Mandiant (MNDT) 10-Q 1 May 20 2020 Q1 Quarterly report Financial data

Cover Page

Cover Page - shares	3 Months Ended
	Mar. 31, 2020	Apr. 28, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	001-36067
Entity Registrant Name	FireEye, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-1548921
Entity Address, Address Line One	601 McCarthy Blvd
Entity Address, City or Town	Milpitas
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95035
City Area Code	408
Local Phone Number	321-6300
Title of 12(b) Security	Common Stock, $0.0001 par value per share
Trading Symbol	FEYE
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		222,844,478
Entity Central Index Key	0001370880
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 283,866	$ 334,603
Short-term investments	696,104	704,955
Accounts receivable, net of allowance for doubtful accounts of $2,791 and $2,263 at March 31, 2020 and December 31, 2019, respectively	140,191	171,459
Inventories	7,158	5,892
Prepaid expenses and other current assets	98,324	96,827
Total current assets	1,225,643	1,313,736
Property and equipment, net	90,613	93,812
Operating lease right-of-use assets, net	58,045	58,758
Goodwill	1,213,454	1,205,292
Intangible assets, net	128,110	134,420
Deposits and other long-term assets	80,521	84,468
TOTAL ASSETS	2,796,386	2,890,486
CURRENT LIABILITIES:
Accounts payable	26,288	26,271
Operating lease liabilities, current	19,017	18,437
Accrued and other current liabilities	23,794	24,496
Accrued compensation	57,941	59,513
Convertible senior notes, current, net	118,805	117,288
Deferred revenue, current	572,533	603,944
Total current liabilities	818,378	849,949
Convertible senior notes, non-current, net	904,120	893,273
Deferred revenue, non-current	347,323	370,623
Operating lease liabilities, non-current	68,277	70,481
Other long-term liabilities	4,680	4,494
Total liabilities	2,142,778	2,188,820
Commitments and contingencies (NOTE 10)
Stockholders' equity:
Common stock, par value of $0.0001 per share; 1,000,000 shares authorized, 222,766 shares and 219,422 shares issued and outstanding as of March 31, 2020 and December 31, 2019, respectively	22	22
Additional paid-in capital	3,488,456	3,457,359
Treasury stock, at cost; 3,333 shares as of March 31, 2020 and December 31, 2019	(150,000)	(150,000)
Accumulated other comprehensive income (loss)	(1,669)	1,180
Accumulated deficit	(2,683,201)	(2,606,895)
Total stockholders’ equity	653,608	701,666
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 2,796,386	$ 2,890,486

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Allowance for doubtful accounts	$ 2,791	$ 2,263
Stockholders' equity:
Common stock, par value (usd per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized (shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (shares)	222,766,000	219,422,000
Common stock, shares outstanding (shares)	222,766,000	219,422,000
Treasury stock (shares)	3,333,000	3,333,000

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue:
Total revenue	$ 224,722	$ 210,544
Cost of revenue:
Total cost of revenue	81,586	71,568
Total gross profit	143,136	138,976
Operating expenses:
Research and development	67,503	67,395
Sales and marketing	100,200	103,896
General and administrative	27,429	27,376
Restructuring charges	10,974	3,799
Total operating expenses	206,106	202,466
Operating loss	(62,970)	(63,490)
Interest income	4,424	5,848
Interest expense	(15,846)	(15,263)
Other expense, net	(989)	(288)
Loss before income taxes	(75,381)	(73,193)
Provision for income taxes	925	2,182
Net loss	$ (76,306)	$ (75,375)
Net loss per share, basic and diluted (usd per share)	$ (0.35)	$ (0.38)
Weighted average shares used in computing net loss per share, basic and diluted (shares)	217,789	197,819
Product, subscription and support
Revenue:
Total revenue	$ 174,083	$ 169,903
Cost of revenue:
Total cost of revenue	53,136	48,468
Professional services
Revenue:
Total revenue	50,639	40,641
Cost of revenue:
Total cost of revenue	$ 28,450	$ 23,100

