Cornerstone OnDemand (CSOD) 10-Q 9 May 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	2-May-14
Document Documentand Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	31-Mar-14	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q1	'
Trading Symbol	'CSOD	'
Entity Registrant Name	'CORNERSTONE ONDEMAND INC	'
Entity Central Index Key	'0001401680	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	53,146,278

Consolidated_Balance_Sheets_un

Consolidated Balance Sheets (unaudited) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Assets	'	'
Cash and cash equivalents	$108,685	$109,583
Short-term investments	184,421	199,925
Accounts receivable, net	52,545	67,191
Deferred commissions	15,947	16,634
Prepaid expenses and other current assets	11,890	14,118
Total current assets	373,488	407,451
Capitalized software development costs, net	11,732	10,665
Property and equipment, net	17,333	14,436
Long-term Investments	16,029	0
Intangible assets, net	4,068	4,632
Goodwill	8,193	8,193
Other assets, net	5,675	5,978
Total Assets	436,518	451,355
Liabilities:	'	'
Accounts payable	12,293	10,037
Accrued expenses	16,603	22,288
Deferred revenue, current portion	129,226	135,322
Capital lease obligations, current portion	683	905
Debt, current portion	503	519
Other liabilities	1,019	4,203
Total current liabilities	160,327	173,274
Convertible notes, net	219,714	217,965
Other liabilities, non-current	3,427	3,111
Deferred revenue, net of current portion	1,846	3,500
Capital lease obligations, net of current portion	121	218
Debt, net of current portion	269	392
Total liabilities	385,704	398,460
Commitments and contingencies (Note 9)	'	'
Stockholders' Equity:	'	'
Common stock, $0.0001 par value; 1,000,000 shares authorized, 53,094 and 52,470 shares issued and outstanding at March 31, 2014 and December 31, 2013, respectively	5	5
Additional paid-in capital	303,125	289,307
Accumulated deficit	-252,257	-236,467
Accumulated other comprehensive (loss) income	-59	50
Total stockholders’ equity	50,814	52,895
Total Liabilities and Stockholders’ Equity	$436,518	$451,355

Consolidated_Balance_Sheets_un1

Consolidated Balance Sheets (unaudited) (Parenthetical) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]	'	'
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	1,000,000,000	1,000,000,000
Common stock, shares issued	53,094,000	52,470,000
Common stock, shares outstanding	53,094,000	52,470,000

Consolidated_Statements_Of_Ope

Consolidated Statements Of Operations (unaudited) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]	'	'
Revenue	$57,409	$37,657
Cost of revenue	17,404	11,252
Gross profit	40,005	26,405
Operating expenses:	'	'
Sales and marketing	35,139	23,010
Research and development	6,883	4,419
General and administrative	10,454	8,566
Amortization of certain acquired intangible assets	251	251
Total operating expenses	52,727	36,246
Loss from operations	-12,722	-9,841
Other income (expense):	'	'
Interest income	223	0
Interest expense	-3,010	-79
Other, net	-128	-13
Other income (expense), net	-2,915	-92
Loss before income tax provision	-15,637	-9,933
Income tax provision	-153	-1
Net loss	($15,790)	($9,934)
Net loss per share, basic and diluted (USD per share)	($0.30)	($0.20)
Weighted average common shares outstanding, basic and diluted (in shares)	52,726	50,798

Consolidated_Statements_Of_Com

Consolidated Statements Of Comprehensive Loss (unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]	'	'
Net loss	($15,790)	($9,934)
Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'
Foreign currency translation adjustment	-65	713
Net change in unrealized gains (losses) on investments	-44	0
Other comprehensive (loss) income, net of tax	-109	713
Total comprehensive loss	($15,899)	($9,221)

Consolidated_Statements_Of_Cas

Consolidated Statements Of Cash Flows (unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:	'	'
Net loss	($15,790)	($9,934)
Adjustments to reconcile net loss to net cash used in operating activities:	'	'
Depreciation and amortization	3,072	2,124
Accretion of debt discount and amortization of debt issuance costs	2,031	0
Purchased investment premium, net of amortization	926	0
Unrealized foreign exchange (gain) loss	-129	286
Stock-based compensation expense	7,892	3,999
Deferred income taxes	0	-129
Changes in operating assets and liabilities:	'	'
Accounts receivable	14,897	9,552
Deferred commissions	741	-1,841
Prepaid expenses and other assets	2,504	-1,075
Accounts payable	1,088	1,248
Accrued expenses	-5,401	-3,277
Deferred revenue	-8,080	-271
Other liabilities	-2,872	-204
Net cash provided by operating activities	879	478
Cash flows from investing activities:	'	'
Purchases of investments	-17,504	0
Maturities of investments	16,012	0
Purchases of property and equipment	-3,196	-1,467
Capitalized software costs	-2,349	-1,935
Net cash used in investing activities	-7,037	-3,402
Cash flows from financing activities:	'	'
Proceeds from issuance of debt	0	1,914
Repayment of debt	-139	-361
Principal payments under capital lease obligations	-318	-459
Proceeds from stock option and warrant exercises	5,609	1,726
Net cash provided by financing activities	5,152	2,820
Effect of exchange rate changes on cash and cash equivalents	108	-168
Net decrease in cash and cash equivalents	-898	-272
Cash and cash equivalents at beginning of period	109,583	76,442
Cash and cash equivalents at end of period	108,685	76,170
Supplemental cash flow information:	'	'
Cash paid for interest	30	79
Cash paid for income taxes	151	166
Non-cash investing and financing activities:	'	'
Assets acquired under capital leases and other financing arrangements	0	88
Capitalized assets financed by accounts payable and accrued expenses	2,253	559
Capitalized stock-based compensation	$303	$208

