ServiceNow (NOW) 10-Q 7 Aug 14 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Jul. 31, 2014
Document and Entity Information [Abstract]	'	'
Entity Registrant Name	'SERVICENOW, INC.	'
Trading Symbol	'NOW	'
Entity Central Index Key	'0001373715	'
Document Type	'10-Q	'
Document Period End Date	30-Jun-14	'
Amendment Flag	'false	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Large Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	145.7

Condensed_Consolidated_Balance

Condensed Consolidated Balance Sheets (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$329,275	$366,303
Available-for-sale Securities, Current	348,205	268,251
Accounts receivable, net	109,246	108,339
Current portion of deferred commissions	34,105	31,123
Prepaid expenses and other current assets	23,828	23,733
Total current assets	844,659	797,749
Deferred commissions, less current portion	22,484	21,318
Long-term investments	279,580	255,356
Property and equipment, net	96,483	75,560
Intangible Assets, Net (Excluding Goodwill)	5,290	5,796
Goodwill	8,622	8,724
Other assets	5,125	3,973
Total assets	1,262,243	1,168,476
Current liabilities:	'	'
Accounts payable	22,463	7,405
Accrued expenses and other current liabilities	64,297	68,130
Current portion of deferred revenue	316,287	252,553
Total current liabilities	403,047	328,088
Deferred revenue, less current portion	12,565	14,169
Convertible senior notes, net	429,025	414,777
Other long-term liabilities	19,489	17,183
Total liabilities	864,126	774,217
Stockholders’ equity:	'	'
Common stock	145	140
Additional paid-in capital	670,242	573,791
Accumulated other comprehensive income (loss)	600	-476
Accumulated deficit	-272,870	-179,196
Total stockholders’ equity	398,117	394,259
Total liabilities and stockholders’ equity	$1,262,243	$1,168,476

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Comprehensive Loss (USD $)	3 Months Ended				6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Revenues:	'		'		'		'
Subscription	$132,724		$80,376		$250,099		$151,934
Professional services and other	34,033		21,846		55,748		36,227
Total revenues	166,757		102,222		305,847		188,161
Cost of revenues(1):	'		'		'		'
Subscription	33,243	[1]	20,219	[1]	64,432	[1]	38,531	[1]
Professional services and other	25,695	[1]	15,779	[1]	47,620	[1]	29,775	[1]
Total cost of revenues	58,938	[1]	35,998	[1]	112,052	[1]	68,306	[1]
Gross profit	107,819		66,224		193,795		119,855
Operating expenses(1):	'		'		'		'
Sales and marketing	91,937	[1]	52,291	[1]	161,353	[1]	90,517	[1]
Research and development	35,439	[1]	17,951	[1]	66,549	[1]	33,990	[1]
General and administrative	24,914	[1]	15,325	[1]	46,545	[1]	27,604	[1]
Total operating expenses	152,290	[1]	85,567	[1]	274,447	[1]	152,111	[1]
Loss from operations	-44,471		-19,343		-80,652		-32,256
Interest and other income (expense), net	-5,231		-1,323		-11,194		-1,204
Loss before provision for income taxes	-49,702		-20,666		-91,846		-33,460
Provision for income taxes	661		739		1,828		1,303
Net loss	-50,363		-21,405		-93,674		-34,763
Earnings Per Share, Basic and Diluted	($0.35)		($0.16)		($0.65)		($0.26)
Net loss attributable to common stockholders - basic	-50,363		-21,405		-93,674		-34,763
Net loss attributable to common stockholders - diluted	-50,363		-21,405		-93,674		-34,763
Weighted-average shares used to compute net loss per share - basic and diluted	144,456,675		134,454,085		143,267,181		132,298,095
Other comprehensive income (loss):	'		'		'		'
Foreign currency translation adjustments	511		-201		686		-1,367
Unrealized gain (loss) on investments	365		-475		390		-429
Other comprehensive income (loss), net of tax	876		-676		1,076		-1,796
Comprehensive loss	($49,487)		($22,081)		($92,598)		($36,559)
[1]	Includes stock-based compensation as follows: Three Months Ended June 30, Six Months Ended June 30, 2014 2013 2014 2013Cost of revenues: Subscription$3,825 $1,996 $6,901 $3,790Professional services and other3,224 1,065 5,616 1,886Sales and marketing12,383 4,822 21,426 8,807Research and development10,452 3,715 18,291 6,829General and administrative7,720 3,230 14,599 5,562

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Loss (Parenthetical) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Stock-based compensation	$37,604	$14,828	$66,833	$26,874
Subscription [Member]	'	'	'	'
Stock-based compensation	3,825	1,996	6,901	3,790
Professional services and other [Member]	'	'	'	'
Stock-based compensation	3,224	1,065	5,616	1,886
Sales and marketing [Member]	'	'	'	'
Stock-based compensation	12,383	4,822	21,426	8,807
Research and development [Member]	'	'	'	'
Stock-based compensation	10,452	3,715	18,291	6,829
General and administrative [Member]	'	'	'	'
Stock-based compensation	$7,720	$3,230	$14,599	$5,562

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:	'	'
Net loss	($93,674)	($34,763)
Adjustments to reconcile net loss to net cash provided by operating activities:	'	'
Depreciation and amortization	16,630	9,703
Accretion (Amortization) of Discounts and Premiums, Investments	3,859	2,233
Amortization of deferred commissions	23,635	11,997
Amortization of debt discount and issuance cost	14,283	0
Stock-based compensation	66,833	26,874
Tax benefit from exercise of stock options	-617	-2,571
Other Operating Activities, Cash Flow Statement	-1,590	913
Changes in operating assets and liabilities:	'	'
Accounts receivable	-2,098	-15,891
Deferred commissions	-27,966	-20,780
Prepaid expenses and other assets	-1,101	5,595
Accounts payable	10,976	-125
Accrued expenses and other liabilities	63,312	40,574
Deferred revenue	-6,206	1,000
Net cash provided by operating activities	66,276	24,759
Cash flows from investing activities:	'	'
Purchases of property and equipment	-27,405	-22,235
Purchases of investments	-241,312	-184,763
Sale of investments	68,893	43,298
Maturities of investments	67,168	107,451
Restricted cash	-55	-163
Net cash used in investing activities	-132,711	-56,412
Cash flows from financing activities:	'	'
Offering costs in connection with follow-on offering	0	-698
Proceeds from Issuance of Common Stock	28,811	31,830
Tax benefit from exercise of stock options	617	2,571
Net cash provided by financing activities	29,428	33,703
Foreign currency effect on cash and cash equivalents	-21	-806
Net increase (decrease) in cash and cash equivalents	-37,028	1,244
Cash and cash equivalents at beginning of period	366,303	118,989
Cash and cash equivalents at end of period	329,275	120,233
Supplemental disclosures of non-cash investing activities:	'	'
Property and equipment included in accounts payable and accrued expenses	$12,669	$5,756

Description_of_Business

Description of Business	6 Months Ended
	Jun. 30, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Description of Business	'
	Description of the Business
	ServiceNow is a leading provider of cloud-based services to automate and manage IT service relationships across the global enterprise. Our services include a suite of IT service automation applications built on our proprietary platform that can be rapidly deployed and configured. Customers use our services to create a single system of record for enterprise IT, automate manual tasks, standardize processes and consolidate legacy systems. Using ServiceNow, enterprise IT departments can accelerate their shift from the management of IT infrastructure to the management of IT service relationships across the enterprise with greater transparency, accountability and auditability. Our proprietary platform enables our customers to create custom applications and evolve the IT service model to service domains inside and outside the enterprise.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	Summary of Significant Accounting Policies
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements and condensed footnotes have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring items) considered necessary for fair financial statement presentation have been included. The results of operations for the three and six months ended June 30, 2014 are not necessarily indicative of the results to be expected for the year ended December 31, 2014 or for other interim periods or for future years. The condensed consolidated balance sheet as of December 31, 2013 is derived from audited financial statements as of that date, however, does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s Form 10-K for the year ended December 31, 2013, which was filed with the Securities and Exchange Commission on February 28, 2014.
	Principles of Consolidation
	The condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, or GAAP, and include our accounts and the accounts of our wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated upon consolidation.
	Use of Estimates
	The preparation of consolidated financial statements in conformity with GAAP requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, as well as reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
	Concentration of Credit Risk and Significant Customers
	Financial instruments potentially exposing us to credit risk consist primarily of cash equivalents, investments and accounts receivable. We maintain cash, cash equivalents and investments at financial institutions that management believes to have good credit ratings and represent minimal risk of loss of principal. We invest in securities issued by financial-sector firms with a minimum rating of A by Standard & Poor's and A2 by Moody's and securities issued by non-financial sector firms with a minimum rating of BBB by Standard & Poor's and Baa1 by Moody's.
	Credit risk arising from accounts receivable is mitigated due to our large number of customers and their dispersion across various industries and geographies. As of June 30, 2014 and December 31, 2013, there were no customers that represented more than 10% of our accounts receivable balance. During the three and six months ended June 30, 2014 and 2013, there were no customers that individually exceeded 10% of our revenues.
	We review the composition of the accounts receivable balance, historical write-off experience and the potential risk of loss associated with delinquent accounts to determine if an allowance for doubtful accounts is necessary. Individual accounts receivable are written off when we become aware of a specific customer’s inability to meet its financial obligation and all collection efforts are exhausted. As of June 30, 2014 and December 31, 2013, the allowance for doubtful accounts was $1.7 million and $1.1 million, respectively.
	Warranties and Indemnification
	Our cloud-based service to automate enterprise IT operations is typically warranted to perform in material conformance with specifications.
	We include service level commitments to our customers that permit those customers to receive credits in the event we fail to meet those levels. We establish an accrual based on historical credits paid and an evaluation of the performance of our services, including an assessment of the impact of any known service disruptions. Service level credit accrual charges are recorded against revenue. As of June 30, 2014 and December 31, 2013, the service level credit accrual was $1.0 million and $0.6 million, respectively.
	We have also agreed to indemnify our directors and executive officers for costs associated with any fees, expenses, judgments, fines and settlement amounts incurred by any of these persons in any action or proceeding to which any of those persons is, or is threatened to be, made a party by reason of the person’s service as a director or officer, including any action by us, arising out of that person’s services as a director or officer of our company or that person’s services provided to any other company or enterprise at our request. We maintain director and officer insurance coverage that may enable us to recover a portion of any future amounts paid.
	Our arrangements include provisions indemnifying customers against intellectual property and other third-party claims. We have not incurred any costs as a result of such indemnifications and have not recorded any liabilities related to such obligations in the condensed consolidated financial statements.
	Recent Accounting Pronouncement
	In May 2014, the Financial Accounting Standards Board ("FASB") issued an update to ASC 606 Revenue from Contracts with Customers (“ASC 606”) that will supersede virtually all existing revenue guidance. Under this update, an entity is required to recognize revenue upon transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. As such, an entity will need to use more judgment and make more estimates than under the current guidance. This update should be applied retrospectively either to each prior reporting period presented in the financial statements, or only to the most current reporting period presented in the financial statements with a cumulative effect adjustment recorded in the retained earnings. This guidance will become effective for us for our interim and annual reporting periods beginning January 1, 2017. We are currently evaluating the impact of this update on our consolidated financial statements.

