,369

Stock Plans - Restricted Stock

Stock Plans - Restricted Stock Unit Activity (Detail) - Restricted stock units - $ / shares shares in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Number of Awards
Non-vested (in shares) as of March 31, 2017	2,396
Awarded (in shares)	403
Vested (in shares)	(315)
Forfeited (in shares)	(44)
Non-vested (in shares) as of June 30, 2017	2,440
Weighted Average Grant Date Fair Value
Non-vested (in dollars per share) as of March 31, 2017	$ 45.53
Awarded (in dollars per share)	60.19	$ 46.88
Vested (in dollars per share)	54.13
Forfeited (in dollars per share)	45.25
Non-vested (in dollars per share) as of June 30, 2017	$ 47.47

Stock Plans - Restricted Sto47

Stock Plans - Restricted Stock Units (Details) - $ / shares	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average fair value, units awarded (in dollars per share)	$ 60.19	$ 46.88

Stock Plans - Performance-base

Stock Plans - Performance-based and Market-based Awards (Details) shares in Thousands	3 Months Ended
	Jun. 30, 2017tranche$ / sharesshares
Performance stock options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded (in shares)	88
Number of annual tranches | tranche	3
Maximum potential to vest (as a percentage)	200.00%
Maximum potential to vest (in shares)	176
Performance restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awarded (in shares)	88
Number of annual tranches | tranche	3
Maximum potential to vest (as a percentage)	200.00%
Maximum potential to vest (in shares)	176
Service period	3 years
Weighted average fair value, units awarded (in dollars per share) | $ / shares	$ 78.28

Stock Plans - Employee Stock P

Stock Plans - Employee Stock Purchase Plan (Details) - Purchase plan - USD ($) shares in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock purchase price (as a percentage)	85.00%
Offering period	6 months
Maximum employee subscription rate (as a percentage)	10.00%
Maximum annual purchases per employee	$ 25,000
Number of shares reserved for future issuance (in shares)	2,400
Compensation expense	$ 676,000	$ 679,000

Income Taxes - Additional Info

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income tax benefit	$ 3,837	$ 695
Income tax reconciliation, impact of excess tax benefits for exercised stock options and vested restricted stock units	2,358
Reconciliation Of Unrecognized Tax Benefits [Line Items]
Unrecognized tax benefits	2,163		$ 2,098
Other liabilities
Reconciliation Of Unrecognized Tax Benefits [Line Items]
Unrecognized tax benefits	1,434
Unrecognized tax benefits accrued interest and penalties	321
Deferred tax assets
Reconciliation Of Unrecognized Tax Benefits [Line Items]
Unrecognized tax benefits	1,146
Unrecognized tax benefits accrued interest and penalties	$ 96

Income Taxes - Reconciliation

Income Taxes - Reconciliation of Amounts of Unrecognized Tax Benefits (Detail) $ in Thousands	3 Months Ended
	Jun. 30, 2017USD ($)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance as of March 31, 2017	$ 2,098
Additions for tax positions related to fiscal 2017	64
Additions for tax positions related to prior years	0
Settlements and effective settlements with tax authorities and remeasurements	0
Reductions related to the expiration of statutes of limitations	0
Foreign currency translation adjustment	1
Balance as of June 30, 2017	$ 2,163