Organization_And_Summary_Of_Si

Organization And Summary Of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization And Summary Of Significant Accounting Policies	'
	ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Company Overview
	Cornerstone OnDemand, Inc. (“Cornerstone” or the “Company”) was incorporated on May 24, 1999 in the state of Delaware and began its principal operations in November 1999.
	The Company is a leading global provider of talent management solutions delivered as Software-as-a-Service (“SaaS”). The Company’s Enterprise and Mid-Market solution is a comprehensive and unified cloud-based suite consisting of six product offerings to help organizations manage their recruiting, learning, performance, succession, compensation and enterprise social collaboration processes.
	The Company’s solutions are designed to enable organizations to meet the challenges they face in empowering and maximizing the productivity of their human capital. These challenges include hiring and developing employees throughout their careers, engaging all employees effectively, improving business execution, cultivating future leaders, and integrating with an organization’s extended enterprise of clients, vendors and distributors by delivering training, certification programs and other content. Management has determined that it operates in one segment as it only reports financial information on an aggregate and consolidated basis to its chief executive officer, who is the Company’s chief operating decision maker.
	Office Locations
	The Company is headquartered in Santa Monica, California and has offices in Auckland, Hong Kong, London, Madrid, Mumbai, Munich, Paris, Stockholm, Sydney, Tel Aviv, and Tokyo.
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with (i) United States generally accepted accounting principles (“GAAP”) for interim financial information and (ii) the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, such financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the financial statements include all adjustments (consisting of normal recurring adjustments) necessary for the fair statement of the interim periods presented. Results for the three months ended March 31, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014, for any other interim period or for any other future year.
	The condensed consolidated balance sheet at December 31, 2013 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP.
	The Company’s significant accounting policies are described in “Note 1. Summary of Significant Accounting Policies” in the the Company’s Annual Report on Form 10-K for the year ended December 31, 2013. The Company follows the same accounting policies for interim reporting. The financial information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and related notes thereto included in its Annual Report on Form 10-K for the year ended December 31, 2013.
	Recent Accounting Pronouncements
	None.

Net_Loss_Per_Share

Net Loss Per Share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Net Loss Per Share	'
	NET LOSS PER SHARE
	The following table presents our basic and diluted loss per share (in thousands, except per share amounts):
		Three Months Ended
		March 31,
		2014				2013
	Net loss	$	(15,790	)		$	(9,934	)
	Weighted-average shares of common stock outstanding	52,726				50,798
	Net loss per share – basic and diluted	$	(0.30	)		$	(0.20	)
	At March 31, 2014 and 2013, the following shares were excluded from the computation of diluted net loss per share because the effect of these shares would have been anti-dilutive (in thousands):
		March 31,
		2014			2013
	Options to purchase common stock and restricted stock units	7,518			7,191
	Convertible notes	4,682			—
	Common stock warrants	4,682			—
	Shares issued for purchase consideration held in escrow	—			16
	Common stock subject to repurchase right	—			5
	Other restricted common stock	12			31
	Total shares excluded from net loss per share	16,894			7,243
	Under the treasury stock method, the convertible notes and common stock warrants will have a dilutive impact on net earnings per share when the average stock price for the period exceeds the respective conversion prices and the Company has net income attributable to common stockholders. The Company also entered into note hedge transactions (“Note Hedges”) in connection with the convertible notes with respect to its common stock to minimize the impact of potential economic dilution upon conversion of the convertible notes. The Note Hedges were outstanding as of March 31, 2014. Since the beneficial impact of the Note Hedges were anti-dilutive, they were excluded from the calculation of diluted net income (loss) per share. See Note 6 of the Notes to Condensed Consolidated Financial Statements.

Investments

Investments	3 Months Ended
	Mar. 31, 2014
Investments [Abstract]	'
Investments	'
	. INVESTMENTS
	The Company’s investments in available-for-sale marketable securities are made within the guidelines of its investment policy, which has established guidelines relative to the diversification of the Company’s investments and their maturities, with the principle objective of capital preservation and maintaining liquidity that is sufficient to meet cash flow requirements.
	The following is a summary of investments, including cash equivalents, as of March 31, 2014 (in thousands):
		31-Mar-14
		Amortized Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
	Money market funds	$	64,881	$	—	$	—		$	64,881
	Corporate bonds	77,225		55		(4		)	77,276
	Agency bonds	123,140		35		(1		)	123,174
		$	265,246	$	90	$	(5	)	$	265,331
	The following is a summary of investments, including cash equivalents, as of December 31, 2013 (in thousands):
		December 31, 2013
		Amortized Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
	Money market funds	$	65,700	$	—	$	—		$	65,700
	Corporate bonds	78,488		121		—			78,609
	Agency bonds	121,307		14		(5		)	121,316
		$	265,495	$	135	$	(5	)	$	265,625
	As of March 31, 2014, the Company’s investment in corporate and agency bonds had a weighted-average maturity date of approximately five months. Unrealized gains and losses on investments were not significant, and the Company does not believe the unrealized losses represent other-than-temporary impairments as of March 31, 2014 and December 31, 2013.

Intangible_Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Intangible Assets	'
	INTANGIBLE ASSETS
	The Company has finite-lived intangible assets which are amortized over the estimated useful lives on a straight-line basis. The following table presents the gross carrying amount and accumulated amortization of finite-lived intangible assets as of March 31, 2014 and December 31, 2013 (in thousands):
		31-Mar-14							December 31, 2013
		Gross		Accumulated			Net		Gross		Accumulated			Net
		Carrying		Amortization			Carrying		Carrying		Amortization			Carrying
		Amount					Amount		Amount					Amount
	Developed technology	$	3,800	$	(1,887	)	$	1,913	$	3,800	$	(1,649	)	$	2,151
	Customer relationships	2,400		(1,192		)	1,208		2,400		(1,042		)	1,358
	Domains/trademarks/tradenames	320		(318		)	2		320		(278		)	42
	Software license rights	1,654		(834		)	820		1,654		(759		)	895
	Non-compete agreements	610		(485		)	125		610		(424		)	186
	Total	$	8,784	$	(4,716	)	$	4,068	$	8,784	$	(4,152	)	$	4,632
	Total amortization expense from finite-lived intangible assets was $0.6 million for the three months ended March 31, 2014 and $0.6 million for the three months ended March 31, 2013. Amortization expense of $0.3 million for the three months ended March 31, 2014 and $0.3 million for the three months ended March 31, 2013 related to developed technology and software license rights was recorded in cost of revenue and the remainder in “Amortization of certain acquired intangible assets” in the accompanying Consolidated Statements of Operations.
	The following table presents the Company’s estimate of remaining amortization expense for each of the five succeeding fiscal years ending December 31 for finite-lived intangible assets that existed at March 31, 2014 (in thousands):
	2014	$	1,514
	2015	1,840
	2016	555
	2017	146
	2018	13
	Total	$	4,068
	Estimated remaining amortization expense of $0.7 million, $1.2 million, $0.4 million, $0.1 million, and $13,000 is expected to be recorded in cost of revenue for 2014, 2015, 2016, 2017, and 2018, respectively. The remaining estimated amortization expense will be recorded in amortization of certain acquired intangible assets within operating expenses.
	The Company evaluates the recoverability of its long-lived assets with finite useful lives, including intangible assets, for impairment whenever events or changes in circumstances indicate that the carrying amounts may not be recoverable. Based on the assessment of various factors in connection with the preparation of the Company’s first quarter financial statements, the Company does not believe there were any negative qualitative factors impacting the recoverability of the carrying values. There were no impairment charges related to identifiable intangible assets in the three months ended March 31, 2014 and the year ended December 31, 2013.

