ServiceNow (NOW) 10-Q 4 Nov 16 2016 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information shares in Millions	9 Months Ended
	Sep. 30, 2016shares
Document and Entity Information [Abstract]
Entity Registrant Name	SERVICENOW, INC.
Trading Symbol	NOW
Entity Central Index Key	1,373,715
Document Type	10-Q
Document Period End Date	Sep. 30, 2016
Amendment Flag	false
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	166

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 325,067	$ 412,305
Short-term investments	481,813	388,945
Accounts receivable, net	220,089	203,333
Current portion of deferred commissions	62,657	51,976
Prepaid expenses and other current assets	37,281	29,076
Total current assets	1,126,907	1,085,635
Deferred commissions, less current portion	44,597	33,016
Long-term investments	281,353	422,667
Property and equipment, net	176,106	144,714
Intangible assets, net	60,726	43,005
Goodwill	84,425	55,669
Other assets	39,000	22,346
Total assets	1,813,114	1,807,052
Current liabilities:
Accounts payable	30,012	37,369
Accrued expenses and other current liabilities	124,670	101,264
Current portion of deferred revenue	743,657	593,003
Total current liabilities	898,339	731,636
Deferred revenue, less current portion	18,048	10,751
Convertible senior notes, net	499,280	474,534
Other long-term liabilities	34,944	23,317
Total liabilities	1,450,611	1,240,238
Stockholders’ equity:
Common stock	165	160
Additional paid-in capital	1,343,604	1,140,545
Accumulated other comprehensive loss	(16,465)	(16,882)
Accumulated deficit	(964,801)	(557,009)
Total stockholders’ equity	362,503	566,814
Total liabilities and stockholders’ equity	$ 1,813,114	$ 1,807,052

Condensed Consolidated Statemen

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Subscription		$ 318,934	$ 223,208	$ 877,035	$ 603,576
Professional services and other		38,722	37,942	127,812	116,254
Total revenues		357,656	261,150	1,004,847	719,830
Cost of revenues(1):
Subscription	[1]	61,566	46,053	170,707	133,889
Professional services and other	[1]	41,271	35,835	123,039	104,615
Total cost of revenues	[1]	102,837	81,888	293,746	238,504
Gross profit		254,819	179,262	711,101	481,326
Operating expenses(1):
Sales and marketing	[1]	166,491	117,899	511,607	364,530
Research and development	[1]	75,018	55,822	211,306	158,946
General and administrative	[1]	40,085	33,581	117,393	93,357
Legal settlements	[1]	0	0	270,000	0
Total operating expenses	[1]	281,594	207,302	1,110,306	616,833
Loss from operations		(26,775)	(28,040)	(399,205)	(135,507)
Interest expense		(8,389)	(7,839)	(24,746)	(23,124)
Interest and other income (expense), net		1,783	(3,952)	4,745	1,273
Loss before provision for income taxes		(33,381)	(39,831)	(419,206)	(157,358)
Provision for income taxes		2,877	1,199	9	3,690
Net loss		$ (36,258)	$ (41,030)	$ (419,215)	$ (161,048)
Net loss per share, basic and diluted (in USD per share)		$ (0.22)	$ (0.26)	$ (2.56)	$ (1.04)
Weighted-average shares used to compute net loss per share - basic and diluted		165,378,836	156,930,506	163,767,329	154,352,037
Other comprehensive gain (loss):
Foreign currency translation adjustments		$ 203	$ (2,689)	$ (1,106)	$ (3,028)
Unrealized gain (loss) on investments, net of tax		(615)	(111)	1,523	69
Other comprehensive gain (loss), net of tax		(412)	(2,800)	417	(2,959)
Comprehensive loss		(36,670)	(43,830)	(418,798)	(164,007)
Stock-based compensation		81,087	65,111	234,460	189,531
Cost of revenues - subscription
Stock-based compensation		7,140	5,951	20,698	17,183
Cost of revenues - professional services and other
Stock-based compensation		7,150	5,804	20,045	16,788
Sales and Marketing
Stock-based compensation		31,898	26,011	95,757	74,690
Research And Development
Stock-based compensation		21,376	18,130	62,956	51,703
General and Administrative Expense
Stock-based compensation		$ 13,523	$ 9,215	$ 35,004	$ 29,167
[1]	Includes stock-based compensation as follows: Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015Cost of revenues:       Subscription$7,140 $5,951 $20,698 $17,183Professional services and other7,150 5,804 20,045 16,788Sales and marketing31,898 26,011 95,757 74,690Research and development21,376 18,130 62,956 51,703General and administrative13,523 9,215 35,004 29,167Total stock-based compensation$81,087 $65,111 $234,460 $189,531

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss (Parenthetical) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Stock-based compensation	$ 81,087	$ 65,111	$ 234,460	$ 189,531
Cost of revenues - subscription
Stock-based compensation	7,140	5,951	20,698	17,183
Cost of revenues - professional services and other
Stock-based compensation	7,150	5,804	20,045	16,788
Sales and Marketing
Stock-based compensation	31,898	26,011	95,757	74,690
Research And Development
Stock-based compensation	21,376	18,130	62,956	51,703
General and Administrative Expense
Stock-based compensation	$ 13,523	$ 9,215	$ 35,004	$ 29,167

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net loss	$ (419,215)	$ (161,048)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	59,716	43,957
Amortization of premiums on investments	3,745	5,380
Amortization of deferred commissions	57,742	48,055
Amortization of debt discount and issuance costs	24,746	23,124
Stock-based compensation	234,460	189,531
Deferred income tax	(5,095)	0
Other	(857)	(5,393)
Changes in operating assets and liabilities, net of effect of business combinations:
Accounts receivable	(15,761)	(5,303)
Deferred commissions	(79,190)	(54,168)
Prepaid expenses and other assets	(11,733)	(8,915)
Accounts payable	(8,625)	8,312
Deferred revenue	151,019	115,812
Accrued expenses and other liabilities	36,282	11,856
Net cash provided by operating activities(1)	27,234	211,200	[1]
Cash flows from investing activities:
Purchases of property and equipment	(84,112)	(62,588)
Business combinations, net of cash acquired	(34,297)	(1,100)
Purchases of other intangibles	(14,850)	0
Purchases of investments	(434,397)	(543,167)
Purchases of strategic investments	0	(10,000)
Sales of investments	266,288	242,631
Maturities of investments	218,452	203,632
Restricted cash	(322)	(408)
Net cash used in investing activities	(83,238)	(171,000)
Cash flows from financing activities:
Proceeds related to deferred payments on purchase of other intangibles	4,100	0
Payments related to deferred payments on purchase of other intangibles	(1,025)	0
Proceeds from employee stock plans	55,063	73,347
Taxes paid related to net share settlement of equity awards	(88,567)	(12,603)
Payments on financing obligation	(336)	(112)
Net cash (used in) provided by financing activities(1)	(30,765)	60,632	[1]
Foreign currency effect on cash and cash equivalents	(469)	(4,214)
Net (decrease) increase in cash and cash equivalents	(87,238)	96,618
Cash and cash equivalents at beginning of period	412,305	252,455
Cash and cash equivalents at end of period	325,067	349,073
Supplemental disclosures of non-cash investing activities:
Property and equipment included in accounts payable and accrued expenses	$ 9,691	14,381
New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Net cash provided by operating activities(1)		1,200
Net cash (used in) provided by financing activities(1)		$ (1,200)
[1]	(1)During the nine months ended September 30, 2016, we early adopted Accounting Standards Update 2016-09, "Compensation-Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting." Refer to Note 2 Recent Accounting Pronouncements for further details. This adoption resulted in a $1.2 million increase in net cash provided by operating activities and a corresponding $1.2 million decrease in net cash provided by financing activities for the nine months ended September 30, 2015.

Description of the Business

Description of the Business	9 Months Ended
	Sep. 30, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of the Business	Description of the Business