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Comprehensive Income [Abstract]
Net loss	$ (76,306)	$ (75,375)
Change in net unrealized gain (loss) on available-for-sale investments, net of tax	(2,849)	2,097
Comprehensive loss	$ (79,155)	$ (73,278)

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Stockholders' Equity Statement - USD ($) $ in Thousands	Total	Common Stock and Additional Paid-in-Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Accumulated Deficit
Beginning balance at Dec. 31, 2018	$ 650,394	$ 3,152,179	$ (150,000)	$ (2,299)	$ (2,349,486)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity awards, net of tax withholdings		843
Shares withheld for taxes		0
Stock-based compensation		41,482
Unrealized gain (loss) investments, net of tax				2,097
Net loss	(75,375)
Ending balance at Mar. 31, 2019	619,441	3,194,504	(150,000)	(202)	(2,424,861)
Beginning balance at Dec. 31, 2019	701,666	3,457,381	(150,000)	1,180	(2,606,895)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of common stock for equity awards, net of tax withholdings		1,348
Shares withheld for taxes		(7,399)
Stock-based compensation		37,148
Unrealized gain (loss) investments, net of tax				(2,849)
Net loss	(76,306)
Ending balance at Mar. 31, 2020	$ 653,608	$ 3,488,478	$ (150,000)	$ (1,669)	$ (2,683,201)

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (76,306)	$ (75,375)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	24,241	23,833
Stock-based compensation	36,178	40,323
Non-cash interest expense related to convertible senior notes	12,365	11,778
Deferred income taxes	143	475
Other	6,267	1,101
Changes in operating assets and liabilities, net of business acquisitions:
Accounts receivable	30,256	46,479
Inventories	(935)	(395)
Prepaid expenses and other assets	2,827	6,975
Accounts payable	1,717	6,802
Accrued liabilities	(1,319)	758
Accrued compensation	(1,572)	(7,611)
Deferred revenue	(54,711)	(28,639)
Other long-term liabilities	(3,607)	(2,051)
Net cash provided by (used in) operating activities	(24,456)	24,453
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment and demonstration units	(11,680)	(13,503)
Purchases of short-term investments	(103,131)	(156,533)
Proceeds from maturities of short-term investments	108,462	141,004
Purchase of investment in privately held company	(1,000)	0
Business acquisitions, net of cash acquired	(12,948)	0
Lease deposits	67
Lease deposits		(36)
Net cash used in investing activities	(20,230)	(29,068)
CASH FLOWS FROM FINANCING ACTIVITIES:
Payment related to shares withheld for taxes	(7,399)		$ 0
Proceeds from exercise of equity awards	1,348	843
Net cash provided by (used in) financing activities	(6,051)	843
Net change in cash and cash equivalents	(50,737)	(3,772)
Cash and cash equivalents, beginning of period	334,603	409,829
Cash and cash equivalents, end of period	283,866	406,057	$ 409,829
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION:
Cash paid for income taxes	727	1,399
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES:
Purchases of property and equipment and demonstration units in accounts payable and accrued liabilities	$ 3,215	$ 9,161