Investments

Investments	6 Months Ended
	Jun. 30, 2014
Available-for-sale Securities [Abstract]	'
Investments	'
	Investments
	The following is a summary of our investments (in thousands):
		30-Jun-14
		Amortized		Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
	Available-for-sale securities:
	Commercial paper	$	63,018	$	6		$	(6	)	$	63,018
	Corporate notes, bonds and certificate of deposit	554,612		333			(187		)	554,758
	U.S. government agency securities	10,007		2			—			10,009
	Total available-for-sale securities	$	627,637	$	341		$	(193	)	$	627,785
		31-Dec-13
		Amortized		Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
	Available-for-sale securities:
	Commercial paper	$	124,330	$	10		$	(21	)	$	124,319
	Corporate notes and bonds	399,519		129			(360		)	399,288
	Total available-for-sale securities	$	523,849	$	139		$	(381	)	$	523,607
	As of June 30, 2014, the contractual maturities of our investments did not exceed 24 months. The fair values of available-for-sale investments, by contractual maturity, are as follows (in thousands):
		30-Jun-14
	Due in 1 year or less	$	348,205
	Due in 1 year through 3 years	279,580
	Total	$	627,785
	We had certain available-for-sale securities in a gross unrealized loss position, all of which had been in such position for less than 12 months. There were no impairments considered "other-than-temporary" as it is more likely than not we will hold the securities until maturity or a recovery of the cost basis. The following table shows the fair values and the gross unrealized losses of these available-for-sale securities aggregated by investment types (in thousands):
		30-Jun-14					31-Dec-13
		Fair Value		Gross			Fair Value			Gross
				Unrealized						Unrealized
				Losses						Losses
	Commercial paper	$	31,027	$	(6	)	$	81,467		$	(21	)
	Corporate notes, bonds and certificate of deposit	257,839		(187		)	293,642			(360		)
	Total	$	288,866	$	(193	)	$	375,109		$	(381	)

Fair_Value_Measurements

Fair Value Measurements	6 Months Ended
	Jun. 30, 2014
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]	'
Fair Value Measurements	'
	Fair Value Measurements
	The following table presents our fair value hierarchy for our assets and liabilities measured at fair value on a recurring basis at June 30, 2014 (in thousands):
		Level 1		Level 2		Level 3		Total
	Cash and cash equivalents:
	Cash	$	95,678	$	—	$	—	$	95,678
	Money market funds	103,413		—		—		103,413
	Commercial paper	—		130,184		—		130,184
	Short-term investments:
	Commercial paper	—		63,018		—		63,018
	Corporate notes, bonds and certificate of deposit	—		285,187		—		285,187
	Long-term investments:
	Corporate notes and bonds	—		269,570		—		269,570
	U.S. government agency securities	—		10,010		—		10,010
	Total	$	199,091	$	757,969	$	—	$	957,060
	The following table presents our fair value hierarchy for our assets and liabilities measured at fair value on a recurring basis at December 31, 2013 (in thousands):
		Level 1		Level 2		Level 3		Total
	Cash and cash equivalents:
	Cash	$	69,333	$	—	$	—	$	69,333
	Money market funds	35,248		—		—		35,248
	Commercial paper	—		261,722		—		261,722
	Short-term investments:
	Commercial paper	—		124,319		—		124,319
	Corporate notes and bonds	—		143,932		—		143,932
	Long-term investments:
	Corporate notes and bonds	—		255,356		—		255,356
	Total	$	104,581	$	785,329	$	—	$	889,910
	We determine the fair value of our security holdings based on pricing from our service provider and market prices from industry-standard independent data providers. Such market prices may be quoted prices in active markets for identical assets (Level 1 inputs) or pricing determined using inputs other than quoted prices that are observable either directly or indirectly (Level 2 inputs), such as yield curve, volatility factors, credit spreads, default rates, loss severity, current market and contractual prices for the underlying instruments or debt, broker and dealer quotes, as well as other relevant economic measures.

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Goodwill and Intangible Assets	'
	Goodwill and Intangible Assets
	Goodwill balances are presented below (in thousands):
		Carrying Amount
	Balance as of December 31, 2013	$	8,724
	Foreign currency translation adjustments	(102		)
	Balance as of June 30, 2014	$	8,622
	Intangible assets consist of the following (in thousands):
		June 30, 2014
		Gross Carrying Amount			Accumulated Amortization			Net Carrying Amount
	Developed technology	$	5,759		$	(1,440	)	$	4,319
	Contracts	312			(207		)	105
	Non-compete agreements	33			(22		)	11
	Acquisition-related intangible assets	6,104			(1,669		)	4,435
	Other intangible assets	1,075			(220		)	855
	Total intangible assets	$	7,179		$	(1,889	)	$	5,290
		December 31, 2013
		Gross Carrying Amount			Accumulated Amortization			Net Carrying Amount
	Developed technology	$	5,783		$	(723	)	$	5,060
	Contracts	315			(104		)	211
	Non-compete agreements	33			(11		)	22
	Acquisition-related intangible assets	6,131			(838		)	5,293
	Other intangible assets	650			(147		)	503
	Total intangible assets	$	6,781		$	(985	)	$	5,796
	Amortization expense for intangible assets for the three months ended June 30, 2014 and 2013 was approximately $468,000 and $23,000, respectively, and for the six months ended June 30, 2014 and 2013 was approximately $908,000 and $46,000, respectively.

Property_and_Equipment

Property and Equipment	6 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Property and Equipment	'
	Property and Equipment
	Property and equipment, net consists of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Computer equipment and software	$	116,926		$	90,617
	Furniture and fixtures	15,674			13,751
	Leasehold improvements	14,151			8,371
	Construction in progress	1,340			928
		148,091			113,667
	Less: Accumulated depreciation	(51,608		)	(38,107		)
	Total property and equipment, net	$	96,483		$	75,560
	Construction in progress consists primarily of in-process software development costs and leasehold improvements. Depreciation expense for the three months ended June 30, 2014 and 2013 was $8.2 million and $5.3 million, respectively, and for the six months ended June 30, 2014 and 2013 was $15.7 million and $9.7 million, respectively.

Accrued_Expenses_and_Other_Cur

Accrued Expenses and Other Current Liabilities	6 Months Ended
	Jun. 30, 2014
Disclosure Summary Of Accrued Expenses And Other Current Liabilities [Abstract]	'
Accrued Expenses and Other Current Liabilities	'
	Accrued Expenses and Other Current Liabilities
	Accrued expenses and other current liabilities consist of the following (in thousands):
		June 30,		December 31,
		2014		2013
	Taxes payable	$	3,711	$	4,187
	Bonuses and commissions	19,754		22,322
	Accrued compensation	13,629		16,610
	Other employee expenses	14,201		11,926
	Other	13,002		13,085
	Total accrued expenses and other current liabilities	$	64,297	$	68,130