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2016
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 applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles, or GAAP, for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring items) considered necessary for fair statement of results for the interim periods presented have been included. The results of operations for the three and nine months ended September 30, 2016 are not necessarily indicative of the results to be expected for the year ended December 31, 2016 or for other interim periods or for future years. The condensed consolidated balance sheet as of December 31, 2015 is derived from audited financial statements as of that date, however, it does not include all of the information and footnotes required by GAAP 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 Annual Report on Form 10-K for the year ended December 31, 2015 , which was filed with the SEC on February 25, 2016. Principles of Consolidation The condensed consolidated financial statements have been prepared in conformity with GAAP and include our accounts and the accounts of our wholly-owned subsidiaries. All significant intercompany transactions and balances have been eliminated upon consolidation. Prior Period Reclassification Certain reclassifications of prior period amounts have been made to conform to the current period presentation. Use of Estimates The preparation of condensed 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 condensed consolidated financial statements, as well as reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Warranties and Indemnification Our cloud computing solutions are typically warranted to perform in material conformance with their specifications. We include service level commitments to our customers that permit those customers to receive credits in the event we fail to meet those service levels. We establish an accrual based on an evaluation of the known service disruptions. Service level credit accrual charges are recorded against revenue and were not material for all periods presented. 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. The fair values of these obligations are not material as of each balance sheet date. Our agreements include provisions indemnifying customers against intellectual property and other third-party claims. We have not incurred any costs as a result of such indemnification obligations and have not recorded any liabilities related to such obligations in the condensed consolidated financial statements. New Accounting Pronouncements Adopted in 2016 In March 2016, the FASB issued ASU 2016-09, "Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting," which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. This standard is effective for our interim and annual reporting periods beginning January 1, 2017, and early adoption is permitted. We elected to early adopt this standard in the quarter ended June 30, 2016. The impact of the early adoption was as follows: • The standard eliminates additional paid in capital (APIC) pools and requires excess tax benefits and tax deficiencies to be recorded in the income statement as a discrete item when the awards vest or are settled. The adoption of this guidance on a prospective basis resulted in the recognition of excess tax benefits in our provision for income taxes of $0.3 million and $2.0 million for the three and nine months ended September 30, 2016 , respectively. • The standard requires excess tax benefits to be recognized regardless of whether the benefit reduces taxes payable. The adoption of this guidance on a modified retrospective basis resulted in the recognition of a cumulative-effect adjustment of $11.4 million that reduced our accumulated deficit and increased our foreign long-term deferred income tax as of January 1, 2016. The previously unrecognized U.S. excess tax effects were recorded as a deferred tax asset net of a valuation allowance. • We have elected to continue to estimate forfeitures expected to occur to determine the amount of stock-based compensation cost to be recognized in each period. As such, the guidance relating to forfeitures did not have an impact on our accumulated deficit as of January 1, 2016. • We elected to apply the statement of cash flows guidance that cash flows related to excess tax benefits be presented as an operating activity retrospectively, which resulted in a $1.2 million increase to net cash provided by operating activities and a corresponding decrease to net cash provided by financing activities in the accompanying condensed consolidated statement of cash flows for the nine months ended September 30, 2015 , as compared to the amounts previously reported. • The statement of cash flows guidance that cash flows related to employee taxes paid for withheld shares be presented as a financing activity had no impact on our condensed consolidated financial statements as we have historically presented such cash flows as a financing activity. In September 2015, the FASB issued ASU 2015-16, “Simplifying the Accounting for Measurement-Period Adjustments (Topic 805),” which eliminates the requirement to restate prior period financial statements for measurement period adjustments in business combinations. This new standard requires that the cumulative impact of a measurement period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified. We adopted this standard during the three months ended March 31, 2016 on a prospective basis and the adoption had no material impact on our condensed consolidated financial statements. In April 2015, the FASB issued ASU 2015-05, "Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement." ASU 2015-05 provides guidance to customers about whether a cloud computing arrangement includes software. If a cloud computing arrangement includes a software license, the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. We adopted this standard during the three months ended March 31, 2016 on a prospective basis and the adoption had no material impact on our condensed consolidated financial statements. Pending Accounting Pronouncements In October 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-16, "Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory," which includes a revision of the accounting for the income tax consequences of intra-entity transfers of assets other than inventory to reduce the complexity in accounting standards. This standard is effective for our interim and annual reporting periods beginning after December 15, 2017, and early adoption is permitted. We are currently evaluating the impact of this standard on our condensed consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments," which provides guidance on eight specific cash flow issues. Among these issues, this standard requires, at the settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowings, the portion of the cash payment attributable to the accreted interest related to the debt discount to be classified as cash flows for operating activities, and the portion of the cash payments attributable to the principal to be classified as cash outflows for financing activities. This standard is effective for our interim and annual reporting periods beginning after December 15, 2017, and early adoption is permitted. We are currently evaluating the impact of this standard on our condensed consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments," which requires a financial asset measured at amortized cost basis to be presented at the net amount expected to be collected. Credit losses relating to available-for-sale debt securities should be recorded through an allowance for credit losses. This standard is effective for our interim and annual reporting periods beginning after December 15, 2019. We are currently evaluating the impact of this standard on our condensed consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)," which requires lessees to generally recognize on the balance sheet operating and financing lease liabilities and corresponding right-of-use assets, and to recognize on the income statement the expenses in a manner similar to current practice. This new standard is effective for our interim and annual periods beginning January 1, 2019 and early adoption is permitted. While we are currently evaluating the impact of this standard on our condensed consolidated financial statements, we anticipate this standard will have a material impact on our condensed consolidated balance sheets given that we have operating lease commitments of approximately $300 million as of September 30, 2016 . However, we do not anticipate this standard will have a material impact on our condensed consolidated statements of comprehensive loss since the expense recognition under this new standard will be similar to current practice. In January 2016, the FASB issued ASU 2016-01, "Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities," which addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. This new standard is effective for our interim and annual periods beginning January 1, 2018 and early adoption is not permitted. We are currently evaluating the impact of this standard on our condensed consolidated financial statements.

Investments

Investments	9 Months Ended
	Sep. 30, 2016
Available-for-sale Securities [Abstract]
Investments	Investments Marketable Securities The following is a summary of our available-for-sale investment securities, excluding those securities classified within cash and cash equivalents on the consolidated balance sheets (in thousands): September 30, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Available-for-sale securities: Commercial paper $ 61,726 $ — $ — $ 61,726 Corporate notes and bonds 629,143 513 (553 ) 629,103 Certificates of deposit 33,417 — — 33,417 U.S. government agency securities 38,908 26 (14 ) 38,920 Total available-for-sale securities $ 763,194 $ 539 $ (567 ) $ 763,166 December 31, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Available-for-sale securities: Commercial paper $ 32,430 $ 2 $ (38 ) $ 32,394 Corporate notes and bonds 617,054 7 (2,027 ) 615,034 Certificates of deposit 29,610 2 (17 ) 29,595 U.S. government agency securities 134,962 1 (374 ) 134,589 Total available-for-sale securities $ 814,056 $ 12 $ (2,456 ) $ 811,612 As of September 30, 2016 , the contractual maturities of our investments did not exceed 24 months. The fair values of available-for-sale investments, by remaining contractual maturity, are as follows (in thousands): September 30, 2016 Due in 1 year or less $ 481,813 Due in 1 year through 2 years 281,353 Total $ 763,166 We had certain available-for-sale securities in a gross unrealized loss position, substantially 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 securities, classified by the length of time that the securities have been in a continuous unrealized loss position, and aggregated by investment types (in thousands): September 30, 2016 Less than 12 Months 12 Months or Greater Total Fair Value Gross Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Corporate notes and bonds $ 367,093 $ (553 ) $ 600 $ — $ 367,693 $ (553 ) U.S. government agency securities 21,401 (14 ) — — 21,401 (14 ) Total $ 388,494 $ (567 ) $ 600 $ — $ 389,094 $ (567 ) December 31, 2015 Less than 12 Months 12 Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Commercial paper $ 24,913 $ (38 ) $ — $ — $ 24,913 $ (38 ) Corporate notes and bonds 539,586 (1,897 ) 60,099 (130 ) 599,685 (2,027 ) Certificates of deposit 19,750 (17 ) — — 19,750 (17 ) U.S. government agency securities 132,581 (374 ) — — 132,581 (374 ) Total $ 716,830 $ (2,326 ) $ 60,099 $ (130 ) $ 776,929 $ (2,456 ) Strategic Investments We account for our investments in non-marketable equity securities of certain privately-held companies under the cost method, as we have less than a 20% ownership interest and we do not have the ability to exercise significant influence over the operations of these companies. The carrying value of these investments was $10.5 million as of September 30, 2016 and December 31, 2015

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2016
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 measured at fair value on a recurring basis at September 30, 2016 (in thousands): Level 1 Level 2 Total Cash equivalents: Money market funds $ 114,850 $ — $ 114,850 Short-term investments: Commercial paper — 61,726 61,726 Corporate notes and bonds — 376,862 376,862 Certificates of deposit — 32,712 32,712 U.S. government agency securities — 10,513 10,513 Long-term investments: Corporate notes and bonds — 252,240 252,240 Certificates of deposit — 705 705 U.S. government agency securities — 28,408 28,408 Total $ 114,850 $ 763,166 $ 878,016 The following table presents our fair value hierarchy for our assets measured at fair value on a recurring basis at December 31, 2015 (in thousands): Level 1 Level 2 Total Cash equivalents: Money market funds $ 263,515 $ — $ 263,515 Commercial paper — 2,000 2,000 Corporate notes and bonds — 1,119 1,119 Short-term investments: Commercial paper — 32,394 32,394 Corporate notes and bonds — 303,567 303,567 Certificates of deposit — 23,736 23,736 U.S. government agency securities — 29,248 29,248 Long-term investments: Corporate notes and bonds — 311,467 311,467 Certificates of deposit — 5,859 5,859 U.S. government agency securities — 105,341 105,341 Total $ 263,515 $ 814,731 $ 1,078,246 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.