Fair_Value_Of_Financial_Instru

Fair Value Of Financial Instruments	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Fair Value Of Financial Instruments	'
	FAIR VALUE OF FINANCIAL INSTRUMENTS
	Fair value represents 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 the asset or liability in an orderly transaction between market participants on the measurement date. Valuation techniques used to measure fair value must maximize the use of observable inputs and minimize the use of unobservable inputs. Observable inputs are based on market data obtained from independent sources. The fair value hierarchy is based on the following three levels of inputs, of which the first two are considered observable and the last one is considered unobservable:
	•	Level 1 – Quoted prices (unadjusted) in active markets for identical assets or liabilities that we have the ability to access at the measurement date.
	•	Level 2 – Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly.
	•	Level 3 – Unobservable inputs.
	Assets and liabilities measured at fair value on a recurring basis included the following as of March 31, 2014 and December 31, 2013 (in thousands):
		31-Mar-14								December 31, 2013
		Fair Value		Level 1		Level 2		Level 3		Fair Value		Level 1		Level 2		Level 3
	Cash equivalents	$	64,881	$	64,881	$	—	$	—	$	65,700	$	65,700	$	—	$	—
	Corporate bonds	77,276		—		77,276		—		78,609		—		78,609		—
	Agency bonds	123,174		—		123,174		—		121,316		—		121,316		—
		$	265,331	$	64,881	$	200,450	$	—	$	265,625	$	65,700	$	199,925	$	—
	At March 31, 2014 and December 31, 2013, cash equivalents of $64.9 million and $65.7 million, respectively, consisted of money market funds with original maturity dates of three months or less backed by U.S. Treasury bills.
	As of March 31, 2014, corporate and agency bonds were classified within Level 2 of the fair value hierarchy. The bonds were valued using information obtained from pricing services, which obtained quoted market prices from a variety of industry data providers, security master files from large financial institutions, and other third-party sources. The Company performed supplemental analysis to validate information obtained from its pricing services. As of March 31, 2014, no adjustments were made to such pricing information.
	Senior Convertible Notes
	The convertible notes are shown in the accompanying consolidated balance sheets at their original issuance value, net of unamortized discount, and are not re-measured to fair value each period. The approximate fair value of our convertible notes as of March 31, 2014 was $291.3 million. The fair value of the convertible notes were estimated on the basis of quoted market prices, which, due to limited trading activity, are considered Level 2 in the fair value hierarchy.

Debt

Debt	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Debt	'
	DEBT
	Senior Convertible Notes
	In 2013, the Company issued senior convertible notes (the “Notes”) raising gross proceeds of $253.0 million.
	The Notes are governed by an Indenture, dated June 17, 2013 (“Indenture”), between the Company and U.S. Bank National Association, as trustee. The Notes mature on July 1, 2018, unless earlier repurchased or converted, and bear interest at a rate of 1.50% per year payable semi-annually in arrears on January 1 and July 1 of each year, commencing January 1, 2014.
	The Notes are convertible at an initial conversion rate of 18.5046 shares of common stock per $1,000 principal amount of Notes, which represents an initial conversion price of approximately $54.04 per share, subject to adjustment for anti-dilutive issuances, voluntary increases in the conversion rate and make-whole adjustments upon a fundamental change. A fundamental change includes a change in control, delisting of the Company's stock and a liquidation of the Company. Upon conversion, the Company will deliver cash for the principal amount, and the Company has the right to settle any amounts in excess of the principal in cash or shares.
	Prior to April 1, 2018, the Notes are only convertible upon satisfaction of certain conditions as follows:
	•	during any calendar quarter after September 30, 2013, if the last reported sale price of common stock for at least 20 trading days (whether or not consecutive) during a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price on each applicable trading day;
	•	during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of the Notes for each trading day of that five consecutive trading day period was less than 98% of the product of the last reported sale price of common stock and the conversion rate on each such trading day; or
	•	upon the occurrence of specified corporate events as defined in the Indenture.
	Holders of the Notes may convert their Notes at anytime on or after April 1, 2018, until the close of business on the second scheduled trading day immediately preceding the maturity date.
	The holders of the Notes may require the Company to repurchase all or a portion of their Notes at a cash repurchase price equal to 100% of the principal amount of the Notes being repurchased, plus accrued and unpaid interest, upon a fundamental change and events of default, including non-payment of interest or principal and other obligations under the Indenture.
	In accounting for the Notes at issuance, the Company separated the Notes into debt and equity components pursuant to the accounting standards for convertible debt instruments that may be fully or partially settled in cash upon conversion. The fair value of the debt component was estimated using an interest rate for nonconvertible debt, with terms similar to the Notes, excluding the conversion feature. The carrying amount of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The excess of the principal amount of the Notes over the fair value of the debt component was recorded as a debt discount and a corresponding increase in additional paid-in capital. The debt discount is accreted to interest expense over the term of the Notes using the interest method. The amount recorded to additional paid-in capital is not to be remeasured as long as it continues to meet the conditions for equity classification. Upon issuance of the $253.0 million of Notes, the Company recorded $214.3 million to debt and $38.7 million to additional paid-in capital for the debt discount.
	The Company incurred transaction costs of approximately $7.3 million related to the issuance of the Notes. In accounting for these costs, the Company allocated the costs to the debt and equity components in proportion to the allocation of proceeds from the issuance of the Notes to such components. Transaction costs allocated to the debt component of $6.2 million are deferred as an asset and amortized to interest expense over the term of the Notes. The transaction costs allocated to the equity component of $1.1 million were recorded to additional paid-in capital. The transaction costs allocated to the debt component were recorded as deferred offering costs in other noncurrent assets.
	The net carrying amount of the liability component of the Notes as of March 31, 2014 consists of the following (in thousands):
	Principal amount	$	253,000
	Unamortized debt discount	(33,286		)
	Net carrying value	$	219,714
	The following table presents the interest expense recognized related to the Notes for the three months ended March 31, 2014 and 2013 (in thousands):
		Three Months Ended
		March 31,
		2014			2013
	Contractual interest expense at 1.5% per annum	$	949		$	—
	Amortization of debt issuance costs	281			—
	Accretion of debt discount	1,749			—
	Total	$	2,979		$	—
	The net proceeds from the Notes were approximately $246.0 million after payment of the initial purchasers' offering expenses. The Company used approximately $49.5 million of the net proceeds of the Notes offering to pay the cost of the Note Hedges described below, which was partially offset by $23.2 million of the proceeds from the Company's sale of the Warrants also described below.
	Note Hedges
	Concurrent with the issuance of the Notes, the Company entered into note hedges (“Note Hedges”) with certain bank counterparties, with respect to its common stock. The Company paid $49.5 million for the Note Hedges. The Note Hedges cover approximately 4.7 million shares of the Company's common stock at a strike price of $54.04 per share, and are exercisable by the Company upon conversion of the Notes. The Note Hedges will expire upon the maturity of the Notes. The Note Hedges are intended to reduce the potential economic dilution upon conversion of the Notes in the event that the fair value per share of the Company's common stock at the time of exercise is greater than the conversion price of the Notes.
	Warrants
	Separately and concurrently, the Company entered into warrant transactions, whereby it sold warrants to the same bank counterparties as the Note Hedges to acquire up to 4.7 million shares of the Company's common stock at a strike price of $80.06 per share (“Warrants”), subject to anti-dilution adjustments. The Company received proceeds of $23.2 million from the sale of the Warrants. The Warrants expire at various dates during 2018 and 2019. If the fair value per share of the Company's common stock exceeds the strike price of the Warrants, the Warrants will reduce diluted earnings per share to the extent that the calculation does not have an anti-dilutive effect.
	The amounts paid and received for the Note Hedges and the Warrants have been recorded in additional paid-in capital. The fair value of the Note Hedges and the Warrants are not remeasured through earnings each reporting period.
	Silicon Valley Bank
	In June 2013, concurrent with the issuance of the Notes, the Company repaid its total outstanding borrowings under the SVB Credit Facility in the amount of $3.0 million. The SVB Credit Facility was extinguished upon the June 2013 repayment.
	Other Debt Arrangements
	The Company enters into other debt arrangements with finance companies to finance the purchase of property and equipment and software. The total amounts outstanding under these arrangements were $0.8 million and $0.9 million as of March 31, 2014 and December 31, 2013, respectively.