Notes_Payable_Notes

Notes Payable (Notes)	6 Months Ended
	Jun. 30, 2014
Convertible Notes Payable [Abstract]	'
Notes Payable [Text Block]	'
	Convertible Senior Notes
	In November 2013, we issued 0% convertible senior notes due November 1, 2018 with aggregate principal amount of $575 million (the "Notes"). The Notes will not bear interest. The Notes mature on November 1, 2018 unless converted or repurchased in accordance with their terms prior to such date. We cannot redeem the Notes prior to maturity.
	The Notes are unsecured obligations and do not contain any financial covenants or restrictions on the payments of dividends, the incurrence of indebtedness or the issuance or repurchase of securities by us or any of our subsidiaries.
	Upon conversion, we may choose to pay or deliver, as the case may be, cash, shares of our common stock or a combination of cash and shares of our common stock. We intend to settle the principal amount of the Notes with cash.
	The Notes are convertible up to 7.8 million shares of our common stock at an initial conversion rate of approximately 13.54 shares of common stock per $1,000 principal amount, which is equal to an initial conversion price of approximately $73.88 per share of common stock, subject to adjustment. Holders of the Notes may convert their Notes at their option at any time prior to the close of business on the business day immediately preceding July 1, 2018, only under the following circumstances:
	•	during any calendar quarter commencing after the calendar quarter ending on March 31, 2014 (and only during such calendar quarter), if the last reported sale price of the common stock for at least 20 trading days (whether or not consecutive) during the 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 (the “measurement period”) in which the trading price per $1,000 principal amount of notes for each trading day of the measurement period was less than 98% of the product of the last reported sale price of our common stock and the conversion rate on each such trading day; or
	•	upon the occurrence of specified corporate events.
	On or after July 1, 2018, a holder may convert all or any portion of its notes at any time prior to the close of business on the second scheduled trading day immediately preceding the maturity date regardless of the foregoing conditions. Upon conversion, we will pay or deliver, as the case may be, cash, shares of our common stock or a combination of cash and shares of our common stock, at our election.
	The conversion price will be subject to adjustment in some events. Holders of the Notes who convert their notes in connection with certain corporate events that constitute a “make-whole fundamental change” are, under certain circumstances, entitled to an increase in the conversion rate. Additionally, in the event of a corporate event that constitutes a “fundamental change,” holders of the Notes may require us to purchase with cash all or a portion of the Notes upon the occurrence of a fundamental change, at a purchase price equal to 100% of the principal amount of the Notes plus any accrued and unpaid interest.
	In accounting for the issuance of the Notes, we separated the Notes into liability and equity components. The carrying cost of the liability component was calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component representing the conversion option was determined by deducting the fair value of the liability component from the par value of the Notes. The difference between the principal amount of the Notes and the proceeds allocated to the liability component (“debt discount”) is amortized to interest expense using the effective interest method over the term of the Note. The equity component is not remeasured as long as it continues to meet the conditions for equity classification.
	In accounting for the transaction costs related to the issuance of the Notes, we allocated the total amount incurred to the liability and equity components based on their relative fair values. Transaction costs attributable to the liability component are being amortized to interest expense over the term of the Notes, and transaction costs attributable to the equity component were netted with the equity component of the Notes in stockholders’ equity. The Notes consisted of the following (in thousands):
		30-Jun-14			31-Dec-13
	Liability:
	Principal	$	575,000		$	575,000
	Less: debt discount, net of amortization	(145,975		)	(160,223		)
	Net carrying amount	$	429,025		$	414,777
	We consider the fair value of the Notes at June 30, 2014 and December 31, 2013 to be a Level 2 measurement. The fair value of the Notes is primarily affected by the trading price of our common stock and interest rate. Based on the closing price of our common stock of $61.96 and $56.01 on June 30, 2014 and December 31, 2013, respectively, the if-converted value of the Notes was less than its principal amount.
	As of June 30, 2014, the remaining life of the Notes is 52 months. The following table sets forth total interest expense recognized related to the Notes (in thousands):
		Three months ended June 30, 2014			Six months ended June 30, 2014
	Amortization of debt issuance cost	$	386		$	766
	Amortization of debt discount	6,816			13,517
	Total	$	7,202		$	14,283
	Effective interest rate of the liability component	6.50%
	No interest expense related to the Notes were recognized for the three and six months ended June 30, 2013.
	Note Hedge
	To minimize the impact of potential economic dilution upon conversion of the Notes, we entered into convertible note hedge transactions (the "Note Hedge") with respect to our common stock concurrent with the issuance of the Notes. The Note Hedge covers approximately 7.8 million shares of our common stock at a strike price per share that corresponds to the initial conversion price of the Notes, subject to adjustment, and is exercisable upon conversion of the Notes. We paid an aggregate amount of $135.8 million for the Note Hedge. The Note Hedge will expire upon maturity of the Notes. The Note Hedge is intended to reduce the potential economic dilution upon conversion of the Notes in the event that the fair value per share of our common stock at the time of exercise is greater than the conversion price of the Notes. The Note Hedge is a separate transaction and is not part of the terms of the Notes. The Note Hedge does not impact earnings per share, as it was entered into to offset any dilution from the Notes.
	Warrants
	Separately, we entered into warrant transactions (the “Warrants”) whereby we sold warrants to acquire up to 7.8 million shares of our common stock, at a strike price of $107.46 per share, subject to adjustment. We received aggregate proceeds of $84.5 million from the sale of the Warrants. If the average market value per share of our common stock for the reporting period, as measured under the Warrants, exceeds the strike price of the Warrants, the Warrants will have a dilutive effect on our earnings per share. The Warrants are separate transactions and are not remeasured through earnings each reporting period. The Warrants are not part of the Notes or the Note Hedge, and have been accounted for as part of additional paid-in capital.

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Loss	6 Months Ended
	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]	'
Accumulated Other Comprehensive Loss	'
	Accumulated Other Comprehensive Income (Loss)
	The components of accumulated other comprehensive income (loss), net of tax, consist of the following (in thousands):
		June 30,		December 31,
		2014		2013
	Foreign currency translation adjustment	$	452	$	(234	)
	Net unrealized gain (loss) on investments	148		(242		)
	Accumulated other comprehensive income (loss), net of tax	$	600	$	(476	)
	Reclassification adjustments out of accumulated other comprehensive income (loss) into net loss were immaterial for all periods presented.

Stockholders_Equity

Stockholders' Equity	6 Months Ended
	Jun. 30, 2014
Disclosure Common Stock Outstanding And Reserved Shares Of Common Stock For Future Issuance [Abstract]	'
Common Stock	'
	Stockholders' Equity
	We were authorized to issue 600,000,000 shares of common stock as of June 30, 2014. Holders of our common stock are not entitled to receive dividends unless declared by our board of directors. As of June 30, 2014, we had 145,174,006 shares of common stock outstanding and had reserved shares of common stock for future issuance as follows:
		30-Jun-14
	Stock option plans:
	Options outstanding	19,375,640
	RSUs	8,353,408
	Stock awards available for future grants:
	2005 Stock Option Plan(1)	—
	2012 Equity Incentive Plan(1)	16,691,038
	2012 Employee Stock Purchase Plan(1)	6,727,906
	Total reserved shares of common stock for future issuance	51,147,992
	-1	Refer to Note 11 for a description of these plans.
	During the six months ended June 30, 2014 and 2013, we issued a total of 4,825,594 shares and 9,817,230 shares, respectively, from stock option exercises, vesting of restricted stock units, or RSUs, and purchases from the employee stock purchase plan, or ESPP.

Stock_Awards

Stock Awards	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Stock Awards	'
	Stock Awards
	We have a 2005 Stock Option Plan, or 2005 Plan, which provides for grants of stock awards, including options to purchase shares of common stock, stock purchase rights and RSUs to certain employees, officers, directors and consultants.
	Our 2012 Equity Incentive Plan, or 2012 Plan, provides for the grant of incentive stock options, nonqualified stock options, stock appreciation rights, RSUs, performance-based stock awards and other forms of equity compensation, or collectively, stock awards. In addition, the 2012 Plan provides for the grant of performance cash awards. Incentive stock options may be granted only to employees. All other awards may be granted to employees, including officers, as well as directors and consultants. The share reserve may increase to the extent outstanding stock options under the 2005 Plan expire or terminate unexercised. The share reserve also automatically increases on January 1 of each year until January 1, 2022, by up to 5% of the total number of shares of common stock outstanding on December 31 of the preceding year as determined by the board of directors. On January 1, 2014, 7,017,730 shares of common stock were automatically added to the 2012 Plan pursuant to the provision described in the preceding sentence.
	Our 2012 Employee Stock Purchase Plan, or 2012 ESPP, authorizes the issuance of shares of common stock pursuant to purchase rights granted to our employees. The number of shares of common stock reserved for issuance automatically increases on January 1 of each year until January 1, 2022, by up to 1% of the total number of shares of common stock outstanding on December 31 of the preceding year as determined by the board of directors. The price at which common stock is purchased under the 2012 ESPP is equal to 85% of the fair market value of the common stock on the first or last day of the offering period, whichever is lower. Offering periods are six months long and begin on February 1 and August 1 of each year. On January 1, 2014, 1,403,546 shares of common stock were automatically added to the 2012 ESPP pursuant to the provision described in the preceding sentence.
	Stock Options
	A summary of the stock option activity for the six months ended June 30, 2014 is as follows:
		Number of		Weighted-		Weighted-		Aggregate
		Shares		Average		Average		Intrinsic Value
				Exercise		Remaining		(in thousands)
				Price		Contractual
						Term (Years)
	Outstanding at December 31, 2013	23,399,374		$	9.07
	Granted	232,048		64.82
	Exercised	(3,792,101	)	5.35				$	209,315
	Canceled	(463,681	)	24.47
	Outstanding at June 30, 2014	19,375,640		$	10.05	7.27		$	1,006,664
	Vested and expected to vest as of June 30, 2014	19,089,638		$	9.85	7.26		$	994,766
	Vested and exercisable as of June 30, 2014	9,616,984		$	6.35	6.89		$	534,804
	Aggregate intrinsic value represents the difference between the estimated fair value of our common stock and the exercise price of outstanding, in-the-money options. The weighted-average grant date fair value per share of options granted was $31.48 for the six months ended June 30, 2014. The total fair value of shares vested was $21.3 million for the six months ended June 30, 2014.
	As of June 30, 2014, total unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock options was approximately $59.1 million. The weighted-average remaining vesting period of unvested stock options at June 30, 2014 was 2.38 years.
	RSUs
	Activity with respect to outstanding RSUs for the six months ended June 30, 2014 was as follows:
		Number of		Weighted Average Grant Date Fair Value		Aggregate
		Shares		(Per Share)		Fair Value
						(in thousands)
	Outstanding at December 31, 2013	5,427,509		$	34.02
	Granted	4,083,379		62.11
	Vested	(807,935	)	25.16		$	45,691
	Forfeited	(349,545	)	40.76
	Non-vested and outstanding at June 30, 2014	8,353,408		$	48.32	$	517,577
	Expected to vest as of June 30, 2014	7,806,579				$	483,696
	RSUs granted under the 2005 Plan and the 2012 Plan to employees generally vest annually over a four-year period. As of June 30, 2014, total unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested RSUs was approximately $332.4 million and the weighted-average remaining vesting period was 3.36 years.
	In the six months ended June 30, 2014, we issued restricted stock units with both service and performance-based vesting criteria to certain executives. These restricted stock units will be eligible to vest based on our attainment of the 2014 financial performance goal as well as each executive's continued employment through the vesting date. In order to earn the restricted stock units, the low end of the predetermined goal must be met. The number of restricted stock units to be earned will range from 0% to 200% of the target awards based on the actual level of achievement of the financial performance goal. Shares earned will vest in four quarterly increments from February 2016 contingent on the continuous employment of each executive. We recognize stock-based compensation expense associated with these awards on a graded vesting basis over the vesting period, after assessing the probability of achieving the 2014 financial performance goal. As of June 30, 2014, we estimated 122.9% of target awards will be earned. As actual results are achieved, the probability assessment is updated and stock-based compensation expense is adjusted accordingly.