Business Combinations

Business Combinations	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Business Combinations	Business Combinations BrightPoint Security On June 3, 2016, we completed the acquisition of a privately-held company, BrightPoint Security, Inc. (BrightPoint), by acquiring all issued and outstanding common shares of BrightPoint for approximately $19.6 million in an all-cash transaction to expand our security operations solutions. The following table summarizes the allocation of the purchase price to the fair value of the tangible and intangible assets acquired and liabilities assumed as of the acquisition date: Purchase Price Allocation (in thousands) Useful Life (in years) Intangible assets: Developed technology $ 8,100 6 Customer contracts and related relationships 500 1.5 Goodwill 15,258 Net tangible liabilities acquired (1,339 ) Net deferred tax liabilities (1) (2,890 ) Total purchase price $ 19,629 (1) Deferred tax liabilities, net primarily relates to purchased identifiable intangible assets and is shown net of deferred tax assets. ITapp On April 8, 2016, we completed the acquisition of a privately-held company, ITapp Inc. (ITapp), by acquiring all issued and outstanding common shares of ITapp for approximately $14.5 million in an all-cash transaction to expand our IT operations management solutions. The following table summarizes the allocation of the purchase price to the fair value of the tangible and intangible assets acquired and liabilities assumed as of the acquisition date: Purchase Price Allocation (in thousands) Useful Life (in years) Net tangible assets acquired $ 140 Intangible assets: Developed technology 4,700 5 Customer contracts and related relationships 200 1.5 Goodwill 11,437 Net deferred tax liabilities (2,015 ) Total purchase price $ 14,462 For both business combinations, the excess of purchase consideration over the fair value of net tangible and identifiable intangible assets acquired was recorded as goodwill. We believe the goodwill represents the synergies expected from expanded market opportunities when integrating the acquired technologies with our offerings. The goodwill balance for both business combinations is not deductible for income tax purposes. Acquisition-related costs of $1.0 million are included in general and administrative expenses in our consolidated statements of comprehensive loss.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2016
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, 2015 $ 55,669 Goodwill acquired 26,695 Foreign currency translation adjustments 2,061 Balance as of September 30, 2016 $ 84,425 Intangible assets consist of the following (in thousands): September 30, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 80,453 $ (27,580 ) $ 52,873 Other 9,275 (1,422 ) 7,853 Total intangible assets $ 89,728 $ (29,002 ) $ 60,726 December 31, 2015 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 58,144 $ (17,463 ) $ 40,681 Other 3,695 (1,371 ) 2,324 Total intangible assets $ 61,839 $ (18,834 ) $ 43,005 Amortization expense for intangible assets for the three months ended September 30, 2016 and 2015 was approximately $4.3 million and $2.9 million , respectively, and for the nine months ended September 30, 2016 and 2015 was approximately $10.9 million and $8.8 million

Property and Equipment

Property and Equipment	9 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment, net consists of the following (in thousands): September 30, December 31, 2016 2015 Computer equipment and software $ 238,661 $ 180,197 Leasehold improvements 35,418 31,659 Furniture and fixtures 29,981 26,017 Building 6,570 6,318 Construction in progress 5,088 1,886 315,718 246,077 Less: Accumulated depreciation (139,612 ) (101,363 ) Total property and equipment, net $ 176,106 $ 144,714 Construction in progress consists primarily of leasehold improvements and in-process software development costs. Depreciation expense for the three months ended September 30, 2016 and 2015 was $17.9 million and $12.2 million , respectively, and for the nine months ended September 30, 2016 and 2015 was $48.7 million and $35.1 million

Accrued Expenses and Other Curr

Accrued Expenses and Other Current Liabilities	9 Months Ended
	Sep. 30, 2016
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): September 30, December 31, 2016 2015 Taxes payable $ 11,452 $ 9,080 Bonuses and commissions 46,253 33,124 Accrued compensation 25,724 17,089 Other employee related liabilities 18,602 21,529 Other 22,639 20,442 Total accrued expenses and other current liabilities $ 124,670 $ 101,264

Convertible Senior Notes

Convertible Senior Notes	9 Months Ended
	Sep. 30, 2016
Convertible Notes Payable [Abstract]
Convertible Senior Notes	Convertible Senior Notes In November 2013 , we issued 0% convertible senior notes due November 1, 2018 with an aggregate principal amount of $575 million , or 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, or the measurement period, in which the trading price per $1,000 principal amount of the 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, or the debt discount, is amortized to interest expense using the effective interest method over the term of the Notes. 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): September 30, 2016 December 31, 2015 Liability: Principal $ 575,000 $ 575,000 Less: debt issuance cost and debt discount, net of amortization (75,720 ) (100,466 ) Net carrying amount $ 499,280 $ 474,534 We consider the fair value of the Notes at September 30, 2016 and December 31, 2015 to be a Level 2 measurement. The estimated fair values of the Notes were $701.8 million and $741.8 million at September 30, 2016 and December 31, 2015 , respectively (based on the closing trading price per $100 of the Notes on September 30, 2016 and December 31, 2015 , respectively). The Notes were not convertible as of September 30, 2016 and December 31, 2015 . As of September 30, 2016 , the remaining life of the Notes is 25 months. The following table sets forth total interest expense recognized related to the Notes (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Amortization of debt issuance cost $ 450 $ 420 $ 1,327 $ 1,240 Amortization of debt discount 7,939 7,419 23,419 21,884 Total $ 8,389 $ 7,839 $ 24,746 $ 23,124 Effective interest rate of the liability component 6.5% Note Hedge To minimize the impact of potential economic dilution upon conversion of the Notes, we entered into convertible note hedge transactions, or 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, or 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

Accumulated Other Comprehensive

Accumulated Other Comprehensive Loss	9 Months Ended
	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss The components of accumulated other comprehensive loss, net of tax, consist of the following (in thousands): September 30, December 31, 2016 2015 Foreign currency translation adjustment $ (15,544 ) $ (14,438 ) Net unrealized loss on investments, net of tax (921 ) (2,444 ) Accumulated other comprehensive loss $ (16,465 ) $ (16,882 )

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2016
Disclosure Common Stock Outstanding And Reserved Shares Of Common Stock For Future Issuance [Abstract]
Stockholders' Equity	Stockholders' Equity Common Stock We were authorized to issue 600,000,000 shares of common stock as of September 30, 2016 . Holders of our common stock are not entitled to receive dividends unless declared by our board of directors. As of September 30, 2016 , we had 166,011,100 shares of common stock outstanding and had reserved shares of common stock for future issuance as follows: September 30, 2016 Stock option plans: Options outstanding 6,475,548 RSUs 12,834,324 Stock awards available for future grants: 2012 Equity Incentive Plan (1) 21,051,913 2012 Employee Stock Purchase Plan (1) 8,566,803 Total reserved shares of common stock for future issuance 48,928,588 (1) Refer to Note 12 for a description of these plans. During the nine months ended September 30, 2016 and 2015 , we issued a total of 5,225,336 shares and 8,586,233

Stock Awards

Stock Awards	9 Months Ended
	Sep. 30, 2016
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, 2016 , 8,039,288 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 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. 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. On January 1, 2016 , 1,607,858 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 nine months ended September 30, 2016 is as follows: Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (in thousands) Outstanding at December 31, 2015 8,255,554 $ 16.65 Granted 169,400 65.92 Exercised (579,504 ) 5.28 $ 35,876 Canceled (126,735 ) 58.05 Outstanding at March 31, 2016 7,718,715 17.90 Granted 131,835 68.36 Exercised (828,327 ) 17.18 $ 43,757 Canceled (119,321 ) 52.26 Outstanding at June 30, 2016 6,902,902 18.36 Granted 232,750 74.47 Exercised (477,802 ) 15.69 $ 28,345 Canceled (182,302 ) 58.41 Outstanding at September 30, 2016 6,475,548 $ 19.44 5.54 $ 386,791 Vested and expected to vest as of September 30, 2016 6,370,923 $ 18.62 5.48 $ 385,785 Vested and exercisable as of September 30, 2016 5,548,381 $ 11.91 5.01 $ 373,084 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 $27.90 for the nine months ended September 30, 2016 . The total fair value of stock options vested during the nine months ended September 30, 2016 was $14.2 million . As of September 30, 2016 , total unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock options was approximately $20.7 million . The weighted-average remaining vesting period of unvested stock options at September 30, 2016 was 2.83 years . RSUs A summary of RSU activity for the nine months ended September 30, 2016 is as follows: Number of Shares Weighted Average Grant Date Fair Value (Per Share) Aggregate Intrinsic Value (in thousands) Outstanding at December 31, 2015 12,417,805 $ 63.38 Granted 3,822,832 51.11 Vested (1,708,179 ) 58.42 $ 89,516 Forfeited (370,545 ) 64.43 Outstanding at March 31, 2016 14,161,913 60.64 Granted 805,680 67.75 Vested (1,285,704 ) 53.70 $ 86,693 Forfeited (407,451 ) 63.31 Outstanding at June 30, 2016 13,274,438 61.66 Granted 1,423,601 74.62 Vested (1,132,142 ) 63.56 $ 85,816 Forfeited (731,573 ) 61.29 Non-vested and outstanding at September 30, 2016 12,834,324 $ 62.95 $ 1,015,837 Expected to vest as of September 30, 2016 10,843,628 $ 858,273 RSUs granted to employees under the 2005 Plan and the 2012 Plan generally vest over a four-year period. As of September 30, 2016 , total unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested RSUs was approximately $603.8 million and the weighted-average remaining vesting period was 2.84 years

Net Loss Per Share

Net Loss Per Share	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Net Loss Per Share	Net Loss Per Share The following table presents the calculation of basic and diluted net loss per share (in thousands, except share and per share data): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Numerator: Net loss $ (36,258 ) $ (41,030 ) $ (419,215 ) $ (161,048 ) Denominator: Weighted-average shares outstanding—basic and diluted 165,378,836 156,930,506 163,767,329 154,352,037 Net loss per share—basic and diluted: $ (0.22 ) $ (0.26 ) $ (2.56 ) $ (1.04 ) 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: September 30, 2016 2015 Common stock options 6,475,548 10,235,318 Restricted stock units 12,834,324 12,716,479 ESPP obligations 360,536 270,426 Convertible senior notes 7,783,023 7,783,023 Warrants related to the issuance of convertible senior notes 7,783,023 7,783,023 Total potentially dilutive securities 35,236,454 38,788,269