StockBased_Awards

Stock-Based Awards	3 Months Ended
	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stockholders' Equity and Stock-Based Awards	'
	STOCK-BASED AWARDS
	Stock-Based Awards
	The following table summarizes the Company’s stock option activity for the three months ended March 31, 2014 (in thousands, except per share and term information):
		Shares		Weighted-			Weighted-	Aggregate
				Average			Average	Intrinsic
				Exercise			Remaining	Value
				Price			Contractual
							Term
	Outstanding, December 31, 2013	7,127		$	23.07		8.1	$	215,549
	Granted	380		55.61
	Exercised	(612	)	9.02
	Forfeited	(48	)	33.6
	Outstanding, March 31, 2014	6,847		$	26.05		8.1	$	155,049
		Shares		Weighted-			Weighted-	Aggregate
				Average			Average	Intrinsic
				Exercise			Remaining	Value
				Price			Contractual
							Term
	Exercisable at March 31, 2014	2,763		$	12.53		7	$	97,675
	Vested and expected to vest at March 31, 2014	6,735		25.81			8	153,952
	Unrecognized compensation expense relating to stock options was $62.3 million at March 31, 2014, which is expected to be recognized over a weighted-average period of 2.6 years.
	The aggregate grant date fair value of stock options granted during the three months ended March 31, 2014 was $10.4 million.
	Restricted Stock Awards
	In connection with the acquisition of Sonar in 2012, the Company issued 31,164 restricted shares of its common stock, valued at approximately $0.7 million, to certain Sonar shareholders who also became employees of the Company upon the acquisition. The vesting of the restricted shares is subject to continued employment, and the fair value of the restricted shares is being recognized as compensation expense over the 2 year vesting period. As of March 31, 2014, 18,698 of the issued shares were vested.
	Restricted Stock Units
	At March 31, 2014, 384,018 shares of the Company’s common stock subject to unvested restricted stock units were outstanding. Unrecognized compensation expense related to shares of the Company’s common stock subject to unvested restricted stock units was $8.1 million at March 31, 2014, which is expected to be recognized as expense over the weighted-average period of 2.0 years.
	Performance Based Options and Restricted Stock Units
	In March 2014, the Company granted additional performance-based restricted stock units. The number of awards that may be earned is based upon (a) the Company meeting certain revenue targets by December 31, 2014, and (b) the recipient continuing to provide service through each measurement date, as defined in the agreement applicable to the award. The awards vest generally over a three year period and have a term of 10 years. The Company estimated the grant date fair value for each target level at the grant date and is recognizing stock-based compensation over the vesting period using a graded vesting model based upon the revenue target that is probable of being achieved. Achievement of the probable target would result in 64,047 restricted stock units vesting. The maximum number of restricted stock units that may vest should the maximum target level become probable would be 69,000. The Company may be required to adjust compensation cost in the future to the extent that another target level becomes probable.
	The Company recognized compensation expense related to performance based awards of $0.1 million for the three months ended March 31, 2014. Unrecognized compensation expense related to unvested performance based options and restricted stock units was $3.7 million at March 31, 2014, based on the probable performance target at that date, which is expected to be recognized as expense over the weighted-average period of 2.8 years.
	Stock-Based Compensation
	Stock-based compensation expense related to stock options, restricted stock and restricted stock units is included in the following line items in the accompanying Consolidated Statement of Operations for the three months ended March 31, 2014 and 2013 (in thousands):
		Three Months Ended
		March 31,
		2014			2013
	Cost of revenue	$	743		$	428
	Sales and marketing expense	3,567			1,667
	Research and development expense	774			323
	General and administrative expense	2,808			1,564
	Total	$	7,892		$	3,982

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	INCOME TAXES
	The Company’s income tax provision was approximately $0.2 million with an effective income tax rate of 1.0% for the three months ended March 31, 2014. The Company’s effective tax rate differs from the statutory rate primarily due to the change in the valuation allowance on the Company’s deferred tax assets and foreign income taxes.
	As a result of historical losses in the U.S. and U.K., the Company recorded valuation allowances on the net deferred tax assets of the Company’s U.S. and U.K. deferred tax assets and does not anticipate recording an income tax benefit related to these deferred tax assets. The Company will reassess the realization of deferred tax assets each reporting period and will be able to reduce the valuation allowance to the extent that the financial results of these operations improve and it becomes more likely than not that the deferred tax assets are realizable.
	The Company is subject to U.S. federal income tax, state income tax and various foreign income taxes. The Company is subject to examination for years after 2009 and 2008 for its U.S. federal income tax returns and state income tax returns, respectively. The Company is subject to examination by various foreign jurisdictions for years after 2007. The Internal Revenue Service selected the U.S. federal income tax return for the year ended December 31, 2011 for examination and the audit was completed in the year ended December 31, 2013 with no material adjustments. The Company believes it has adequately reserved for its uncertain tax positions; there is no assurance, however, that taxing authorities will not propose adjustments that are more or less than the Company's expected outcome. In addition, the Company does not expect the change in uncertain tax positions to have a material impact on its financial position, results of operations or liquidity.