Net_Income_Loss_Per_Share_Attr

Net Income (Loss) Per Share Attributable to Common Stockholders	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Net Income (Loss) Per Share Attributable to Common Stockholders	'
	Net Loss Per Share
	The following tables present the calculation of basic and diluted net loss per share (in thousands, except share and per share data):
		Three Months Ended June 30,							Six Months Ended June 30,
		2014				2013			2014			2013
	Numerator:
	Net loss	$	(50,363	)		$	(21,405	)	$	(93,674	)	$	(34,763	)
	Denominator:
	Weighted-average shares outstanding—basic and diluted	144,456,675				134,454,085			143,267,181			132,298,095
	Net loss per share:
	Basic	$	(0.35	)		$	(0.16	)	$	(0.65	)	$	(0.26	)
	Diluted	$	(0.35	)		$	(0.16	)	$	(0.65	)	$	(0.26	)
	Potentially dilutive securities that are not included in the calculation of diluted net loss per share because doing so would be antidilutive are as follows:
		June 30,
		2014			2013
	Common stock options	19,375,640			27,534,924
	Restricted stock units	8,353,408			3,861,621
	Common stock subject to repurchase	45,879			150,522
	ESPP obligations	187,649			268,910
	Convertible senior notes	7,783,023			—
	Warrants related to the issuance of convertible senior notes	7,783,023			—
	Total potentially dilutive securities	43,528,622			31,815,977

Income_Taxes

Income Taxes	6 Months Ended
	Jun. 30, 2014
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	Income Taxes
	We compute our provision for income taxes by applying the estimated annual effective tax rate to year-to-date loss from recurring operations and adjust the provision for discrete tax items recorded in the period.
	Our effective tax rate for the three and six months ended June 30, 2014 was (1)% and (2)%, respectively, which was lower than the U.S. federal statutory tax rate of 34%. The lower tax rate was primarily attributable to our loss from U.S. operations, a foreign tax rate differential, and non-deductible expenses arising from stock-based compensation.
	Our effective tax rate for the three and six months ended June 30, 2013 was (4)%, which was lower than the federal statutory tax rate of 34%. The lower tax rate was primarily attributable to our loss from operations, a foreign tax rate differential, and non-deductible expenses arising from stock-based compensation, partially offset by state income taxes.
	We are subject to taxation in the United States and foreign jurisdictions.  As of June 30, 2014, our tax years 2005 to 2013 remain subject to examination in most jurisdictions. We are currently under examination by the Internal Revenue Service for the year ended June 30, 2011 and six months ended December 31, 2011.
	There are differing interpretations of tax laws and regulations, and as a result, disputes may arise with tax authorities involving issues of the timing and amount of deductions and allocations of income among various tax jurisdictions. We periodically evaluate our exposures associated with our tax filing positions. We believe that adequate amounts have been reserved for any adjustments that may ultimately result from these examinations, and we do not anticipate a significant impact to our gross unrecognized tax benefits within the next 12 months related to these years. Although the timing of the resolution, settlement, and closure of any audit is highly uncertain, it is reasonably possible that the balance of gross unrecognized tax benefits could significantly change in the next 12 months. However, given the number of years that remain subject to examination, we are unable to estimate the full range of possible adjustments to the balance of gross unrecognized tax benefits.

Commitments_and_Contingencies

Commitments and Contingencies	6 Months Ended
	Jun. 30, 2014
Commitments and Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	Commitments and Contingencies
	Leases
	We lease facilities for data center capacity and office space under non-cancelable operating lease agreements with various expiration dates. There have been no material changes in our commitments under contractual obligations, as disclosed in our Annual Report on Form 10-K for the year ended December 31, 2013.
	Legal Proceedings
	From time to time, we are party to litigation and other legal proceedings in the ordinary course of business. While the results of any litigation or other legal proceedings are uncertain, management does not believe the ultimate resolution of any pending legal matters is likely to have a material adverse effect on our financial position, results of operations or cash flows, except as discussed below and for those matters for which we have recorded a loss contingency. We accrue for loss contingencies when it is both probable that we will incur the loss and when we can reasonably estimate the amount of the loss.
	Generally, our subscription agreements require us to indemnify our customers for third-party intellectual property infringement and other claims. Any adverse determination related to intellectual property claims or other litigation could prevent us from offering our services and adversely affect our financial condition and results of operations.
	On February 6, 2014, Hewlett-Packard Company filed a lawsuit against us in the U.S. District Court for the Northern District of California that alleges that some of our services infringe the claims of eight of Hewlett-Packard's patents. Hewlett-Packard is seeking unspecified damages and an injunction. We intend to vigorously defend this lawsuit. We cannot make a reasonable estimate of the potential loss or range of loss, if any, arising from this matter.

Information_about_Geographic_A

Information about Geographic Areas	6 Months Ended
	Jun. 30, 2014
Segments, Geographical Areas [Abstract]	'
Information about Geographic Areas	'
	Information about Geographic Areas
	Revenues by geographic area, based on the billing location of the customer, were as follows for the periods presented (in thousands):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	Revenues by geography:
	North America (1)	$	114,261	$	71,855	$	209,225	$	132,001
	EMEA (2)	42,194		24,478		78,500		45,741
	Asia Pacific and other	10,302		5,889		18,122		10,419
	Total revenues	$	166,757	$	102,222	$	305,847	$	188,161
	Long-lived assets by geographic area were as follows (in thousands):
		June 30,		December 31,
		2014		2013
	Long-lived assets:
	North America	$	61,774	$	52,937
	EMEA(2)	22,373		18,017
	Asia Pacific and other	12,336		4,606
	Total long-lived assets	$	96,483	$	75,560
	(1) Revenues attributed to the United States were approximately 94% of North America revenues for the three months ended June 30, 2014 and 2013 and the six months ended June 30, 2014 and 2013.
	(2) Europe, the Middle East and Africa

Subsequent_Event

Subsequent Event	6 Months Ended
	Jun. 30, 2014
Subsequent Event [Abstract]	'
Subsequent Events [Text Block]	'
	Subsequent Event
	On July 11, 2014, we completed the acquisition of a privately-held company, Neebula Systems Ltd. ("Neebula"), by acquiring all issued and outstanding common shares of Neebula for approximately $100 million in an all-cash transaction. Neebula’s flagship product, ServiceWatch, automates the discovery, mapping, and monitoring of IT-enabled enterprise services. The acquisition will expand the overall capabilities of our IT offerings. The following table summarizes the preliminary allocation of the purchase price to the fair value of the tangible and intangible assets acquired and liabilities assumed as of the acquisition date (in thousands):
		Purchase Price Allocation			Useful Life
		(in thousands)			(in years)
	Net tangible asset acquired	$	118
	Intangible assets:
	Developed technology	56,200			5.5
	Order backlog	600			1.5
	Trade names	300			1.5
	Goodwill	54,564
	Net deferred tax liabilities	(11,319		)
	Total purchase price	$	100,463
	The excess of purchase consideration over the fair value of net tangible and identifiable intangible assets acquired was recorded as goodwill. Management believes the goodwill represents the synergies expected from expanded market opportunities when integrating Neebula technologies with our offerings. The preliminary estimated fair values of assets acquired and liabilities assumed, including current and noncurrent income taxes payable and deferred taxes, and identifiable intangible assets may be subject to change as additional information is received. Thus the provisional measurements of fair value set forth above are subject to change. We expect to finalize the valuation as soon as practicable.
	The results of operations of Neebula will be included in our consolidated financial statements from the date of purchase.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2014
Accounting Policies [Abstract]	'
Basis of Accounting, Policy [Policy Text Block]	'
	Basis of Presentation
	The accompanying unaudited condensed consolidated financial statements and condensed footnotes have been prepared in accordance with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring items) considered necessary for fair financial statement presentation have been included. The results of operations for the three and six months ended June 30, 2014 are not necessarily indicative of the results to be expected for the year ended December 31, 2014 or for other interim periods or for future years. The condensed consolidated balance sheet as of December 31, 2013 is derived from audited financial statements as of that date, however, does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements. These condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in the Company’s Form 10-K for the year ended December 31, 2013, which was filed with the Securities and Exchange Commission on February 28, 2014.
Principles of Consolidation	'
	Principles of Consolidation
	The condensed consolidated financial statements have been prepared in conformity with U.S. generally accepted accounting principles, or GAAP, and include our accounts and the accounts of our wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated upon consolidation.
Use of Estimates	'
	Use of Estimates
	The preparation of consolidated financial statements in conformity with GAAP requires management to make certain estimates and assumptions. These estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements, as well as reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Concentration of Credit Risk and Significant Customers	'
	Concentration of Credit Risk and Significant Customers
	Financial instruments potentially exposing us to credit risk consist primarily of cash equivalents, investments and accounts receivable. We maintain cash, cash equivalents and investments at financial institutions that management believes to have good credit ratings and represent minimal risk of loss of principal. We invest in securities issued by financial-sector firms with a minimum rating of A by Standard & Poor's and A2 by Moody's and securities issued by non-financial sector firms with a minimum rating of BBB by Standard & Poor's and Baa1 by Moody's.
	Credit risk arising from accounts receivable is mitigated due to our large number of customers and their dispersion across various industries and geographies. As of June 30, 2014 and December 31, 2013, there were no customers that represented more than 10% of our accounts receivable balance. During the three and six months ended June 30, 2014 and 2013, there were no customers that individually exceeded 10% of our revenues.
	We review the composition of the accounts receivable balance, historical write-off experience and the potential risk of loss associated with delinquent accounts to determine if an allowance for doubtful accounts is necessary. Individual accounts receivable are written off when we become aware of a specific customer’s inability to meet its financial obligation and all collection efforts are exhausted. As of June 30, 2014 and December 31, 2013, the allowance for doubtful accounts was $1.7 million and $1.1 million, res
Warranties and Indemnification	'
	Warranties and Indemnification
	Our cloud-based service to automate enterprise IT operations is typically warranted to perform in material conformance with specifications.
	We include service level commitments to our customers that permit those customers to receive credits in the event we fail to meet those levels. We establish an accrual based on historical credits paid and an evaluation of the performance of our services, including an assessment of the impact of any known service disruptions. Service level credit accrual charges are recorded against revenue. As of June 30, 2014 and December 31, 2013, the service level credit accrual was $1.0 million and $0.6 million, respectively.
	We have also agreed to indemnify our directors and executive officers for costs associated with any fees, expenses, judgments, fines and settlement amounts incurred by any of these persons in any action or proceeding to which any of those persons is, or is threatened to be, made a party by reason of the person’s service as a director or officer, including any action by us, arising out of that person’s services as a director or officer of our company or that person’s services provided to any other company or enterprise at our request. We maintain director and officer insurance coverage that may enable us to recover a portion of any future amounts paid.
	Our arrangements include provisions indemnifying customers against intellectual property and other third-party claims. We have not incurred any costs as a result of such indemnifications and have not recorded any liabilities related to such obligations in the condensed consolidated financial statements.
New Accounting Pronouncements, Policy [Policy Text Block]	'
	Recent Accounting Pronouncement
	In May 2014, the Financial Accounting Standards Board ("FASB") issued an update to ASC 606 Revenue from Contracts with Customers (“ASC 606”) that will supersede virtually all existing revenue guidance. Under this update, an entity is required to recognize revenue upon transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. As such, an entity will need to use more judgment and make more estimates than under the current guidance. This update should be applied retrospectively either to each prior reporting period presented in the financial statements, or only to the most current reporting period presented in the financial statements with a cumulative effect adjustment recorded in the retained earnings. This guidance will become effective for us for our interim and annual reporting periods beginning January 1, 2017. We are currently evaluating the impact of this update on our consolidated financial statements.