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2016
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 income (loss) from recurring operations and adjust the provision for discrete tax items recorded in the period. Our effective tax rate was (9)% and 0% for the three and nine months ended September 30, 2016 , 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 operations, the foreign tax rate differential, a release of the valuation allowance in connection with acquisitions, and tax effects of stock option excess tax benefits from the early adoption of ASU 2016-09. Our effective tax rate was (3)% and (2)% for the three and nine months ended September 30, 2015 , 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 operations, the foreign tax rate differential, non-deductible expenses arising from stock-based compensation, and the tax effects of unrealized gains in investment securities. As described in Note 2 "Summary of Significant Accounting Policies," we adopted ASU 2016-09 in the quarter ended June 30, 2016. See Note 2 for further discussion. We are subject to taxation in the United States and foreign jurisdictions. As of September 30, 2016 , our tax years 2005 to 2015 remain subject to examination in most jurisdictions.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2016
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. 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 or range of loss. Generally, our subscription agreements require us to defend 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 (Hewlett-Packard) filed a lawsuit against us in the U.S. District Court for the Northern District of California. The lawsuit alleged patent infringement and sought damages and an injunction. On or about November 1, 2015, Hewlett Packard Enterprise Company (HPE) separated from Hewlett-Packard as an independent company, and Hewlett-Packard assigned to HPE all right, title, and interest in the eight Hewlett-Packard patents in the lawsuit and HPE was substituted as plaintiff in the litigation. On March 4, 2016, we entered into a confidential settlement agreement resolving the lawsuit with HPE (HPE Settlement). As a result, on March 9, 2016, the lawsuit was dismissed. BMC Software, Inc. (BMC) filed lawsuits against us in the U.S. District Court for the Eastern District of Texas on September 23, 2014 and February 12, 2016, and in the Dusseldorf (Germany) Regional Court, Patent Division, on March 2, 2016. Each of the lawsuits alleged patent infringement and sought damages and an injunction. On April 8, 2016, we entered into a confidential settlement agreement resolving all the lawsuits with BMC (BMC Settlement). As a result, the second Texas lawsuit was dismissed on April 14, 2016, and each of the initial Texas lawsuit and the German lawsuit was dismissed on April 25, 2016. These settlements are considered multiple element arrangements for accounting purposes. We evaluated the accounting treatment of these settlements by identifying each element of the arrangements, which included amongst other elements, a release of past infringement claims and a covenant not to sue for a specified term of years. The primary benefit we received from the arrangements was the settlement and termination of all existing litigation, the avoidance of future litigation expenses and the avoidance of future management and customer disruptions. We determined that none of the elements of the settlement agreements have identifiable future benefits that would be capitalized as an asset. Accordingly, we recorded charges for aggregate legal settlements of $270.0 million in our condensed consolidated statement of comprehensive loss for the nine months ended September 30, 2016 . The charge covers the fulfillment by us of all financial obligations under both the BMC Settlement and HPE Settlement with no remaining financial obligations under either settlement. Apart from the $267.5 million cash paid for aggregate legal settlements during the nine months ended September 30, 2016 , 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, 2015

Information about Geographic Ar

Information about Geographic Areas and Products	9 Months Ended
	Sep. 30, 2016
Segments, Geographical Areas [Abstract]
Information about Geographic Areas and Products	Information about Geographic Areas and Products Revenues by geographic area, based on the location of our users, were as follows for the periods presented (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 North America (1) $ 239,585 $ 181,293 $ 684,111 $ 504,326 EMEA (2) 90,399 61,663 246,745 165,996 Asia Pacific and other 27,672 18,194 73,991 49,508 Total revenues $ 357,656 $ 261,150 $ 1,004,847 $ 719,830 Property and equipment, net by geographic area were as follows (in thousands): September 30, December 31, 2016 2015 North America (3) $ 128,649 $ 104,085 EMEA (2) 35,618 32,027 Asia Pacific and other 11,839 8,602 Total property and equipment, net $ 176,106 $ 144,714 (1) Revenues attributed to the United States were approximately 95% of North America revenues for each of the three months ended September 30, 2016 and 2015 and nine months ended September 30, 2016 and 2015 . (2) Europe, the Middle East and Africa (3) Property and equipment, net attributed to the United States were approximately 92% and 98% of property and equipment, net attributable to North America as of September 30, 2016 and December 31, 2015 , respectively. Subscription revenues consist of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Enterprise Service Management solutions $ 290,005 $ 205,795 $ 800,534 $ 559,080 IT Operations Management solutions 28,929 17,413 76,501 44,496 Total subscription revenues $ 318,934 $ 223,208 $ 877,035 $ 603,576

Summary of Significant Accoun22

Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements and condensed footnotes have been prepared in accordance with the applicable rules and regulations of the Securities and Exchange Commission (SEC) regarding interim financial reporting. Accordingly, they do not include all of the information and footnotes required by U.S. generally accepted accounting principles, or GAAP, for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring items) considered necessary for fair statement of results for the interim periods presented have been included. The results of operations for the three and nine months ended September 30, 2016 are not necessarily indicative of the results to be expected for the year ended December 31, 2016 or for other interim periods or for future years. The condensed consolidated balance sheet as of December 31, 2015 is derived from audited financial statements as of that date, however, it does not include all of the information and footnotes required by GAAP 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 Annual Report on Form 10-K for the year ended December 31, 2015
Principles of Consolidation	Principles of Consolidation
Prior Period Reclassification	Prior Period Reclassification
Use of Estimates	Use of Estimates
Warranties and Indemnification	Warranties and Indemnification Our cloud computing solutions are typically warranted to perform in material conformance with their specifications. We include service level commitments to our customers that permit those customers to receive credits in the event we fail to meet those service levels. We establish an accrual based on an evaluation of the known service disruptions. Service level credit accrual charges are recorded against revenue and were not material for all periods presented. 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. The fair values of these obligations are not material as of each balance sheet date. Our agreements include provisions indemnifying customers against intellectual property and other third-party claims. We have not incurred any costs as a result of such indemnification obligations and have not recorded any liabilities related to such obligations in the condensed consolidated financial statements.
Recent Accounting Pronouncements	In March 2016, the FASB issued ASU 2016-09, "Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting," which simplifies several aspects of the accounting for employee share-based payment transactions, including the accounting for income taxes, forfeitures, and statutory tax withholding requirements, as well as classification in the statement of cash flows. This standard is effective for our interim and annual reporting periods beginning January 1, 2017, and early adoption is permitted. We elected to early adopt this standard in the quarter ended June 30, 2016. The impact of the early adoption was as follows: • The standard eliminates additional paid in capital (APIC) pools and requires excess tax benefits and tax deficiencies to be recorded in the income statement as a discrete item when the awards vest or are settled. The adoption of this guidance on a prospective basis resulted in the recognition of excess tax benefits in our provision for income taxes of $0.3 million and $2.0 million for the three and nine months ended September 30, 2016 , respectively. • The standard requires excess tax benefits to be recognized regardless of whether the benefit reduces taxes payable. The adoption of this guidance on a modified retrospective basis resulted in the recognition of a cumulative-effect adjustment of $11.4 million that reduced our accumulated deficit and increased our foreign long-term deferred income tax as of January 1, 2016. The previously unrecognized U.S. excess tax effects were recorded as a deferred tax asset net of a valuation allowance. • We have elected to continue to estimate forfeitures expected to occur to determine the amount of stock-based compensation cost to be recognized in each period. As such, the guidance relating to forfeitures did not have an impact on our accumulated deficit as of January 1, 2016. • We elected to apply the statement of cash flows guidance that cash flows related to excess tax benefits be presented as an operating activity retrospectively, which resulted in a $1.2 million increase to net cash provided by operating activities and a corresponding decrease to net cash provided by financing activities in the accompanying condensed consolidated statement of cash flows for the nine months ended September 30, 2015 , as compared to the amounts previously reported. • The statement of cash flows guidance that cash flows related to employee taxes paid for withheld shares be presented as a financing activity had no impact on our condensed consolidated financial statements as we have historically presented such cash flows as a financing activity. In September 2015, the FASB issued ASU 2015-16, “Simplifying the Accounting for Measurement-Period Adjustments (Topic 805),” which eliminates the requirement to restate prior period financial statements for measurement period adjustments in business combinations. This new standard requires that the cumulative impact of a measurement period adjustment (including the impact on prior periods) be recognized in the reporting period in which the adjustment is identified. We adopted this standard during the three months ended March 31, 2016 on a prospective basis and the adoption had no material impact on our condensed consolidated financial statements. In April 2015, the FASB issued ASU 2015-05, "Intangibles—Goodwill and Other—Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement." ASU 2015-05 provides guidance to customers about whether a cloud computing arrangement includes software. If a cloud computing arrangement includes a software license, the customer should account for the software license element of the arrangement consistent with the acquisition of other software licenses. If a cloud computing arrangement does not include a software license, the customer should account for the arrangement as a service contract. We adopted this standard during the three months ended March 31, 2016 on a prospective basis and the adoption had no material impact on our condensed consolidated financial statements. Pending Accounting Pronouncements In October 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-16, "Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory," which includes a revision of the accounting for the income tax consequences of intra-entity transfers of assets other than inventory to reduce the complexity in accounting standards. This standard is effective for our interim and annual reporting periods beginning after December 15, 2017, and early adoption is permitted. We are currently evaluating the impact of this standard on our condensed consolidated financial statements. In August 2016, the FASB issued ASU 2016-15, "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments," which provides guidance on eight specific cash flow issues. Among these issues, this standard requires, at the settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowings, the portion of the cash payment attributable to the accreted interest related to the debt discount to be classified as cash flows for operating activities, and the portion of the cash payments attributable to the principal to be classified as cash outflows for financing activities. This standard is effective for our interim and annual reporting periods beginning after December 15, 2017, and early adoption is permitted. We are currently evaluating the impact of this standard on our condensed consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, "Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments," which requires a financial asset measured at amortized cost basis to be presented at the net amount expected to be collected. Credit losses relating to available-for-sale debt securities should be recorded through an allowance for credit losses. This standard is effective for our interim and annual reporting periods beginning after December 15, 2019. We are currently evaluating the impact of this standard on our condensed consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, "Leases (Topic 842)," which requires lessees to generally recognize on the balance sheet operating and financing lease liabilities and corresponding right-of-use assets, and to recognize on the income statement the expenses in a manner similar to current practice. This new standard is effective for our interim and annual periods beginning January 1, 2019 and early adoption is permitted. While we are currently evaluating the impact of this standard on our condensed consolidated financial statements, we anticipate this standard will have a material impact on our condensed consolidated balance sheets given that we have operating lease commitments of approximately $300 million as of September 30, 2016 . However, we do not anticipate this standard will have a material impact on our condensed consolidated statements of comprehensive loss since the expense recognition under this new standard will be similar to current practice. In January 2016, the FASB issued ASU 2016-01, "Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities," which addresses certain aspects of recognition, measurement, presentation, and disclosure of financial instruments. This new standard is effective for our interim and annual periods beginning January 1, 2018 and early adoption is not permitted. We are currently evaluating the impact of this standard on our condensed consolidated financial statements.
Legal Proceedings	Legal Proceedings