Commitments_And_Contingencies

Commitments And Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments And Contingencies	'
	COMMITMENTS AND CONTINGENCIES
	Guarantees and Indemnifications
	The Company has made guarantees and indemnities under which it may be required to make payments to a guaranteed or indemnified party in relation to certain transactions, including revenue transactions in the ordinary course of business. In connection with certain facility leases, the Company has agreed to indemnify its lessors for certain claims arising from the facility or the lease. The Company is obligated to indemnify its directors and officers to the maximum extent permitted under the laws of the State of Delaware. However, the Company has a directors and officers insurance policy that may reduce its exposure in certain circumstances and may enable it to recover a portion of future amounts that may be payable, if any. The duration of the guarantees and indemnities varies and, in many cases, is indefinite but subject to statutes of limitations. To date, the Company has made no payments related to these guarantees and indemnities. The Company estimates the fair value of its indemnification obligations as insignificant based on this history and the Company’s insurance coverage and therefore has not recorded any liability for these guarantees and indemnities in the accompanying consolidated balance sheets.
	Lease Commitments
	The Company did not enter into any new significant lease agreements during the three months ended March 31, 2014.
	Litigation
	During 2012, the Company received an unfavorable ruling in arbitration related to an employment matter. Based on this ruling, the Company has estimated the probable loss for this matter, including both the award and estimated plaintiff attorneys' fees, to be approximately $2.6 million and accrued this amount within other current liabilities. The Company has determined that insurance recovery for this loss is probable, and has recorded a related receivable in other current assets for this matter. In March 2014, the insurance company paid the judgment amount plus accrued post-judgment interest to the Superior Court of California to satisfy the judgment and terminate the further accrual of post-judgment interest. The Company has filed a notice of appeal, and plans to proceed with its appeal, but believes the possibility of any additional significant loss to be remote.
	The Company is subject to various legal proceedings and claims that arise in the ordinary course of business. If the Company determines that it is probable that a loss has been incurred and the amount is reasonably estimable, the Company will record a liability. Except for the matter described above, the Company has determined that it does not have a potential liability related to any legal proceedings or claims that would individually or in the aggregate materially adversely affect its financial conditions or operating results.

Related_Party_Transactions_Not

Related Party Transactions (Notes)	3 Months Ended
	Mar. 31, 2014
Related Party Transactions [Abstract]	'
Related Party Transactions	'
	RELATED PARTY TRANSACTIONS
	In 2010, the Cornerstone OnDemand Foundation, or the Foundation, was formed to empower communities in the United States and Internationally by increasing the impact of the non-profit sector through the utilization of talent management technology including the Company’s Enterprise and Mid-Market solution. The Company’s CEO is on the Board of Directors of the Foundation. The Company does not direct the Foundation’s activities, and accordingly, the Company does not consolidate the Foundation’s statement of activities with its financial results. During the three months ended March 31, 2014, the Company has provided at no charge certain resources to the Foundation, with approximate value of $0.5 million.

Subsequent_Events

Subsequent Events	3 Months Ended
	Mar. 31, 2014
Subsequent Events [Abstract]	'
Subsequent Events	'
	SUBSEQUENT EVENTS
	During April and May 2014, the Compensation Committee of the Board of Directors granted stock options to purchase 315,629 shares of the Company’s common stock at a weighted-average exercise price of $43.98 per share. The stock options vest over four years. During April and May 2014, the Compensation Committee of the Board of Directors granted 34,750 shares of the Company’s common stock subject to restricted stock units which vest annually over four years.

Organization_And_Summary_Of_Si1

Organization And Summary Of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Basis of Presentation	'
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with (i) United States generally accepted accounting principles (“GAAP”) for interim financial information and (ii) the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, such financial statements do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, the financial statements include all adjustments (consisting of normal recurring adjustments) necessary for the fair statement of the interim periods presented. Results for the three months ended March 31, 2014 are not necessarily indicative of the results that may be expected for the year ending December 31, 2014, for any other interim period or for any other future year.
	The condensed consolidated balance sheet at December 31, 2013 has been derived from the audited financial statements at that date, but does not include all of the disclosures required by GAAP.
	The Company’s significant accounting policies are described in “Note 1. Summary of Significant Accounting Policies” in the the Company’s Annual Report on Form 10-K for the year ended December 31, 2013. The Company follows the same accounting policies for interim reporting. The financial information included in this Quarterly Report on Form 10-Q should be read in conjunction with the Company’s consolidated financial statements and related notes thereto included in its Annual Report on Form 10-K for the year ended December 31, 2013.
Recent Accounting Pronouncements	'
	Recent Accounting Pronouncements
	None.

Net_Loss_Per_Share_Tables

Net Loss Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Basic and Diluted Loss Per Share Attributable to Common Stockholders	'
	The following table presents our basic and diluted loss per share (in thousands, except per share amounts):
		Three Months Ended
		March 31,
		2014				2013
	Net loss	$	(15,790	)		$	(9,934	)
	Weighted-average shares of common stock outstanding	52,726				50,798
	Net loss per share – basic and diluted	$	(0.30	)		$	(0.20	)
Anti-Dilutive Shares Excluded from Calculation of Diluted Net Loss Per Share	'
	At March 31, 2014 and 2013, the following shares were excluded from the computation of diluted net loss per share because the effect of these shares would have been anti-dilutive (in thousands):
		March 31,
		2014			2013
	Options to purchase common stock and restricted stock units	7,518			7,191
	Convertible notes	4,682			—
	Common stock warrants	4,682			—
	Shares issued for purchase consideration held in escrow	—			16
	Common stock subject to repurchase right	—			5
	Other restricted common stock	12			31
	Total shares excluded from net loss per share	16,894			7,243

Investments_Tables

Investments (Tables)	3 Months Ended
	Mar. 31, 2014
Investments [Abstract]	'
Marketable Securities	'
	The following is a summary of investments, including cash equivalents, as of March 31, 2014 (in thousands):
		31-Mar-14
		Amortized Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
	Money market funds	$	64,881	$	—	$	—		$	64,881
	Corporate bonds	77,225		55		(4		)	77,276
	Agency bonds	123,140		35		(1		)	123,174
		$	265,246	$	90	$	(5	)	$	265,331
	The following is a summary of investments, including cash equivalents, as of December 31, 2013 (in thousands):
		December 31, 2013
		Amortized Cost Basis		Unrealized Gains		Unrealized Losses			Fair Value
	Money market funds	$	65,700	$	—	$	—		$	65,700
	Corporate bonds	78,488		121		—			78,609
	Agency bonds	121,307		14		(5		)	121,316
		$	265,495	$	135	$	(5	)	$	265,625