Investments_Tables

Investments (Tables)	6 Months Ended
	Jun. 30, 2014
Available-for-sale Securities [Abstract]	'
Summary of Investments	'
	The following is a summary of our investments (in thousands):
		30-Jun-14
		Amortized		Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
	Available-for-sale securities:
	Commercial paper	$	63,018	$	6		$	(6	)	$	63,018
	Corporate notes, bonds and certificate of deposit	554,612		333			(187		)	554,758
	U.S. government agency securities	10,007		2			—			10,009
	Total available-for-sale securities	$	627,637	$	341		$	(193	)	$	627,785
		31-Dec-13
		Amortized		Gross			Gross			Estimated
		Cost		Unrealized			Unrealized			Fair Value
				Gains			Losses
	Available-for-sale securities:
	Commercial paper	$	124,330	$	10		$	(21	)	$	124,319
	Corporate notes and bonds	399,519		129			(360		)	399,288
	Total available-for-sale securities	$	523,849	$	139		$	(381	)	$	523,607
Investments Classified by Contractual Maturity Date	'
	The fair values of available-for-sale investments, by contractual maturity, are as follows (in thousands):
		30-Jun-14
	Due in 1 year or less	$	348,205
	Due in 1 year through 3 years	279,580
	Total	$	627,785
Fair Values and Gross Unrealized Losses of Available-for-Sale Securities Aggregated by Investment Category	'
	The following table shows the fair values and the gross unrealized losses of these available-for-sale securities aggregated by investment types (in thousands):
		30-Jun-14					31-Dec-13
		Fair Value		Gross			Fair Value			Gross
				Unrealized						Unrealized
				Losses						Losses
	Commercial paper	$	31,027	$	(6	)	$	81,467		$	(21	)
	Corporate notes, bonds and certificate of deposit	257,839		(187		)	293,642			(360		)
	Total	$	288,866	$	(193	)	$	375,109		$	(381	)

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	6 Months Ended
	Jun. 30, 2014
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]	'
Assets and Liabilities Measured at Fair Value on Recurring Basis	'
	The following table presents our fair value hierarchy for our assets and liabilities measured at fair value on a recurring basis at June 30, 2014 (in thousands):
		Level 1		Level 2		Level 3		Total
	Cash and cash equivalents:
	Cash	$	95,678	$	—	$	—	$	95,678
	Money market funds	103,413		—		—		103,413
	Commercial paper	—		130,184		—		130,184
	Short-term investments:
	Commercial paper	—		63,018		—		63,018
	Corporate notes, bonds and certificate of deposit	—		285,187		—		285,187
	Long-term investments:
	Corporate notes and bonds	—		269,570		—		269,570
	U.S. government agency securities	—		10,010		—		10,010
	Total	$	199,091	$	757,969	$	—	$	957,060
	The following table presents our fair value hierarchy for our assets and liabilities measured at fair value on a recurring basis at December 31, 2013 (in thousands):
		Level 1		Level 2		Level 3		Total
	Cash and cash equivalents:
	Cash	$	69,333	$	—	$	—	$	69,333
	Money market funds	35,248		—		—		35,248
	Commercial paper	—		261,722		—		261,722
	Short-term investments:
	Commercial paper	—		124,319		—		124,319
	Corporate notes and bonds	—		143,932		—		143,932
	Long-term investments:
	Corporate notes and bonds	—		255,356		—		255,356
	Total	$	104,581	$	785,329	$	—	$	889,910

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2014
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of Goodwill	'
	Goodwill balances are presented below (in thousands):
		Carrying Amount
	Balance as of December 31, 2013	$	8,724
	Foreign currency translation adjustments	(102		)
	Balance as of June 30, 2014	$	8,622
Schedule of Intangible Assets	'
	Intangible assets consist of the following (in thousands):
		June 30, 2014
		Gross Carrying Amount			Accumulated Amortization			Net Carrying Amount
	Developed technology	$	5,759		$	(1,440	)	$	4,319
	Contracts	312			(207		)	105
	Non-compete agreements	33			(22		)	11
	Acquisition-related intangible assets	6,104			(1,669		)	4,435
	Other intangible assets	1,075			(220		)	855
	Total intangible assets	$	7,179		$	(1,889	)	$	5,290
		December 31, 2013
		Gross Carrying Amount			Accumulated Amortization			Net Carrying Amount
	Developed technology	$	5,783		$	(723	)	$	5,060
	Contracts	315			(104		)	211
	Non-compete agreements	33			(11		)	22
	Acquisition-related intangible assets	6,131			(838		)	5,293
	Other intangible assets	650			(147		)	503
	Total intangible assets	$	6,781		$	(985	)	$	5,796

Property_and_Equipment_Tables

Property and Equipment (Tables)	6 Months Ended
	Jun. 30, 2014
Property, Plant and Equipment [Abstract]	'
Summary of Property and Equipment, Net	'
	Property and equipment, net consists of the following (in thousands):
		June 30,			December 31,
		2014			2013
	Computer equipment and software	$	116,926		$	90,617
	Furniture and fixtures	15,674			13,751
	Leasehold improvements	14,151			8,371
	Construction in progress	1,340			928
		148,091			113,667
	Less: Accumulated depreciation	(51,608		)	(38,107		)
	Total property and equipment, net	$	96,483		$	75,560

Accrued_Expenses_and_Other_Cur1

Accrued Expenses and Other Current Liabilities (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Summary Of Accrued Expenses And Other Current Liabilities [Abstract]	'
Summary of Accrued Expenses and Other Current Liabilities	'
	Accrued expenses and other current liabilities consist of the following (in thousands):
		June 30,		December 31,
		2014		2013
	Taxes payable	$	3,711	$	4,187
	Bonuses and commissions	19,754		22,322
	Accrued compensation	13,629		16,610
	Other employee expenses	14,201		11,926
	Other	13,002		13,085
	Total accrued expenses and other current liabilities	$	64,297	$	68,130

Notes_Payable_Tables

Notes Payable (Tables)	6 Months Ended
	Jun. 30, 2014
Convertible Notes Payable [Abstract]	'
Schedule of Convertible Notes	'
	The Notes consisted of the following (in thousands):
		30-Jun-14			31-Dec-13
	Liability:
	Principal	$	575,000		$	575,000
	Less: debt discount, net of amortization	(145,975		)	(160,223		)
	Net carrying amount	$	429,025		$	414,777
Interest Expense Recognized Related to the Notes	'
	The following table sets forth total interest expense recognized related to the Notes (in thousands):
		Three months ended June 30, 2014			Six months ended June 30, 2014
	Amortization of debt issuance cost	$	386		$	766
	Amortization of debt discount	6,816			13,517
	Total	$	7,202		$	14,283
	Effective interest rate of the liability component	6.50%

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Loss (Tables)	6 Months Ended
	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]	'
Schedule of Accumulated Other Comprehensive Income (Loss)	'
	The components of accumulated other comprehensive income (loss), net of tax, consist of the following (in thousands):
		June 30,		December 31,
		2014		2013
	Foreign currency translation adjustment	$	452	$	(234	)
	Net unrealized gain (loss) on investments	148		(242		)
	Accumulated other comprehensive income (loss), net of tax	$	600	$	(476	)

Stockholders_Equity_Tables

Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure Common Stock Outstanding And Reserved Shares Of Common Stock For Future Issuance [Abstract]	'
Common Stock Outstanding and Reserved Shares of Common Stock for Future Issuance	'
	As of June 30, 2014, we had 145,174,006 shares of common stock outstanding and had reserved shares of common stock for future issuance as follows:
		30-Jun-14
	Stock option plans:
	Options outstanding	19,375,640
	RSUs	8,353,408
	Stock awards available for future grants:
	2005 Stock Option Plan(1)	—
	2012 Equity Incentive Plan(1)	16,691,038
	2012 Employee Stock Purchase Plan(1)	6,727,906
	Total reserved shares of common stock for future issuance	51,147,992
	-1	Refer to Note 11 for a description of these plans.