Investments (Tables)

Investments (Tables)	9 Months Ended
	Sep. 30, 2016
Available-for-sale Securities [Abstract]
Summary of Investments	The following is a summary of our available-for-sale investment securities, excluding those securities classified within cash and cash equivalents on the consolidated balance sheets (in thousands): September 30, 2016 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Available-for-sale securities: Commercial paper $ 61,726 $ — $ — $ 61,726 Corporate notes and bonds 629,143 513 (553 ) 629,103 Certificates of deposit 33,417 — — 33,417 U.S. government agency securities 38,908 26 (14 ) 38,920 Total available-for-sale securities $ 763,194 $ 539 $ (567 ) $ 763,166 December 31, 2015 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Available-for-sale securities: Commercial paper $ 32,430 $ 2 $ (38 ) $ 32,394 Corporate notes and bonds 617,054 7 (2,027 ) 615,034 Certificates of deposit 29,610 2 (17 ) 29,595 U.S. government agency securities 134,962 1 (374 ) 134,589 Total available-for-sale securities $ 814,056 $ 12 $ (2,456 ) $ 811,612
Investments Classified by Contractual Maturity Date	The fair values of available-for-sale investments, by remaining contractual maturity, are as follows (in thousands): September 30, 2016 Due in 1 year or less $ 481,813 Due in 1 year through 2 years 281,353 Total $ 763,166
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 securities, classified by the length of time that the securities have been in a continuous unrealized loss position, and aggregated by investment types (in thousands): September 30, 2016 Less than 12 Months 12 Months or Greater Total Fair Value Gross Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Corporate notes and bonds $ 367,093 $ (553 ) $ 600 $ — $ 367,693 $ (553 ) U.S. government agency securities 21,401 (14 ) — — 21,401 (14 ) Total $ 388,494 $ (567 ) $ 600 $ — $ 389,094 $ (567 ) December 31, 2015 Less than 12 Months 12 Months or Greater Total Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Fair Value Gross Unrealized Losses Commercial paper $ 24,913 $ (38 ) $ — $ — $ 24,913 $ (38 ) Corporate notes and bonds 539,586 (1,897 ) 60,099 (130 ) 599,685 (2,027 ) Certificates of deposit 19,750 (17 ) — — 19,750 (17 ) U.S. government agency securities 132,581 (374 ) — — 132,581 (374 ) Total $ 716,830 $ (2,326 ) $ 60,099 $ (130 ) $ 776,929 $ (2,456 )

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2016
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 measured at fair value on a recurring basis at September 30, 2016 (in thousands): Level 1 Level 2 Total Cash equivalents: Money market funds $ 114,850 $ — $ 114,850 Short-term investments: Commercial paper — 61,726 61,726 Corporate notes and bonds — 376,862 376,862 Certificates of deposit — 32,712 32,712 U.S. government agency securities — 10,513 10,513 Long-term investments: Corporate notes and bonds — 252,240 252,240 Certificates of deposit — 705 705 U.S. government agency securities — 28,408 28,408 Total $ 114,850 $ 763,166 $ 878,016 The following table presents our fair value hierarchy for our assets measured at fair value on a recurring basis at December 31, 2015 (in thousands): Level 1 Level 2 Total Cash equivalents: Money market funds $ 263,515 $ — $ 263,515 Commercial paper — 2,000 2,000 Corporate notes and bonds — 1,119 1,119 Short-term investments: Commercial paper — 32,394 32,394 Corporate notes and bonds — 303,567 303,567 Certificates of deposit — 23,736 23,736 U.S. government agency securities — 29,248 29,248 Long-term investments: Corporate notes and bonds — 311,467 311,467 Certificates of deposit — 5,859 5,859 U.S. government agency securities — 105,341 105,341 Total $ 263,515 $ 814,731 $ 1,078,246

Business Combinations (Tables)

Business Combinations (Tables)	9 Months Ended
	Sep. 30, 2016
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition	The following table summarizes the allocation of the purchase price to the fair value of the tangible and intangible assets acquired and liabilities assumed as of the acquisition date: Purchase Price Allocation (in thousands) Useful Life (in years) Net tangible assets acquired $ 140 Intangible assets: Developed technology 4,700 5 Customer contracts and related relationships 200 1.5 Goodwill 11,437 Net deferred tax liabilities (2,015 ) Total purchase price $ 14,462 Purchase Price Allocation (in thousands) Useful Life (in years) Intangible assets: Developed technology $ 8,100 6 Customer contracts and related relationships 500 1.5 Goodwill 15,258 Net tangible liabilities acquired (1,339 ) Net deferred tax liabilities (1) (2,890 ) Total purchase price $ 19,629 (1)

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	Goodwill balances are presented below (in thousands): Carrying Amount Balance as of December 31, 2015 $ 55,669 Goodwill acquired 26,695 Foreign currency translation adjustments 2,061 Balance as of September 30, 2016 $ 84,425
Schedule of Intangible Assets	Intangible assets consist of the following (in thousands): September 30, 2016 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 80,453 $ (27,580 ) $ 52,873 Other 9,275 (1,422 ) 7,853 Total intangible assets $ 89,728 $ (29,002 ) $ 60,726 December 31, 2015 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Developed technology $ 58,144 $ (17,463 ) $ 40,681 Other 3,695 (1,371 ) 2,324 Total intangible assets $ 61,839 $ (18,834 ) $ 43,005

Property and Equipment (Tables)

Property and Equipment (Tables)	9 Months Ended
	Sep. 30, 2016
Property, Plant and Equipment [Abstract]
Summary of Property and Equipment, Net	Property and equipment, net consists of the following (in thousands): September 30, December 31, 2016 2015 Computer equipment and software $ 238,661 $ 180,197 Leasehold improvements 35,418 31,659 Furniture and fixtures 29,981 26,017 Building 6,570 6,318 Construction in progress 5,088 1,886 315,718 246,077 Less: Accumulated depreciation (139,612 ) (101,363 ) Total property and equipment, net $ 176,106 $ 144,714

Accrued Expenses and Other Cu28

Accrued Expenses and Other Current Liabilities (Tables)	9 Months Ended
	Sep. 30, 2016
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): September 30, December 31, 2016 2015 Taxes payable $ 11,452 $ 9,080 Bonuses and commissions 46,253 33,124 Accrued compensation 25,724 17,089 Other employee related liabilities 18,602 21,529 Other 22,639 20,442 Total accrued expenses and other current liabilities $ 124,670 $ 101,264

Convertible Senior Notes (Table

Convertible Senior Notes (Tables)	9 Months Ended
	Sep. 30, 2016
Convertible Notes Payable [Abstract]
Schedule of Convertible Notes	The Notes consisted of the following (in thousands): September 30, 2016 December 31, 2015 Liability: Principal $ 575,000 $ 575,000 Less: debt issuance cost and debt discount, net of amortization (75,720 ) (100,466 ) Net carrying amount $ 499,280 $ 474,534
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 September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Amortization of debt issuance cost $ 450 $ 420 $ 1,327 $ 1,240 Amortization of debt discount 7,939 7,419 23,419 21,884 Total $ 8,389 $ 7,839 $ 24,746 $ 23,124 Effective interest rate of the liability component 6.5%

Accumulated Other Comprehensi30

Accumulated Other Comprehensive Loss (Tables)	9 Months Ended
	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Schedule of Accumulated Other Comprehensive Income (Loss)	The components of accumulated other comprehensive loss, net of tax, consist of the following (in thousands): September 30, December 31, 2016 2015 Foreign currency translation adjustment $ (15,544 ) $ (14,438 ) Net unrealized loss on investments, net of tax (921 ) (2,444 ) Accumulated other comprehensive loss $ (16,465 ) $ (16,882 )

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2016
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 September 30, 2016 , we had 166,011,100 shares of common stock outstanding and had reserved shares of common stock for future issuance as follows: September 30, 2016 Stock option plans: Options outstanding 6,475,548 RSUs 12,834,324 Stock awards available for future grants: 2012 Equity Incentive Plan (1) 21,051,913 2012 Employee Stock Purchase Plan (1) 8,566,803 Total reserved shares of common stock for future issuance 48,928,588 (1) Refer to Note 12 for a description of these plans.