Intangible_Assets_Tables

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Gross Carrying Value and Accumulated Amortization of Definite-lived Intangible Assets	'
	The following table presents the gross carrying amount and accumulated amortization of finite-lived intangible assets as of March 31, 2014 and December 31, 2013 (in thousands):
		31-Mar-14							December 31, 2013
		Gross		Accumulated			Net		Gross		Accumulated			Net
		Carrying		Amortization			Carrying		Carrying		Amortization			Carrying
		Amount					Amount		Amount					Amount
	Developed technology	$	3,800	$	(1,887	)	$	1,913	$	3,800	$	(1,649	)	$	2,151
	Customer relationships	2,400		(1,192		)	1,208		2,400		(1,042		)	1,358
	Domains/trademarks/tradenames	320		(318		)	2		320		(278		)	42
	Software license rights	1,654		(834		)	820		1,654		(759		)	895
	Non-compete agreements	610		(485		)	125		610		(424		)	186
	Total	$	8,784	$	(4,716	)	$	4,068	$	8,784	$	(4,152	)	$	4,632
Estimate Amortization Expense for Definite-Lived Intangible Assets	'
	The following table presents the Company’s estimate of remaining amortization expense for each of the five succeeding fiscal years ending December 31 for finite-lived intangible assets that existed at March 31, 2014 (in thousands):
	2014	$	1,514
	2015	1,840
	2016	555
	2017	146
	2018	13
	Total	$	4,068

Fair_Value_Of_Financial_Instru1

Fair Value Of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2014
Fair Value Disclosures [Abstract]	'
Assets and Liabilities Measured at Fair Value on a Recurring Basis	'
	Assets and liabilities measured at fair value on a recurring basis included the following as of March 31, 2014 and December 31, 2013 (in thousands):
		31-Mar-14								December 31, 2013
		Fair Value		Level 1		Level 2		Level 3		Fair Value		Level 1		Level 2		Level 3
	Cash equivalents	$	64,881	$	64,881	$	—	$	—	$	65,700	$	65,700	$	—	$	—
	Corporate bonds	77,276		—		77,276		—		78,609		—		78,609		—
	Agency bonds	123,174		—		123,174		—		121,316		—		121,316		—
		$	265,331	$	64,881	$	200,450	$	—	$	265,625	$	65,700	$	199,925	$	—

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2014
Debt Disclosure [Abstract]	'
Convertible Debt Costs	'
	The net carrying amount of the liability component of the Notes as of March 31, 2014 consists of the following (in thousands):
	Principal amount	$	253,000
	Unamortized debt discount	(33,286		)
	Net carrying value	$	219,714
Schedule of Debt cost and interest expense recognized	'
	The following table presents the interest expense recognized related to the Notes for the three months ended March 31, 2014 and 2013 (in thousands):
		Three Months Ended
		March 31,
		2014			2013
	Contractual interest expense at 1.5% per annum	$	949		$	—
	Amortization of debt issuance costs	281			—
	Accretion of debt discount	1,749			—
	Total	$	2,979		$	—

StockBased_Awards_Tables

Stock-Based Awards (Tables)	3 Months Ended
	Mar. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Summary of Stock Option Activity	'
	The following table summarizes the Company’s stock option activity for the three months ended March 31, 2014 (in thousands, except per share and term information):
		Shares		Weighted-			Weighted-	Aggregate
				Average			Average	Intrinsic
				Exercise			Remaining	Value
				Price			Contractual
							Term
	Outstanding, December 31, 2013	7,127		$	23.07		8.1	$	215,549
	Granted	380		55.61
	Exercised	(612	)	9.02
	Forfeited	(48	)	33.6
	Outstanding, March 31, 2014	6,847		$	26.05		8.1	$	155,049
		Shares		Weighted-			Weighted-	Aggregate
				Average			Average	Intrinsic
				Exercise			Remaining	Value
				Price			Contractual
							Term
	Exercisable at March 31, 2014	2,763		$	12.53		7	$	97,675
	Vested and expected to vest at March 31, 2014	6,735		25.81			8	153,952
Stock-Based Compensation Expense Related to Stock Options and Restricted Stock Units	'
	Stock-based compensation expense related to stock options, restricted stock and restricted stock units is included in the following line items in the accompanying Consolidated Statement of Operations for the three months ended March 31, 2014 and 2013 (in thousands):
		Three Months Ended
		March 31,
		2014			2013
	Cost of revenue	$	743		$	428
	Sales and marketing expense	3,567			1,667
	Research and development expense	774			323
	General and administrative expense	2,808			1,564
	Total	$	7,892		$	3,982

Organization_And_Summary_Of_Si2

Organization And Summary Of Significant Accounting Policies - Narrative (Detail)	3 Months Ended
	Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Date of incorporation	24-May-99
State of incorporation	'Delaware
Principal operation beginning date	'1999-11

Net_Loss_Per_Share_Basic_and_D

Net Loss Per Share - Basic and Diluted Loss Per Share Attributable to Common Stockholders (Detail) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]	'	'
Net loss	($15,790)	($9,934)
Weighted-average shares of common stock outstanding (in shares)	52,726	50,798
Net loss per share, basic and diluted (USD per share)	($0.30)	($0.20)

Net_Loss_Per_Share_Antidilutiv

Net Loss Per Share - Anti-dilutive Shares Excluded From Calculation of Diluted Net Loss Per Share Attributable to Common Stockholders (Detail)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	16,894	7,243
Options to purchase common stock and restricted stock units	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	7,518	7,191
Convertible notes	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	4,682	0
Shares issued for purchase consideration held in escrow	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	0	16
Common stock subject to repurchase right	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	0	5
Other restricted common stock	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	12	31
Common Stock | Common stock warrants	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total shares excluded from net loss per share	4,682	0

Investments_Marketable_Securit

Investments - Marketable Securities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	$265,246	$265,495
Available For Sale Securities Gross Unrealized Gain Accumulated In Investments	90	135
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	-5	-5
Available-for-sale Securities	265,331	265,625
Money market funds	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	64,881	65,700
Available For Sale Securities Gross Unrealized Gain Accumulated In Investments	0	0
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	0	0
Available-for-sale Securities	64,881	65,700
Corporate bonds	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	77,225	78,488
Available For Sale Securities Gross Unrealized Gain Accumulated In Investments	55	121
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	-4	0
Available-for-sale Securities	77,276	78,609
Agency bonds	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Available-for-sale Securities, Amortized Cost Basis	123,140	121,307
Available For Sale Securities Gross Unrealized Gain Accumulated In Investments	35	14
Available For Sale Securities Gross Unrealized Loss Accumulated In Investments	-1	-5
Available-for-sale Securities	$123,174	$121,316