Stock_Awards_Tables

Stock Awards (Tables)	6 Months Ended
	Jun. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]	'
Schedule of Stock Option Activity	'
	A summary of the stock option activity for the six months ended June 30, 2014 is as follows:
		Number of		Weighted-		Weighted-		Aggregate
		Shares		Average		Average		Intrinsic Value
				Exercise		Remaining		(in thousands)
				Price		Contractual
						Term (Years)
	Outstanding at December 31, 2013	23,399,374		$	9.07
	Granted	232,048		64.82
	Exercised	(3,792,101	)	5.35				$	209,315
	Canceled	(463,681	)	24.47
	Outstanding at June 30, 2014	19,375,640		$	10.05	7.27		$	1,006,664
	Vested and expected to vest as of June 30, 2014	19,089,638		$	9.85	7.26		$	994,766
	Vested and exercisable as of June 30, 2014	9,616,984		$	6.35	6.89		$	534,804
Schedule of Restricted Stock Unit Activity	'
	Activity with respect to outstanding RSUs for the six months ended June 30, 2014 was as follows:
		Number of		Weighted Average Grant Date Fair Value		Aggregate
		Shares		(Per Share)		Fair Value
						(in thousands)
	Outstanding at December 31, 2013	5,427,509		$	34.02
	Granted	4,083,379		62.11
	Vested	(807,935	)	25.16		$	45,691
	Forfeited	(349,545	)	40.76
	Non-vested and outstanding at June 30, 2014	8,353,408		$	48.32	$	517,577
	Expected to vest as of June 30, 2014	7,806,579				$	483,696

Net_Income_Loss_Per_Share_Attr1

Net Income (Loss) Per Share Attributable to Common Stockholders (Tables)	6 Months Ended
	Jun. 30, 2014
Earnings Per Share [Abstract]	'
Calculation of Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders	'
	The following tables present the calculation of basic and diluted net loss per share (in thousands, except share and per share data):
		Three Months Ended June 30,							Six Months Ended June 30,
		2014				2013			2014			2013
	Numerator:
	Net loss	$	(50,363	)		$	(21,405	)	$	(93,674	)	$	(34,763	)
	Denominator:
	Weighted-average shares outstanding—basic and diluted	144,456,675				134,454,085			143,267,181			132,298,095
	Net loss per share:
	Basic	$	(0.35	)		$	(0.16	)	$	(0.65	)	$	(0.26	)
	Diluted	$	(0.35	)		$	(0.16	)	$	(0.65	)	$	(0.26	)
Summary of Potentially Dilutive Securities	'
	Potentially dilutive securities that are not included in the calculation of diluted net loss per share because doing so would be antidilutive are as follows:
		June 30,
		2014			2013
	Common stock options	19,375,640			27,534,924
	Restricted stock units	8,353,408			3,861,621
	Common stock subject to repurchase	45,879			150,522
	ESPP obligations	187,649			268,910
	Convertible senior notes	7,783,023			—
	Warrants related to the issuance of convertible senior notes	7,783,023			—
	Total potentially dilutive securities	43,528,622			31,815,977

Information_about_Geographic_A1

Information about Geographic Areas (Tables)	6 Months Ended
	Jun. 30, 2014
Segments, Geographical Areas [Abstract]	'
Revenues by Geographic Area, Based on Billing Location of Customer	'
	Revenues by geographic area, based on the billing location of the customer, were as follows for the periods presented (in thousands):
		Three Months Ended June 30,				Six Months Ended June 30,
		2014		2013		2014		2013
	Revenues by geography:
	North America (1)	$	114,261	$	71,855	$	209,225	$	132,001
	EMEA (2)	42,194		24,478		78,500		45,741
	Asia Pacific and other	10,302		5,889		18,122		10,419
	Total revenues	$	166,757	$	102,222	$	305,847	$	188,161
Schedule of Long Lived Assets by Geographic Area	'
	Long-lived assets by geographic area were as follows (in thousands):
		June 30,		December 31,
		2014		2013
	Long-lived assets:
	North America	$	61,774	$	52,937
	EMEA(2)	22,373		18,017
	Asia Pacific and other	12,336		4,606
	Total long-lived assets	$	96,483	$	75,560
	(1) Revenues attributed to the United States were approximately 94% of North America revenues for the three months ended June 30, 2014 and 2013 and the six months ended June 30, 2014 and 2013.
	(2) Europe, the Middle East and Africa

Subsequent_Event_Tables

Subsequent Event (Tables)	6 Months Ended
	Jun. 30, 2014
Subsequent Event [Abstract]	'
Schedule of Business Acquisitions, by Acquisition [Table Text Block]	'
	The following table summarizes the preliminary allocation of the purchase price to the fair value of the tangible and intangible assets acquired and liabilities assumed as of the acquisition date (in thousands):
		Purchase Price Allocation			Useful Life
		(in thousands)			(in years)
	Net tangible asset acquired	$	118
	Intangible assets:
	Developed technology	56,200			5.5
	Order backlog	600			1.5
	Trade names	300			1.5
	Goodwill	54,564
	Net deferred tax liabilities	(11,319		)
	Total purchase price	$	100,463

Summary_of_Significant_Account2

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details) (USD $)	6 Months Ended		3 Months Ended		6 Months Ended
In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
	Customer	Customer	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]	Customer Concentration Risk [Member]
			Customer	Customer	Customer	Customer
Concentration Risk [Line Items]	'	'	'	'	'	'
Number Of Significant Revenue Customers	'	'	0	0	0	0
Number of customers represented more than ten percent of the accounts receivable balance	0	0	'	'	'	'
Percentage of accounts receivable customers exceed	10.00%	'	'	'	'	'
Percentage of revenues customers exceed	10.00%	'	'	'	'	'
Allowance for doubtful accounts	$1.70	$1.10	'	'	'	'
Valuation Allowances and Reserves, Balance	$1	$0.60	'	'	'	'

Investments_Summary_of_Investm

Investments - Summary of Investments (Detail) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	$627,637	$523,849
Available-for-sale Securities, Gross Unrealized Gain	341	139
Available-for-sale Securities, Gross Unrealized Loss	193	381
Available-for-sale Securities	627,785	523,607
Available For Sale Securities Maturities Term Maximum	'24 months	'
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value	348,205	'
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value	279,580	'
Commercial Paper [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	63,018	124,330
Available-for-sale Securities, Gross Unrealized Gain	6	10
Available-for-sale Securities, Gross Unrealized Loss	6	21
Available-for-sale Securities	63,018	124,319
Corporate notes and bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	554,612	399,519
Available-for-sale Securities, Gross Unrealized Gain	333	129
Available-for-sale Securities, Gross Unrealized Loss	187	360
Available-for-sale Securities	554,758	399,288
U.S. government agency securities [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Amortized Cost	10,007	'
Available-for-sale Securities, Gross Unrealized Gain	2	'
Available-for-sale Securities, Gross Unrealized Loss	0	'
Available-for-sale Securities	$10,009	'

Investments_Additional_Informa

Investments - Additional Information (Detail) (USD $)	6 Months Ended
	Jun. 30, 2014
Available-for-sale Securities [Abstract]	'
Available for sale, gross unrealized term held	'12 months
Other-than-temporary impairments considered	$0

Investments_Fair_Values_and_Gr

Investments - Fair Values and Gross Unrealized Losses of Available-for-Sale Securities Aggregated by Investment Category (Detail) (USD $)	6 Months Ended	12 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]	'	'
Fair Value	$288,866	$375,109
Gross Unrealized Losses	-193	-381
Commercial Paper [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Fair Value	31,027	81,467
Gross Unrealized Losses	-6	-21
Corporate notes and bonds [Member]	'	'
Schedule of Available-for-sale Securities [Line Items]	'	'
Fair Value	257,839	293,642
Gross Unrealized Losses	($187)	($360)