Stock Awards (Tables)

Stock Awards (Tables)	9 Months Ended
	Sep. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Schedule of Stock Option Activity	A summary of the stock option activity for the nine months ended September 30, 2016 is as follows: Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (Years) Aggregate Intrinsic Value (in thousands) Outstanding at December 31, 2015 8,255,554 $ 16.65 Granted 169,400 65.92 Exercised (579,504 ) 5.28 $ 35,876 Canceled (126,735 ) 58.05 Outstanding at March 31, 2016 7,718,715 17.90 Granted 131,835 68.36 Exercised (828,327 ) 17.18 $ 43,757 Canceled (119,321 ) 52.26 Outstanding at June 30, 2016 6,902,902 18.36 Granted 232,750 74.47 Exercised (477,802 ) 15.69 $ 28,345 Canceled (182,302 ) 58.41 Outstanding at September 30, 2016 6,475,548 $ 19.44 5.54 $ 386,791 Vested and expected to vest as of September 30, 2016 6,370,923 $ 18.62 5.48 $ 385,785 Vested and exercisable as of September 30, 2016 5,548,381 $ 11.91 5.01 $ 373,084
Schedule of Restricted Stock Unit Activity	A summary of RSU activity for the nine months ended September 30, 2016 is as follows: Number of Shares Weighted Average Grant Date Fair Value (Per Share) Aggregate Intrinsic Value (in thousands) Outstanding at December 31, 2015 12,417,805 $ 63.38 Granted 3,822,832 51.11 Vested (1,708,179 ) 58.42 $ 89,516 Forfeited (370,545 ) 64.43 Outstanding at March 31, 2016 14,161,913 60.64 Granted 805,680 67.75 Vested (1,285,704 ) 53.70 $ 86,693 Forfeited (407,451 ) 63.31 Outstanding at June 30, 2016 13,274,438 61.66 Granted 1,423,601 74.62 Vested (1,132,142 ) 63.56 $ 85,816 Forfeited (731,573 ) 61.29 Non-vested and outstanding at September 30, 2016 12,834,324 $ 62.95 $ 1,015,837 Expected to vest as of September 30, 2016 10,843,628 $ 858,273

Net Loss Per Share (Tables)

Net Loss Per Share (Tables)	9 Months Ended
	Sep. 30, 2016
Earnings Per Share [Abstract]
Calculation of Basic and Diluted Net Loss Per Share Attributable to Common Stockholders	The following table presents the calculation of basic and diluted net loss per share (in thousands, except share and per share data): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Numerator: Net loss $ (36,258 ) $ (41,030 ) $ (419,215 ) $ (161,048 ) Denominator: Weighted-average shares outstanding—basic and diluted 165,378,836 156,930,506 163,767,329 154,352,037 Net loss per share—basic and diluted: $ (0.22 ) $ (0.26 ) $ (2.56 ) $ (1.04 )
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: September 30, 2016 2015 Common stock options 6,475,548 10,235,318 Restricted stock units 12,834,324 12,716,479 ESPP obligations 360,536 270,426 Convertible senior notes 7,783,023 7,783,023 Warrants related to the issuance of convertible senior notes 7,783,023 7,783,023 Total potentially dilutive securities 35,236,454 38,788,269

Information about Geographic 34

Information about Geographic Areas and Products (Tables)	9 Months Ended
	Sep. 30, 2016
Segments, Geographical Areas [Abstract]
Revenues by Geographic Area, Based on Billing Location of Customer	Revenues by geographic area, based on the location of our users, were as follows for the periods presented (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 North America (1) $ 239,585 $ 181,293 $ 684,111 $ 504,326 EMEA (2) 90,399 61,663 246,745 165,996 Asia Pacific and other 27,672 18,194 73,991 49,508 Total revenues $ 357,656 $ 261,150 $ 1,004,847 $ 719,830
Schedule of Property and Equipment, Net by Geographic Area	Property and equipment, net by geographic area were as follows (in thousands): September 30, December 31, 2016 2015 North America (3) $ 128,649 $ 104,085 EMEA (2) 35,618 32,027 Asia Pacific and other 11,839 8,602 Total property and equipment, net $ 176,106 $ 144,714 (1) Revenues attributed to the United States were approximately 95% of North America revenues for each of the three months ended September 30, 2016 and 2015 and nine months ended September 30, 2016 and 2015 . (2) Europe, the Middle East and Africa (3) Property and equipment, net attributed to the United States were approximately 92% and 98% of property and equipment, net attributable to North America as of September 30, 2016 and December 31, 2015
Schedule Of Subscription Revenue By Product	Subscription revenues consist of the following (in thousands): Three Months Ended September 30, Nine Months Ended September 30, 2016 2015 2016 2015 Enterprise Service Management solutions $ 290,005 $ 205,795 $ 800,534 $ 559,080 IT Operations Management solutions 28,929 17,413 76,501 44,496 Total subscription revenues $ 318,934 $ 223,208 $ 877,035 $ 603,576

Summary of Significant Accoun35

Summary of Significant Accounting Policies New Accounting Pronouncements (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2016	Sep. 30, 2015
New Accounting Pronouncement, Early Adoption [Line Items]
Effective income tax rate reconciliation, share-based compensation, excess tax benefit	$ 0.3	$ 2
Operating leases, future minimum payments due	300	300
New Accounting Pronouncement, Early Adoption, Effect [Member]
New Accounting Pronouncement, Early Adoption [Line Items]
Cumulative effect of change on equity	$ 11.4	$ 11.4
Net cash provided by operating activities(1)			$ 1.2
Net cash (used in) provided by financing activities(1)			$ (1.2)

Investments - Summary of Invest

Investments - Summary of Investments (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	$ 763,194	$ 814,056
Available-for-sale securities, accumulated gross unrealized gain, before tax	539	12
Available-for-sale securities, accumulated gross unrealized loss, before tax	(567)	(2,456)
Estimated fair value	763,166	811,612
Short-term investments	481,813	388,945
Long-term investments	281,353	422,667
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	61,726	32,430
Available-for-sale securities, accumulated gross unrealized gain, before tax	0	2
Available-for-sale securities, accumulated gross unrealized loss, before tax	0	(38)
Estimated fair value	61,726	32,394
Corporate notes and bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	629,143	617,054
Available-for-sale securities, accumulated gross unrealized gain, before tax	513	7
Available-for-sale securities, accumulated gross unrealized loss, before tax	(553)	(2,027)
Estimated fair value	629,103	615,034
Certificates of deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	33,417	29,610
Available-for-sale securities, accumulated gross unrealized gain, before tax	0	2
Available-for-sale securities, accumulated gross unrealized loss, before tax	0	(17)
Estimated fair value	33,417	29,595
US government agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized cost	38,908	134,962
Available-for-sale securities, accumulated gross unrealized gain, before tax	26	1
Available-for-sale securities, accumulated gross unrealized loss, before tax	(14)	(374)
Estimated fair value	$ 38,920	$ 134,589

Investments - Fair Values and G

Investments - Fair Values and Gross Unrealized Losses of Available-for-Sale Securities Aggregated by Investment Category (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	$ 388,494	$ 716,830
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss	(567)	(2,326)
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	600	60,099
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss	0	(130)
Fair value	389,094	776,929
Available-for-sale securities, continuous unrealized loss position, accumulated loss	(567)	(2,456)
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value		24,913
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss		(38)
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value		0
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss		0
Fair value		24,913
Available-for-sale securities, continuous unrealized loss position, accumulated loss		(38)
Corporate notes and bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	367,093	539,586
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss	(553)	(1,897)
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	600	60,099
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss	0	(130)
Fair value	367,693	599,685
Available-for-sale securities, continuous unrealized loss position, accumulated loss	(553)	(2,027)
Certificates of deposit [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value		19,750
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss		(17)
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value		0
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss		0
Fair value		19,750
Available-for-sale securities, continuous unrealized loss position, accumulated loss		(17)
US government agency securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale securities, continuous unrealized loss position, less than twelve months, fair value	21,401	132,581
Available-for-sale securities, continuous unrealized loss position, less than 12 months, accumulated loss	(14)	(374)
Available-for-sale securities, continuous unrealized loss position, twelve months or longer, fair value	0	0
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss	0	0
Fair value	21,401	132,581
Available-for-sale securities, continuous unrealized loss position, accumulated loss	$ (14)	$ (374)