Intangible_Assets_Gross_Carryi

Intangible Assets - Gross Carrying Amount and Accumulated Amortization of Finite-lived Intangible Assets (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	$8,784	$8,784
Accumulated Amortization	-4,716	-4,152
Net Carrying Amount	4,068	4,632
Developed technology	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	3,800	3,800
Accumulated Amortization	-1,887	-1,649
Net Carrying Amount	1,913	2,151
Customer relationships	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	2,400	2,400
Accumulated Amortization	-1,192	-1,042
Net Carrying Amount	1,208	1,358
Domains/trademarks/tradenames	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	320	320
Accumulated Amortization	-318	-278
Net Carrying Amount	2	42
Software license rights	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	1,654	1,654
Accumulated Amortization	-834	-759
Net Carrying Amount	820	895
Non-compete agreements	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'
Gross Carrying Amount	610	610
Accumulated Amortization	-485	-424
Net Carrying Amount	$125	$186

Intangible_Assets_Estimated_Am

Intangible Assets - Estimated Amortization Expense for Definite-Lived Intangible Assets (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Expected Amortization Expense [Line Items]	'	'
2014	$1,514	'
2015	1,840	'
2016	555	'
2017	146	'
2018	13	'
Net Carrying Amount	4,068	4,632
Cost of revenues	'	'
Expected Amortization Expense [Line Items]	'	'
2014	700	'
2015	1,200	'
2016	400	'
2017	100	'
2018	$13	'

Intangible_Assets_Changes_in_C

Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'	'
Asset Impairment Charges	$0	$0

Intangible_Assets_Narrative_De

Intangible Assets - Narrative (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Cost of revenues	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization expense	$0.30	$0.30
Finite-lived Intangible Assets	'	'
Finite-Lived Intangible Assets [Line Items]	'	'
Amortization expense	$0.60	$0.60

Fair_Value_Of_Financial_Instru2

Fair Value Of Financial Instruments - Measurement of Asset and Liabilities at Fair Value on Recurring Basis (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	$265,331	$265,625
Assets, Fair Value Disclosure	265,331	265,625
Fair value measurements, recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Cash equivalents	64,881	65,700
Fair value measurements, recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Cash equivalents	64,881	65,700
Assets, Fair Value Disclosure	64,881	65,700
Fair value measurements, recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Cash equivalents	0	0
Assets, Fair Value Disclosure	200,450	199,925
Fair value measurements, recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Cash equivalents	0	0
Assets, Fair Value Disclosure	0	0
Corporate bonds	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	77,276	78,609
Corporate bonds | Fair value measurements, recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	77,276	78,609
Corporate bonds | Fair value measurements, recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
Corporate bonds | Fair value measurements, recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	77,276	78,609
Corporate bonds | Fair value measurements, recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
Agency bonds	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	123,174	121,316
Agency bonds | Fair value measurements, recurring	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	123,174	121,316
Agency bonds | Fair value measurements, recurring | Level 1	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	0	0
Agency bonds | Fair value measurements, recurring | Level 2	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	123,174	121,316
Agency bonds | Fair value measurements, recurring | Level 3	'	'
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]	'	'
Available-for-sale Securities	$0	$0

Fair_Value_Of_Financial_Instru3

Fair Value Of Financial Instruments - Narrative (Detail) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Fair Value Disclosures [Abstract]	'	'
Money market fund value	$64.90	$65.70
Convertible Debt, Fair Value Disclosures	$291.30	'

Debt_Amounts_Recorded_Within_t

Debt - Amounts Recorded Within the Company Financials (Details) (Convertible Debt, USD $)	Mar. 31, 2014	Jun. 17, 2013
In Thousands, unless otherwise specified
Convertible Debt	'	'
Debt Instrument [Line Items]	'	'
Principal amount	$253,000	'
Unamortized debt discount	-33,286	'
Net carrying value	$219,714	$214,300

Debt_Debt_Cost_and_Interest_Ex

Debt - Debt Cost and Interest Expense Recognized (Details) (Convertible Debt, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Convertible Debt	'	'
Schedule of Debt Cost and Interest Expense Recognized [Line Items]	'	'
Contractual interest expense at 1.5% per annum	$949	$0
Amortization of debt issuance costs	281	0
Accretion of debt discount	1,749	0
Total	$2,979	$0

Debt_Narrative_Detail

Debt - Narrative (Detail) (USD $)	0 Months Ended	12 Months Ended	1 Months Ended			0 Months Ended		0 Months Ended
	Jun. 17, 2013	Dec. 31, 2013	Jun. 30, 2013	Mar. 31, 2014	Dec. 31, 2013	Jun. 17, 2013	Mar. 31, 2014	Jun. 17, 2013	Jun. 17, 2013
			Amended SVB Credit Facility	Other Debt Arrangements	Other Debt Arrangements	Convertible notes	Convertible notes	Prior to April 1, 2018	Prior to April 1, 2018
			Silicon Valley Bank					Maximum	Minimum
								Convertible notes	Convertible notes
								D	trading_day
Debt Instrument [Line Items]	'	'	'	'	'	'	'	'	'
Debt gross proceeds	'	'	'	'	'	$253,000,000	'	'	'
Debt interest rate	'	'	'	'	'	1.50%	'	'	'
Initiate conversion rate (shares)	'	'	'	'	'	18.5046	'	'	'
Conversion price ($ per share)	$54.04	'	'	'	'	'	'	'	'
Convertible debt, conversion trigger, minimum number of trading days	'	'	'	'	'	'	'	20	5
Convertible debt, conversion trigger, consecutive trading days	'	'	'	'	'	'	'	'30 days	'5 days
Convertible debt, conversion trigger, market price vs conversion price	'	'	'	'	'	'	'	130.00%	98.00%
Convertible senior notes	'	'	'	'	'	214,300,000	219,714,000	'	'
Amount recorded in additional paid-in capital for the equity portion of the convertible note	'	'	'	'	'	38,700,000	'	'	'
Transaction costs related to the issuance of the Notes	'	'	'	'	'	7,300,000	'	'	'
Deferred debt issuance cost	'	'	'	'	'	6,200,000	'	'	'
Equity issuance cost	'	'	'	'	'	1,100,000	'	'	'
Net proceeds from the Notes	'	'	'	'	'	246,000,000	'	'	'
Payment for the Note Hedge	49,500,000	'	'	'	'	'	'	'	'
Number of shares covered by the Note Hedge	4,700,000	'	'	'	'	'	'	'	'
Number of shares that can be acquired by warrants holders	'	4,700,000	'	'	'	'	'	'	'
Warrant strike price per share	'	80.06	'	'	'	'	'	'	'
Proceeds from warrants issuance	'	23,225,000	'	'	'	'	'	'	'
Repayments of lines of credit	'	'	3,000,000	'	'	'	'	'	'
Debt instrument, amount outstanding	'	'	'	$800,000	$900,000	'	'	'	'