Fair_Value_Measurements_Assets

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	$627,785	$523,607
Commercial Paper [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	63,018	124,319
Corporate notes and bonds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	554,758	399,288
U.S. government agency securities [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	10,009	'
Level 1 [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Total	199,091	104,581
Level 2 [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Total	757,969	785,329
Level 3 [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Total	0	0
Total [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Total	957,060	889,910
Cash [Member] | Level 1 [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	95,678	69,333
Cash [Member] | Level 2 [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	0	0
Cash [Member] | Level 3 [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	0	0
Cash [Member] | Total [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	95,678	69,333
Cash Equivalents [Member] | Level 1 [Member] | Money Market Funds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	103,413	35,248
Cash Equivalents [Member] | Level 1 [Member] | Commercial Paper [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	0	0
Cash Equivalents [Member] | Level 2 [Member] | Money Market Funds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	0	0
Cash Equivalents [Member] | Level 2 [Member] | Commercial Paper [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	130,184	261,722
Cash Equivalents [Member] | Level 3 [Member] | Money Market Funds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	0	0
Cash Equivalents [Member] | Level 3 [Member] | Commercial Paper [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	0	0
Cash Equivalents [Member] | Total [Member] | Money Market Funds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	103,413	35,248
Cash Equivalents [Member] | Total [Member] | Commercial Paper [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Cash and cash equivalents	130,184	261,722
Short-term Investments [Member] | Level 1 [Member] | Commercial Paper [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	0	0
Short-term Investments [Member] | Level 1 [Member] | Corporate notes and bonds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	0	0
Short-term Investments [Member] | Level 1 [Member] | U.S. government agency securities [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	'	0
Short-term Investments [Member] | Level 2 [Member] | Commercial Paper [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	63,018	124,319
Short-term Investments [Member] | Level 2 [Member] | Corporate notes and bonds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	285,187	143,932
Short-term Investments [Member] | Level 2 [Member] | U.S. government agency securities [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	'	255,356
Short-term Investments [Member] | Level 3 [Member] | Commercial Paper [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	0	0
Short-term Investments [Member] | Level 3 [Member] | Corporate notes and bonds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	0	0
Short-term Investments [Member] | Level 3 [Member] | U.S. government agency securities [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	'	0
Short-term Investments [Member] | Total [Member] | Commercial Paper [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	63,018	124,319
Short-term Investments [Member] | Total [Member] | Corporate notes and bonds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	285,187	143,932
Short-term Investments [Member] | Total [Member] | U.S. government agency securities [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	'	255,356
Other Long-term Investments [Member] | Level 1 [Member] | Corporate notes and bonds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	0	'
Other Long-term Investments [Member] | Level 1 [Member] | U.S. government agency securities [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	0	'
Other Long-term Investments [Member] | Level 2 [Member] | Corporate notes and bonds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	269,570	'
Other Long-term Investments [Member] | Level 2 [Member] | U.S. government agency securities [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	10,010	'
Other Long-term Investments [Member] | Level 3 [Member] | Corporate notes and bonds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	0	'
Other Long-term Investments [Member] | Level 3 [Member] | U.S. government agency securities [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	0	'
Other Long-term Investments [Member] | Total [Member] | Corporate notes and bonds [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	269,570	'
Other Long-term Investments [Member] | Total [Member] | U.S. government agency securities [Member]	'	'
Fair Value, Option, Qualitative Disclosures Related to Election [Line Items]	'	'
Investments	$10,010	'

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets - Schedule of Goodwill (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014
Goodwill [Roll Forward]	'
Goodwill, beginning of period	$8,724
Foreign currency translation adjustments	-102
Goodwill, end of period	$8,622

Goodwill_and_Intangible_Assets3

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Document Period End Date	'	'	30-Jun-14	'	'
Gross Carrying Amount	$7,179,000	'	$7,179,000	'	$6,781,000
Accumulated Amortization	-1,889,000	'	-1,889,000	'	-985,000
Net Carrying Amount	5,290,000	'	5,290,000	'	5,796,000
Amortization expense	468,000	23,000	908,000	46,000	'
Developed Technology Rights [Member]	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Carrying Amount	5,759,000	'	5,759,000	'	5,783,000
Accumulated Amortization	-1,440,000	'	-1,440,000	'	-723,000
Net Carrying Amount	4,319,000	'	4,319,000	'	5,060,000
Contract-Based Intangible Assets [Member]	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Carrying Amount	312,000	'	312,000	'	315,000
Accumulated Amortization	-207,000	'	-207,000	'	-104,000
Net Carrying Amount	105,000	'	105,000	'	211,000
Noncompete Agreements [Member]	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Carrying Amount	33,000	'	33,000	'	33,000
Accumulated Amortization	-22,000	'	-22,000	'	-11,000
Net Carrying Amount	11,000	'	11,000	'	22,000
Acquisition related intangible asset [Domain]	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Carrying Amount	6,104,000	'	6,104,000	'	6,131,000
Accumulated Amortization	-1,669,000	'	-1,669,000	'	-838,000
Net Carrying Amount	4,435,000	'	4,435,000	'	5,293,000
Other Intangible Assets [Member]	'	'	'	'	'
Acquired Finite-Lived Intangible Assets [Line Items]	'	'	'	'	'
Gross Carrying Amount	1,075,000	'	1,075,000	'	650,000
Accumulated Amortization	-220,000	'	-220,000	'	-147,000
Net Carrying Amount	$855,000	'	$855,000	'	$503,000

Property_and_Equipment_Net_Det

Property and Equipment - Net (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Gross	$148,091	$113,667
Less: accumulated depreciation	-51,608	-38,107
Total property and equipment, net	96,483	75,560
Computer Equipment And Software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Gross	116,926	90,617
Furniture and Fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Gross	15,674	13,751
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Gross	14,151	8,371
Construction in Progress [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment, Gross	$1,340	$928

Property_and_Equipment_Additio

Property and Equipment - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Property, Plant and Equipment [Abstract]	'	'	'	'
Depreciation	$8,227,768	$5,321,644	$15,716,641	$9,650,337

Accrued_Expenses_and_Other_Cur2

Accrued Expenses and Other Current Liabilities - (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Disclosure Summary Of Accrued Expenses And Other Current Liabilities [Abstract]	'	'
Taxes Payable, Current	$3,711	$4,187
Bonuses and commissions	19,754	22,322
Accrued compensation	13,629	16,610
Other employee expenses	14,201	11,926
Other	13,002	13,085
Total accrued expenses and other current liabilities	$64,297	$68,130

Notes_Payable_Details

Notes Payable (Details) (USD $)	3 Months Ended		6 Months Ended
Share data in Millions, except Per Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Nov. 06, 2013	Nov. 01, 2013
Debt Conversion [Line Items]	'	'	'	'	'	'	'
Notes face amount	'	'	$1,000	'	'	'	'
Contractual interest rate - Notes	'	'	'	'	'	0.00%	'
Notes Maturity Date	'	'	1-Nov-18	'	'	'	'
Notes, par value	575,000,000	'	575,000,000	'	575,000,000	'	575,000,000
Converted number of shares	'	'	7.8	'	'	'	'
Conversion rate	'	'	13.54	'	'	'	'
Initial conversion price, per share	'	'	'	'	'	$73.88	'
Terms of conversion feature	'	'	'July 1, 2018	'	'	'	'
Earliest date of conversion	'	'	31-Mar-14	'	'	'	'
Percentage of purchase price of Notes which should be paid upon fundamental change	'	'	100.00%	'	'	'	'
Price per share (USD)	$61.96	'	$61.96	'	$56.01	'	'
Remaining life of the Notes	'	'	'52 months	'	'	'	'
Amortization of debt discount and issuance cost	7,202,000	0	14,283,000	0	'	'	'
Noted Hedged shares of common stock covered	'	'	7.8	'	'	'	'
Purchase of convertible note hedge	'	'	135,800,000	'	'	'	'
Issuance of warrants (in shares)	7.8	'	7.8	'	'	'	'
Exercise price of warrants issued (USD per share)	'	'	'	'	'	107.46	'
Proceeds from issuance of warrants	'	'	84,500,000	'	'	'	'
Calendar Quarter End [Member]	'	'	'	'	'	'	'
Debt Conversion [Line Items]	'	'	'	'	'	'	'
Number of days out of 30 that common stock price exceeded conversion price, days	'	'	'20 days	'	'	'	'
Number of consecutive trading days in a period	'	'	'30 days	'	'	'	'
Calendar Quarter End [Member] | Minimum [Member]	'	'	'	'	'	'	'
Debt Conversion [Line Items]	'	'	'	'	'	'	'
Threshold percentage of stock price trigger	'	'	130.00%	'	'	'	'
Measurement Period [Member]	'	'	'	'	'	'	'
Debt Conversion [Line Items]	'	'	'	'	'	'	'
Number of days out of 30 that common stock price exceeded conversion price, days	'	'	'5 days	'	'	'	'
Number of consecutive trading days in a period	'	'	'5 days	'	'	'	'
Notes face amount	'	'	$1,000	'	'	'	'
Measurement Period [Member] | Maximum [Member]	'	'	'	'	'	'	'
Debt Conversion [Line Items]	'	'	'	'	'	'	'
Threshold percentage of stock price trigger	'	'	98.00%	'	'	'	'

Notes_Payable_Schedule_of_Note

Notes Payable - Schedule of Notes Payable (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Nov. 01, 2013
Convertible Notes Payable [Abstract]	'	'	'
Notes, par value	$575,000,000	$575,000,000	$575,000,000
Less: debt discount net of amortization	-145,975,000	-160,223,000	'
Convertible senior notes, net	$429,025,000	$414,777,000	'

Notes_Payable_Schedule_of_Inte

Notes Payable - Schedule of Interest Expense Recognized (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Convertible Notes Payable [Abstract]	'	'	'	'
Amortization of debt issuance cost	$386	'	$766	'
Amortization of premiums on investments	6,816	'	13,517	'
Amortization of debt discount and issuance cost	$7,202	$0	$14,283	$0
Effective interest rate of the liability component	6.50%	'	6.50%	'

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Loss - (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
In Thousands, unless otherwise specified
Statement of Comprehensive Income [Abstract]	'	'
Foreign currency translation adjustment	$452	($234)
Net unrealized loss on investments	148	-242
Accumulated other comprehensive loss, net of tax	$600	($476)

Stockholders_Equity_Additional

Stockholders' Equity - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Stockholders' Equity	'	'
Shares of common stock, authorized (shares)	600,000,000	'
Shares of common stock, issued and sold (shares)	145,174,006	'
Common Stock [Member]	'	'
Stockholders' Equity	'	'
Stock Issued During Period, Shares, New Issues	4,825,594	9,817,230

Stockholders_Equity_Outstandin

Stockholders' Equity - Outstanding and Reserved Shares of Common Stock for Future Issuance (Detail)	Jun. 30, 2014		Dec. 31, 2013
Common stock outstanding and reserved shares of common stock for future issuance	'		'
Options outstanding	19,375,640		23,399,374
Total reserved shares of common stock for future issuance	51,147,992		'
2005 Stock Option Plan [Member]	'		'
Common stock outstanding and reserved shares of common stock for future issuance	'		'
Total reserved shares of common stock for future issuance	0	[1]	'
2012 Equity Incentive Plan [Member]	'		'
Common stock outstanding and reserved shares of common stock for future issuance	'		'
Total reserved shares of common stock for future issuance	16,691,038	[1]	'
2012 Employee Stock Purchase Plan [Member]	'		'
Common stock outstanding and reserved shares of common stock for future issuance	'		'
Total reserved shares of common stock for future issuance	6,727,906	[1]	'
Stock Options [Member]	'		'
Common stock outstanding and reserved shares of common stock for future issuance	'		'
Options outstanding	19,375,640		'
Restricted Stock Units (RSUs) [Member]	'		'
Common stock outstanding and reserved shares of common stock for future issuance	'		'
RSUs	8,353,408		5,427,509
[1]	Refer to Note 11 for a description of these plans.