Investments - Additional Inform

Investments - Additional Information (Detail) - USD ($)	9 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Available-for-sale Securities [Abstract]
Available for sale securities maturities term maximum	24 months
Available for sale, gross unrealized term held	12 months
Other than temporary impairment losses, investments, available-for-sale securities	$ 0
Cost method investments	$ 10,500,000	$ 10,500,000

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 763,166	$ 811,612
Total	878,016	1,078,246
Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	61,726	32,394
Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	629,103	615,034
Certificates of deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	33,417	29,595
US government agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	38,920	134,589
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	114,850	263,515
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total	763,166	814,731
Cash Equivalents [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	114,850	263,515
Cash Equivalents [Member] | Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		2,000
Cash Equivalents [Member] | Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		1,119
Cash Equivalents [Member] | Level 1 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	114,850	263,515
Cash Equivalents [Member] | Level 1 [Member] | Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		0
Cash Equivalents [Member] | Level 1 [Member] | Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		0
Cash Equivalents [Member] | Level 2 [Member] | Money Market Funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Cash Equivalents [Member] | Level 2 [Member] | Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		2,000
Cash Equivalents [Member] | Level 2 [Member] | Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents		1,119
Short-term Investments [Member] | Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	61,726	32,394
Short-term Investments [Member] | Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	376,862	303,567
Short-term Investments [Member] | Certificates of deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	32,712	23,736
Short-term Investments [Member] | US government agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	10,513	29,248
Short-term Investments [Member] | Level 1 [Member] | Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Short-term Investments [Member] | Level 1 [Member] | Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Short-term Investments [Member] | Level 1 [Member] | Certificates of deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Short-term Investments [Member] | Level 1 [Member] | US government agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Short-term Investments [Member] | Level 2 [Member] | Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	61,726	32,394
Short-term Investments [Member] | Level 2 [Member] | Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	376,862	303,567
Short-term Investments [Member] | Level 2 [Member] | Certificates of deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	32,712	23,736
Short-term Investments [Member] | Level 2 [Member] | US government agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	10,513	29,248
Other Long-term Investments [Member] | Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	252,240	311,467
Other Long-term Investments [Member] | Certificates of deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	705	5,859
Other Long-term Investments [Member] | US government agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	28,408	105,341
Other Long-term Investments [Member] | Level 1 [Member] | Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Other Long-term Investments [Member] | Level 1 [Member] | Certificates of deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Other Long-term Investments [Member] | Level 1 [Member] | US government agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	0	0
Other Long-term Investments [Member] | Level 2 [Member] | Corporate notes and bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	252,240	311,467
Other Long-term Investments [Member] | Level 2 [Member] | Certificates of deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	705	5,859
Other Long-term Investments [Member] | Level 2 [Member] | US government agency securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term investments	$ 28,408	$ 105,341

Business Combinations BrightPoi

Business Combinations BrightPoint Security (Details) - USD ($) $ in Thousands		Jun. 03, 2016	Sep. 30, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill			$ 84,425	$ 55,669
BrightPoint Security [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred		$ 19,629
Goodwill		15,258
Net tangible liabilities acquired		(1,339)
Net deferred tax liabilities(1)	[1]	(2,890)
Developed technology [Member] | BrightPoint Security [Member]
Business Acquisition [Line Items]
Finite-lived intangibles		$ 8,100
Finite-lived intangible asset, useful life		6 years
Customer contracts and related relationships [Member] | BrightPoint Security [Member]
Business Acquisition [Line Items]
Finite-lived intangibles		$ 500
Finite-lived intangible asset, useful life		1 year 6 months
[1]	(1)Deferred tax liabilities, net primarily relates to purchased identifiable intangible assets and is shown net of deferred tax assets.

Business Combinations ITapp (De

Business Combinations ITapp (Details) - USD ($) $ in Thousands	Apr. 08, 2016	Sep. 30, 2016	Dec. 31, 2015
Business Acquisition [Line Items]
Goodwill		$ 84,425	$ 55,669
General and Administrative Expense
Business Acquisition [Line Items]
Business acquisition, transaction costs		$ 1,000
ITapp [Member]
Business Acquisition [Line Items]
Net tangible assets acquired	$ 140
Goodwill	11,437
Net deferred tax liabilities(1)	(2,015)
Business combination, consideration transferred	14,462
Developed technology [Member] | ITapp [Member]
Business Acquisition [Line Items]
Finite-lived intangibles	$ 4,700
Finite-lived intangible asset, useful life	5 years
Customer contracts and related relationships [Member] | ITapp [Member]
Business Acquisition [Line Items]
Finite-lived intangibles	$ 200
Finite-lived intangible asset, useful life	1 year 6 months

Goodwill and Intangible Asset42

Goodwill and Intangible Assets - Schedule of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016USD ($)
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 55,669
Goodwill acquired	26,695
Foreign currency translation adjustments	2,061
Goodwill, end of period	$ 84,425

Goodwill and Intangible Asset43

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 89,728		$ 89,728		$ 61,839
Accumulated Amortization	(29,002)		(29,002)		(18,834)
Net Carrying Amount	60,726		60,726		43,005
Amortization expense	4,300	$ 2,900	10,900	$ 8,800
Developed technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	80,453		80,453		58,144
Accumulated Amortization	(27,580)		(27,580)		(17,463)
Net Carrying Amount	52,873		52,873		40,681
Other acquisition-related intangible assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,275		9,275		3,695
Accumulated Amortization	(1,422)		(1,422)		(1,371)
Net Carrying Amount	$ 7,853		$ 7,853		$ 2,324

Property and Equipment (Detail)

Property and Equipment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 315,718		$ 315,718		$ 246,077
Less: accumulated depreciation	(139,612)		(139,612)		(101,363)
Total property and equipment, net	176,106		176,106		144,714
Depreciation	17,900	$ 12,200	48,700	$ 35,100
Computer Equipment And Software [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	238,661		238,661		180,197
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	35,418		35,418		31,659
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	29,981		29,981		26,017
Building [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	6,570		6,570		6,318
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 5,088		$ 5,088		$ 1,886

Accrued Expenses and Other Cu45

Accrued Expenses and Other Current Liabilities - (Detail) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Disclosure Summary Of Accrued Expenses And Other Current Liabilities [Abstract]
Taxes payable	$ 11,452	$ 9,080
Bonuses and commissions	46,253	33,124
Accrued compensation	25,724	17,089
Other employee related liabilities	18,602	21,529
Other	22,639	20,442
Total accrued expenses and other current liabilities	$ 124,670	$ 101,264

Convertible Senior Notes (Detai

Convertible Senior Notes (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Nov. 30, 2013USD ($)shares$ / shares	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Sep. 30, 2016USD ($)	Sep. 30, 2015USD ($)	Dec. 31, 2015USD ($)
Debt Conversion [Line Items]
Convertible debt, fair value disclosures		$ 701,800,000		$ 701,800,000		$ 741,800,000
Amortization of debt discount		7,939,000	$ 7,419,000	23,419,000	$ 21,884,000
Notes face amount	$ 1,000
Contractual interest rate - Notes	0.00%
Principal	$ 575,000,000	575,000,000		$ 575,000,000		$ 575,000,000
Converted number of shares | shares	7,800,000
Conversion rate	13.54
Initial conversion price, per share, (in USD per share) | $ / shares	$ 73.88
Terms of conversion feature				July 1, 2018
Percentage of purchase price of Notes which should be paid upon fundamental change	100.00%
Remaining life of the Notes				25 months
Amortization of debt discount and issuance costs		$ 8,389,000	$ 7,839,000	$ 24,746,000	$ 23,124,000
Noted hedged shares of common stock covered | shares	7,800,000
Purchase of convertible note hedge	$ 135,800,000
Issuance of warrants (in shares) | shares	7,800,000
Exercise price of warrants issued (USD per share) | $ / shares	$ 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 years
Number of consecutive trading days in a period	5 years
Notes face amount	$ 1,000
Measurement Period [Member] | Maximum [Member]
Debt Conversion [Line Items]
Threshold percentage of stock price trigger	98.00%

Convertible Senior Notes - Sche

Convertible Senior Notes - Schedule of Notes Payable (Details) - USD ($)	Sep. 30, 2016	Dec. 31, 2015	Nov. 30, 2013
Convertible Notes Payable [Abstract]
Principal	$ 575,000,000	$ 575,000,000	$ 575,000,000
Less: debt issuance cost and debt discount, net of amortization	(75,720,000)	(100,466,000)
Net carrying amount	$ 499,280,000	$ 474,534,000

Convertible Senior Notes - Sc48

Convertible Senior Notes - Schedule of Interest Expense Recognized (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Convertible Notes Payable [Abstract]
Amortization of debt issuance cost	$ 450	$ 420	$ 1,327	$ 1,240
Amortization of debt discount	7,939	7,419	23,419	21,884
Amortization of debt discount and issuance costs	$ 8,389	$ 7,839	$ 24,746	$ 23,124
Interest rate, effective percentage	6.50%	6.50%	6.50%	6.50%

Accumulated Other Comprehensi49

Accumulated Other Comprehensive Loss - (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustment	$ (15,544)	$ (14,438)
Net unrealized loss on investments, net of tax	(921)	(2,444)
Accumulated other comprehensive loss	$ (16,465)	$ (16,882)

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Stockholders' Equity Note [Abstract]
Shares of common stock, authorized (shares)	600,000,000
Shares of common stock, issued and sold (shares)	166,011,100
Stock issued during period, shares, new issues	5,225,336	8,586,233

Stockholders' Equity - Outstand

Stockholders' Equity - Outstanding and Reserved Shares of Common Stock for Future Issuance (Detail) - shares		Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015
Common stock outstanding and reserved shares of common stock for future issuance
Options outstanding (in shares)		6,475,548	6,902,902	7,718,715	8,255,554
Total reserved shares of common stock for future issuance		48,928,588
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	[1]	21,051,913
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	[1]	8,566,803
Stock Options [Member]
Common stock outstanding and reserved shares of common stock for future issuance
Options outstanding (in shares)		6,475,548
Restricted Stock Units (RSUs) [Member]
Common stock outstanding and reserved shares of common stock for future issuance
RSUs (in shares)		12,834,324	13,274,438	14,161,913	12,417,805
[1]	Refer to Note 12 for a description of these plans.