StockBased_Awards_Stock_Option

Stock-Based Awards - Stock Option Activity (Detail) (USD $)	3 Months Ended	12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]	'	'	'
Outstanding, December 31, 2013	7,127	'	'
Options, Granted	380	'	'
Options, Exercised	-612	'	'
Options, Forfeited	-48	'	'
Outstanding, March 31, 2014	6,847	7,127	'
Exercisable at March 31, 2014	'	'	2,763
Vested and expected to vest at March 31, 2014	'	'	6,735
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]	'	'	'
Weighted-Average Exercise Price, Outstanding, December 31, 2012	$23.07	'	'
Weighted-Average Exercise Price, Granted	$55.61	'	'
Weighted-Average Exercise Price, Exercised	$9.02	'	'
Weighted-Average Exercise Price, Forfeited	$33.60	'	'
Weighted-Average Exercise Price, Outstanding, September 30, 2013	$26.05	$23.07	'
Weighted-Average Exercise Price, Exercisable at September 30, 2013	$12.53	'	'
Weighted-Average Exercise Price, Vested and expected to vest at September 30, 2013	$25.81	'	'
Weighted-Average Remaining Contractual Term, Outstanding, December 31, 2012	'8 years 1 month 6 days	'8 years 1 month 6 days	'
Weighted-Average Remaining Contractual Term, Outstanding, September 30, 2013	'8 years 1 month 6 days	'8 years 1 month 6 days	'
Weighted-Average Remaining Contractual Term, Exercisable at September 30, 2013	'7 years	'	'
Weighted-Average Remaining Contractual Term, Vested and expected to vest at September 30, 2013	'8 years	'	'
Aggregate Intrinsic Value, Outstanding, December 31, 2012	$215,549	'	'
Aggregate Intrinsic Value, Outstanding, September 30, 2013	155,049	215,549	'
Aggregate Intrinsic Value, Exercisable at September 30, 2013	97,675	'	'
Aggregate intrinsic value, vested and expected to vest, exercisable at September 30, 2013	$153,952	'	'

StockBased_Awards_StockBased_C

Stock-Based Awards - Stock-Based Compensation Expense Related to Stock Options and Restricted Stock Units Accompanying Statement of Operation (Detail) (Stock Options And Restricted Stock Units, USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Share based compensation expense	$7,892	$3,982
Cost of revenue	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Share based compensation expense	743	428
Sales and marketing expense	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Share based compensation expense	3,567	1,667
Research and development expense	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Share based compensation expense	774	323
General and administrative expense	'	'
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'
Share based compensation expense	$2,808	$1,564

StockBased_Awards_Narrative_De

Stock-Based Awards - Narrative (Detail) (USD $)	3 Months Ended						0 Months Ended
	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Mar. 31, 2014	Jun. 17, 2013	Mar. 31, 2014	Mar. 31, 2014
		Restricted Stock Units (RSUs)	Restricted Stock	Restricted Stock	Performance Based Restricted Stock Units	Performance Shares	Convertible notes	Minimum	Maximum
			Sonar Limited	Sonar Limited				Performance Based Restricted Stock Units	Performance Based Restricted Stock Units
				Restricted Stock Shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]	'	'	'	'	'	'	'	'	'
Adjustments to additional paid in capital, note discount	'	'	'	'	'	'	$38,700,000	'	'
Unrecognized compensation expense relating to stock options	62,300,000	'	'	'	'	'	'	'	'
Unrecognized compensation expense, expected recognition weighted average period	'2 years 7 months 21 days	'2 years 0 months 15 days	'	'	'	'2 years 10 months 2 days	'	'	'
Share-based Compensation Arrangement by Share-based Payment Awards, Performance Awards, Expected to Vest	'	'	'	'	'	'	'	64,047	69,000
Aggregate grant date fair value of stock options granted	10,400,000	'	'	'	'	'	'	'	'
Restricted stock units granted (in shares)	'	'	'	31,164	'	'	'	'	'
Restricted stock units granted (in dollars)	'	'	'	700,000	'	'	'	'	'
Share-based payment award, award vesting period	'	'	'2 years	'	'3 years	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	'	'	'	'	'10 years	'	'	'	'
Share-based Payment Award, shares vested	'	'	18,698	'	'	'	'	'	'
Share of non-vested restricted stock units were outstanding	'	384,018	'	'	'	'	'	'	'
Unrecognized compensation expense related to non-vested restricted stock units	'	8,100,000	'	'	'	'	'	'	'
Allocated Share-based Compensation Expense	'	'	'	'	'	138,000	'	'	'
Unrecognized compensation expense related to nonvested performance based options and restricted stock units	'	'	'	'	'	$3,700,000	'	'	'

Income_Taxes_Narrative_Detail

Income Taxes - Narrative (Detail) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Income Tax Examination [Line Items]	'	'
Income tax (benefit) expenses	$153	$1
Effective income tax rate	-1.00%	'
Federal income tax returns	'	'
Income Tax Examination [Line Items]	'	'
Income tax examination year	'2009	'
State income tax returns	'	'
Income Tax Examination [Line Items]	'	'
Income tax examination year	'2008	'

Commitments_And_Contingencies_

Commitments And Contingencies - Narrative (Detail) (USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Commitments and Contingencies Disclosure [Abstract]	'
Loss contingency accrual, at carrying value	$2.60

Related_Party_Transactions_Det

Related Party Transactions (Details) (USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Related Party Transactions [Abstract]	'
Value Of Resources Donated To Related Parties	$0.50

Subsequent_Events_Narrative_De

Subsequent Events - Narrative (Detail) (USD $)	3 Months Ended	1 Months Ended
	Mar. 31, 2014	6-May-14	6-May-14
		Subsequent Event [Member]	Subsequent Event [Member]
		Stock Options	Restricted Stock Units (RSUs)
Subsequent Event [Line Items]	'	'	'
Common stock options granted (in number of options)	380,000	315,629	34,750
Stock option exercise price per share (in usd per share)	$55.61	$43.98	'
Vesting period	'	'4 years	'4 years