Stock_Awards_Additional_Inform

Stock Awards - Additional Information (Detail) (USD $)	6 Months Ended
In Millions, except Share data, unless otherwise specified	Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Shares of common stock, authorized (shares)	600,000,000
Shares of common stock reserved for issuance	51,147,992
Weighted-average grant date fair value of options granted (usd per share)	$31.48
Fair value of vested shares	$21.30
Total unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock options	59.1
Weighted-average remaining vesting period for unvested stock options	'2 years 4 months 18 days
Minimum Percent of Target Award of Stock Plan	0.00%
Maximum Percent of Target Award of Stock Plan	200.00%
Estimated Percentage of Performance Goal Target Earned	122.90%
Restricted Stock Units (RSUs) [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Compensation expense recognized, vesting term	'4 years
Weighted-average remaining vesting period for unvested stock options	'3 years 4 months 11 days
Unrecognized compensation expense expected to be recognized	$332.40
Restricted Stock Units (RSUs) [Member] | First Vesting Period [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Compensation expense recognized, vesting term	'3 months
Restricted Stock Units (RSUs) [Member] | Second Vesting Period [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Compensation expense recognized, vesting term	'3 months
Restricted Stock Units (RSUs) [Member] | Third Vesting Period [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Compensation expense recognized, vesting term	'3 months
Restricted Stock Units (RSUs) [Member] | Fourth Vesting Period [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Compensation expense recognized, vesting term	'3 months
2012 Equity Incentive Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of shares of common stock outstanding, increase, percentage	5.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	7,017,730
2012 Employee Stock Purchase Plan [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Number of shares of common stock outstanding, increase, percentage	1.00%
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized	1,403,546
Common stock purchase price percentage	85.00%
Award offering period	'6 months

Stock_Awards_Summary_of_stock_

Stock Awards - Summary of stock option activity (Detail) (USD $)	6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014
Summary of stock option activity	'
Number of Shares, Outstanding, Beginning Balance	23,399,374
Number of Shares, Granted	232,048
Number of Shares, Exercised	-3,792,101
Number of shares, Cancelled	-463,681
Number of Shares, Outstanding, Ending Balance	19,375,640
Number of Shares, Vested and expected to vest	19,089,638
Number of Shares, Vested and exercisable	9,616,984
Weighted-Average Exercise Price	'
Weighted-Average Exercise Price, Outstanding, Beginning Balance, usd per share	$9.07
Weighted-Average Exercise Price, Granted, usd per share	$64.82
Weighted-Average Exercise Price, Exercised, usd per share	$5.35
Weighted-Average Exercise Price Cancelled, usd per share	$24.47
Weighted-Average Exercise Price, Outstanding, Ending Balance, usd per share	$10.05
Weighted-Average Exercise Price, Vested and expected to vest, usd per share	$9.85
Weighted-Average Exercise Price, Vested and exercisable, usd per share	$6.35
Weighted-Average Remaining Contractual Life	'7 years 3 months 9 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest	'7 years 3 months 5 days
Weighted-Average Remaining Contractual Term, Vested and exercisable	'6 years 10 months 21 days
Aggregate Intrinsic Value, Exercised	$209,315
Aggregate Intrinsic Value, Outstanding	1,006,664
Aggregate Intrinsic Value, Vested and expected to vest	994,766
Aggregate Intrinsic Value, Vested and exercisable	$534,804

Stock_Awards_Stock_Awards_Rest

Stock Awards Stock Awards - Restricted Stock Unit Table (Details) (Restricted Stock Units (RSUs) [Member], USD $)	6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014
Restricted Stock Units (RSUs) [Member]	'
Shares Outstanding	'
Outstanding shares units beginning balance	5,427,509
Granted	4,083,379
Vested	-807,935
Forfeited	-349,545
Outstanding shares units ending balance	8,353,408
Expected to vest	7,806,579
Weighted-Average Grant Date Fair Value	'
Weighted-Average Grant Date Fair Value, Outstanding, Beginning Balance, usd per share	$34.02
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	$62.11
Weighted-Average Grant Date Fair Value, Vested, usd per share	$25.16
Weighted-Average Grant Date Fair Value, Repurchased, usd per share	$40.76
Weighted-Average Grant Date Fair Value, Outstanding, Ending Balance, usd per share	$48.32
Aggregate Intrinsic Value, vested	$45,691
Aggregate Intrinsic Value, Non-vested	517,577
Aggregated Intrinsic Value, Expected to vest	$483,696
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	8,353,408

Net_Income_Loss_Per_Share_Attr2

Net Income (Loss) Per Share Attributable to Common Stockholders - Calculation of Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Detail) (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:	'	'	'	'
Net loss	($50,363)	($21,405)	($93,674)	($34,763)
Net loss attributable to common stockholders - basic	-50,363	-21,405	-93,674	-34,763
Net loss attributable to common stockholders - diluted	($50,363)	($21,405)	($93,674)	($34,763)
Denominator:	'	'	'	'
Weighted-average shares used to compute net loss per share - basic and diluted	144,456,675	134,454,085	143,267,181	132,298,095
Net income (loss) per share attributable to common stockholders:	'	'	'	'
Earnings Per Share, Basic and Diluted	($0.35)	($0.16)	($0.65)	($0.26)

Net_Income_Loss_Per_Share_Attr3

Net Income (Loss) Per Share Attributable to Common Stockholders - Summary of Potentially Dilutive Securities (Detail)	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total potentially dilutive securities	43,528,622	31,815,977
Common stock options [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total potentially dilutive securities	19,375,640	27,534,924
Restricted Stock Units (RSUs) [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total potentially dilutive securities	8,353,408	3,861,621
Common stock subject to repurchase [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total potentially dilutive securities	45,879	150,522
ESPP obligations [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total potentially dilutive securities	187,649	268,910
Convertible Notes Payable [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total potentially dilutive securities	7,783,023	0
Warrant [Member]	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'
Total potentially dilutive securities	7,783,023	0

Income_Taxes_Income_Taxes_Deta

Income Taxes Income Taxes (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]	'	'	'	'
Effective income tax rate	-1.00%	-4.00%	-2.00%	-4.00%
Federal statutory rate	'	'	34.00%	34.00%

Information_about_Geographic_A2

Information about Geographic Areas - Revenues by Geographic Area, Based on Billing Location of Customer (Detail) (USD $)	3 Months Ended				6 Months Ended
In Thousands, unless otherwise specified	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Segment Reporting Information [Line Items]	'		'		'		'
Percentage of U.S. Revenues in North America	94.00%		94.00%		94.00%		94.00%
Revenues by geography	'		'		'		'
Revenues	$166,757		$102,222		$305,847		$188,161
North America [Member]	'		'		'		'
Revenues by geography	'		'		'		'
Revenues	114,261	[1]	71,855	[1]	209,225	[1]	132,001	[1]
EuropeMiddleEastAfrica [Member] [Domain]	'		'		'		'
Revenues by geography	'		'		'		'
Revenues	42,194	[2]	24,478	[2]	78,500	[2]	45,741	[2]
Asia Pacific and other [Member]	'		'		'		'
Revenues by geography	'		'		'		'
Revenues	$10,302		$5,889		$18,122		$10,419
[1]	Revenues attributed to the United States were approximately 94% of North America revenues for the three months ended June 30, 2014 and 2013 and the six months ended June 30, 2014 and 2013.
[2]	Europe, the Middle East and Africa

Information_about_Geographic_A3

Information about Geographic Areas - Long-lived Assets by Geographic Area (Detail) (USD $)	Jun. 30, 2014		Dec. 31, 2013
In Thousands, unless otherwise specified
Segment Reporting Information [Line Items]	'		'
Long-lived assets	$96,483		$75,560
North America [Member]	'		'
Segment Reporting Information [Line Items]	'		'
Long-lived assets	61,774		52,937
EuropeMiddleEastAfrica [Member] [Domain]	'		'
Segment Reporting Information [Line Items]	'		'
Long-lived assets	22,373	[1]	18,017	[1]
Asia Pacific and other [Member]	'		'
Segment Reporting Information [Line Items]	'		'
Long-lived assets	$12,336		$4,606
[1]	Europe, the Middle East and Africa

Subsequent_Event_Details

Subsequent Event (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2014	Jul. 11, 2014	Sep. 30, 2014	Jul. 11, 2014	Sep. 30, 2014	Jul. 11, 2014	Sep. 30, 2014	Jul. 11, 2014
			Subsequent Event [Member]	Neebula Systems [Member]	Developed Technology Rights [Member]	Developed Technology Rights [Member]	Unbilled Revenues [Member]	Unbilled Revenues [Member]	Trade Names [Member]	Trade Names [Member]
				Subsequent Event [Member]	Neebula Systems [Member]	Neebula Systems [Member]	Neebula Systems [Member]	Neebula Systems [Member]	Neebula Systems [Member]	Neebula Systems [Member]
					Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]	Subsequent Event [Member]
Business Combination, Consideration Transferred	'	'	$100,000,000	'	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net	'	'	'	-118,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill	'	'	'	'	'	56,200,000	'	600,000	'	300,000
Finite-Lived Intangible Asset, Useful Life	'	'	'	'	'5 years 6 months	'	'1 year 6 months	'	'1 year 6 months	'
Goodwill	8,622,000	8,724,000	'	54,564,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent	'	'	'	-11,319,000	'	'	'	'	'	'
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net	'	'	'	$100,463,000	'	'	'	'	'	'