Stock Awards - Additional Infor

Stock Awards - Additional Information (Detail) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted-average grant date fair value of options granted (usd per share) | $ / shares	$ 27.90
Fair value of stock options vested	$ 14.2
Total unrecognized compensation cost, adjusted for estimated forfeitures, related to unvested stock options	$ 20.7
Remaining weighted-average period (in years)	2 years 9 months 29 days
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation expense expected to be recognized	$ 603.8
Remaining weighted-average period (in years)	2 years 10 months 2 days
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%
Number of additional shares authorized | shares	8,039,288
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%
Number of additional shares authorized | shares	1,607,858
Common stock purchase price percentage	85.00%
Award offering period (in months)	6 months
2005 Restricted Stock Plan [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense recognized, vesting term (in years)	4 years

Stock Awards - Summary of Stock

Stock Awards - Summary of Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2016
Summary of stock option activity
Number of Shares, Outstanding, Beginning Balance	6,902,902	7,718,715	8,255,554	8,255,554
Number of Shares, Granted	232,750	131,835	169,400
Number of Shares, Exercised	(477,802)	(828,327)	(579,504)
Number of shares, Cancelled	(182,302)	(119,321)	(126,735)
Number of Shares, Outstanding, Ending Balance	6,475,548	6,902,902	7,718,715	6,475,548
Number of Shares, Vested and expected to vest	6,370,923			6,370,923
Number of Shares, Vested and exercisable	5,548,381			5,548,381
Weighted-Average Exercise Price
Weighted-Average Exercise Price, Outstanding, Beginning Balance, usd per share	$ 18.36	$ 17.90	$ 16.65	$ 16.65
Weighted-Average Exercise Price, Granted, usd per share	74.47	68.36	65.92
Weighted-Average Exercise Price, Exercised, usd per share	15.69	17.18	5.28
Weighted-Average Exercise Price Cancelled, usd per share	58.41	52.26	58.05
Weighted-Average Exercise Price, Outstanding, Ending Balance, usd per share	19.44	$ 18.36	$ 17.90	19.44
Weighted-Average Exercise Price, Vested and expected to vest, usd per share	18.62			18.62
Weighted-Average Exercise Price, Vested and exercisable, usd per share	$ 11.91			$ 11.91
Weighted-Average Remaining Contractual Life (in years)				5 years 6 months 14 days
Weighted-Average Remaining Contractual Term, Vested and expected to vest (in years)				5 years 5 months 23 days
Weighted-Average Remaining Contractual Term, Vested and exercisable (in years)				5 years 3 days
Aggregate Intrinsic Value, Exercised	$ 28,345	$ 43,757	$ 35,876
Aggregate Intrinsic Value, Outstanding	386,791			$ 386,791
Aggregate Intrinsic Value, Vested and expected to vest	385,785			385,785
Aggregate Intrinsic Value, Vested and exercisable	$ 373,084			$ 373,084

Stock Awards Stock Awards - Res

Stock Awards Stock Awards - Restricted Stock Unit Table (Details) - Restricted Stock Units (RSUs) [Member] - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Sep. 30, 2016	Dec. 31, 2015
Shares Outstanding
Number of shares, granted	1,423,601	805,680	3,822,832
Number of shares, vested	(1,132,142)	(1,285,704)	(1,708,179)
Number of shares, forfeited	(731,573)	(407,451)	(370,545)
Number of shares, non-vested and outstanding	12,834,324	13,274,438	14,161,913	12,834,324	12,417,805
Number of shares, expected to vest	10,843,628			10,843,628
Weighted-Average Grant Date Fair Value
Weighted-average grant date fair value, outstanding, beginning balance, usd per share	$ 61.66	$ 60.64	$ 63.38	$ 63.38
Weighted average grant date fair value, granted, usd per share	74.62	67.75	51.11
Weighted-average grant date fair value, vested, usd per share	63.56	53.70	58.42
Weighted-average grant date fair value, forfeited, usd per share	61.29	63.31	64.43
Weighted-average grant date fair value, outstanding, ending balance, usd per share	$ 62.95	$ 61.66	$ 60.64	$ 62.95
Aggregate intrinsic value, vested	$ 85,816	$ 86,693	$ 89,516
Aggregate intrinsic value, non-vested	1,015,837			$ 1,015,837
Aggregate intrinsic value, expected to vest	$ 858,273			$ 858,273
2005 Restricted Stock Plan [Member]
Class of Stock [Line Items]
Compensation expense recognized, vesting term (in years)				4 years
2012 Restricted Stock Plan [Member]
Class of Stock [Line Items]
Compensation expense recognized, vesting term (in years)				4 years

Net Loss Per Share - Calculatio

Net Loss Per Share - Calculation of Basic and Diluted Net Income (Loss) Per Share Attributable to Common Stockholders (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Numerator:
Net loss	$ (36,258)	$ (41,030)	$ (419,215)	$ (161,048)
Denominator:
Weighted-average shares used to compute net loss per share - basic and diluted	165,378,836	156,930,506	163,767,329	154,352,037
Net loss per share attributable to common stockholders:
Net loss per share, basic and diluted (in USD per share)	$ (0.22)	$ (0.26)	$ (2.56)	$ (1.04)

Net Loss Per Share- Summary of

Net Loss Per Share- Summary of Potentially Dilutive Securities (Detail) - shares	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	35,236,454	38,788,269
Common stock options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	6,475,548	10,235,318
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	12,834,324	12,716,479
ESPP obligations [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	360,536	270,426
Convertible senior notes [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	7,783,023	7,783,023
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Total potentially dilutive securities	7,783,023	7,783,023

Income Taxes (Details)

Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Tax Disclosure [Abstract]
Effective income tax rate	(9.00%)	(3.00%)	0.00%	(2.00%)
Federal statutory rate	34.00%	34.00%	34.00%	34.00%

Commitments and Contingencies -

Commitments and Contingencies - (Details) $ in Millions	9 Months Ended
	Sep. 30, 2016USD ($)
Commitments and Contingencies Disclosure [Abstract]
Legal settlements	$ 270
Payments for legal settlements	$ 267.5

Information about Geographic 59

Information about Geographic Areas and Products - Revenues by Geographic Area, Based on Billing Location of Customer (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues by geography
Revenues		$ 357,656	$ 261,150	$ 1,004,847	$ 719,830
Percentage of U.S. Revenues in North America		95.00%	95.00%	95.00%	95.00%
North America [Member]
Revenues by geography
Revenues	[1]	$ 239,585	$ 181,293	$ 684,111	$ 504,326
EMEA [Member]
Revenues by geography
Revenues	[2]	90,399	61,663	246,745	165,996
Asia Pacific and other [Member]
Revenues by geography
Revenues		$ 27,672	$ 18,194	$ 73,991	$ 49,508
[1]	Revenues attributed to the United States were approximately 95% of North America revenues for each of the three months ended September 30, 2016 and 2015 and nine months ended September 30, 2016 and 2015.
[2]	Europe, the Middle East and Africa

Information about Geographic 60

Information about Geographic Areas and Products - Property and Equipment, Net (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Segment Reporting Information [Line Items]
Property and equipment, net		$ 176,106	$ 144,714
Percentage of U.S. net property and equipment in North America		92.00%	98.00%
North America [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	[1]	$ 128,649	$ 104,085
EMEA [Member]
Segment Reporting Information [Line Items]
Property and equipment, net	[2]	35,618	32,027
Asia Pacific and other [Member]
Segment Reporting Information [Line Items]
Property and equipment, net		$ 11,839	$ 8,602
[1]	Property and equipment, net attributed to the United States were approximately 92% and 98% of property and equipment, net attributable to North America as of September 30, 2016 and December 31, 2015, respectively.
[2]	Europe, the Middle East and Africa

Information about Geographic 61

Information about Geographic Areas and Products - Subscription Revenues (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Enterprise Service Management solutions	$ 290,005	$ 205,795	$ 800,534	$ 559,080
IT Operations Management solutions	28,929	17,413	76,501	44,496
Subscription	$ 318,934	$ 223,208	$ 877,035	$ 603,576