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Summary of Significant Accounting Policies	Description of Business and Summary of Significant Accounting Policies Description of Business FireEye, Inc., with principal executive offices located in Milpitas, California, was incorporated as NetForts, Inc. on February 18, 2004, under the laws of the State of Delaware, and changed its name to FireEye, Inc. on September 7, 2005. FireEye, Inc. and its wholly owned subsidiaries (collectively, the “Company”, “we”, “us” or “our”) provide comprehensive intelligence-based cybersecurity solutions that allow organizations to prepare for, prevent, investigate, respond to and remediate cyber attacks, including attacks that target on-premise, cloud and critical infrastructure environments. Our portfolio of cyber security products and services helps customers minimize the risk of costly cyber security breaches by: • validating the effectiveness of existing cybersecurity controls before an attack occurs, • detecting and preventing advanced, targeted and other evasive attacks missed by other security controls, • enabling more efficient management of security operations, including alert management, investigations and response when a breach occurs, and • providing assessment, training and other strategic security consulting services that help organizations improve their resilience to attack. Our portfolio of cybersecurity solutions includes threat detection and prevention products that include appliance-based, virtual and cloud solutions for web security, email security and endpoint security. These products are complemented by our cloud-based threat intelligence, security analytics and security automation and orchestration technologies, as well as our managed security services, cybersecurity consulting and incident response offerings. In combination, our solutions and services enable a proactive approach to cybersecurity that extends across the threat management lifecycle to minimize the risk of costly cybersecurity breaches. We have organized our cybersecurity solutions in a hub and spokes model designed to integrate machine-generated threat data from our detection and prevention products with our analytics, response and orchestration technologies delivered through our Helix cybersecurity operations platform. Helix is designed to enable more efficient security operations by correlating security and event data across an organization’s environment to determine which threats present the greatest risk, automate repetitive security processes, and provide tools and workflows to investigate and respond to attacks. The Helix cloud-based interface presents a unified view of an organization’s attack surface, including on-premise and cloud environments, and provides the contextual threat intelligence and threat management tools to enable a rapid response. The majority of our products, subscriptions and services are sold to end-customers through distributors, resellers, and strategic partners, with a lesser percentage of sales directly to our end-customers. On January 17, 2020, we acquired Cloudvisory LLC ("Cloudvisory"), a provider of cloud visibility and control solutions. Total consideration for the acquisition was $13.2 million in cash. We also assumed $0.3 million in net tangible liabilities. In May 2019, we acquired Verodin, Inc. ("Verodin"), a security instrumentation platform company. As consideration for the acquisition, we paid $143.7 million in cash, issued 8,404,609 shares of our common stock with an estimated fair value of $119.7 million and recognized $1.5 million of the fair value of assumed stock options attributable to pre-combination services. Basis of Presentation and Consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of FireEye, Inc. and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), and following the requirements of the Securities and Exchange Commission (“SEC”), for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by U.S. GAAP can be condensed or omitted. These unaudited condensed consolidated financial statements have been prepared on the same basis as our annual consolidated financial statements and, in the opinion of management, reflect all adjustments, consisting only of normal recurring adjustments, that are necessary for a fair statement of our financial information. The results of operations for the three months ended March 31, 2020 are not necessarily indicative of the results to be expected for the year ending December 31, 2020 or for any other interim period or for any other future year. The balance sheet as of December 31, 2019 has been derived from audited consolidated financial statements at that date but does not include all information required by U.S. GAAP for annual consolidated financial statements. The accompanying unaudited condensed consolidated financial statements and related financial information should be read in conjunction with the audited consolidated financial statements and the related notes thereto for the year ended December 31, 2019 included in our Annual Report on Form 10-K for the year ended December 31, 2019 . Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Such management estimates include, but are not limited to, determining the nature and timing of satisfaction of performance obligations, useful life of our security appliances that are dependent on intelligence and assessing the material rights associated with it, determining the standalone selling price of performance obligations, subscriptions and services, commissions expense including the period of benefit of customer acquisition cost, bonus expense, future taxable income, contract manufacturer liabilities, litigation and settlement costs and other loss contingencies, fair value of our equity awards, achievement of targets for performance stock units, fair value of the liability and equity components of the Convertible Senior Notes (as defined in Note 9) and the purchase price allocation of acquired businesses. We base our estimates on historical experience and on assumptions that we believe are reasonable. Changes in facts or circumstances may cause us to change our assumptions and estimates in future periods, and it is possible that actual results could differ from current or revised future estimates. Summary of Significant Accounting Policies There have been no significant changes to our significant accounting policies as of and for the three months ended March 31, 2020 , as compared to the significant accounting policies described in our Annual Report on Form 10-K for the year ended December 31, 2019 . Recently Adopted Accounting Pronouncements Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This standard requires capitalization of the implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. Further, the standard also requires the Company to expense the capitalized implementation costs of a hosting arrangement over the term of the hosting arrangement. We adopted the standard effective January 1, 2020. The standard did not have a significant impact on our condensed consolidated financial statements. Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This standard eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge (i.e. Step 2 of the current guidance), instead measuring the impairment charge as the excess of the reporting unit's carrying amount over its fair value (i.e. Step 1 of the current guidance). The guidance is effective for the Company beginning in the first quarter of 2020, and should be applied prospectively. Early adoption is permitted for impairment testing dates after January 1, 2017. We adopted the standard effective January 1, 2020. The standard did not have a significant impact on our condensed consolidated financial statements. Measurement of Credit Losses on Financial Instruments In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard changes the impairment model for most financial assets and certain other instruments by introducing a current expected credit loss ("CECL") model. The CECL model is a more forward-looking approach based on expected losses rather than incurred losses, requiring entities to estimate and record losses expected over the remaining contractual life of an asset. The guidance is effective for the Company beginning in the first quarter of 2020. Early adoption beginning January 1, 2019 is permitted. We adopted the standard effective January 1, 2020. The standard did not have a significant impact on our condensed consolidated financial statements. Simplifying Accounting for Income Taxes In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This standard simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in Topic 740 related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The new guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill and allocating consolidated income taxes to separate financial statements of entities not subject to income tax. ASU 2019-12 is effective for annual and interim periods in fiscal years beginning after December 15, 2020. Early adoption is permitted, and we adopted ASU 2019-12 as of January 1, 2020. The adoption did not have a significant impact on our consolidated financial statements. Recent Legislation On March 27, 2020, the Coronavirus Aid, Relief and Economic Security (CARES) Act was enacted and signed into U.S. law to provide economic relief to individuals and businesses facing economic hardship as a result of the COVID-19 pandemic. Changes in tax laws or rates are accounted for in the period of enactment. The income tax provisions of the CARES Act do not have a significant impact on our current taxes, deferred taxes, or uncertain tax positions.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The accounting guidance for fair value measurements provides a framework for measuring fair value on either a recurring or nonrecurring basis, whereby the inputs used in our valuation techniques are assigned a hierarchical level. The following are the three levels of inputs to measure fair value: • Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2: Inputs that reflect quoted prices for identical assets or liabilities in less active markets; quoted prices for similar assets or liabilities in active markets; benchmark yields, reported trades, broker/dealer quotes, inputs other than quoted prices that are observable for the assets or liabilities; or inputs that are derived principally from or corroborated by observable market data by correlation or other means. • Level 3: Unobservable inputs that reflect our own assumptions incorporated in valuation techniques used to measure fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available. We consider an active market to be one in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis, and consider an inactive market to be one in which there are infrequent or few transactions for the asset or liability, the prices are not current, or price quotations vary substantially either over time or among market makers. Where appropriate, our own or the counterparty’s non-performance risk is considered in measuring the fair values of assets. The following table presents our assets and liabilities measured at fair value on a recurring basis using the above input categories (in thousands): As of March 31, 2020 As of December 31, 2019 Description Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 33,732 $ — $ — $ 33,732 $ 24,246 $ — $ — $ 24,246 Total cash equivalents 33,732 — — 33,732 24,246 — — 24,246 Short-term investments: Certificates of deposit — 5,417 — 5,417 — 5,145 — 5,145 Corporate notes and bonds — 472,624 — 472,624 — 472,908 — 472,908 U.S. Treasuries — 41,155 — 41,155 — 48,069 — 48,069 U.S. Government agencies — 176,908 — 176,908 — 178,833 — 178,833 Total short-term investments — 696,104 — 696,104 — 704,955 — 704,955 Total assets measured at fair value $ 33,732 $ 696,104 $ — $ 729,836 $ 24,246 $ 704,955 $ — $ 729,201 Additionally, we have a restructuring liability related to certain real estate facilities that was calculated based on the present value of future non-lease payments, discounted at a rate commensurate with our current cost of financing as well as external ratings. This non-recurring fair value measurement is considered to be a Level 3 measurement due to the use of significant unobservable inputs. See Note 6 Restructuring Charges for a reconciliation of this liability. We measure certain assets, including goodwill, intangible assets and our equity-method investment in a privately held company at fair value on a nonrecurring basis when there are identifiable events or changes in circumstances that may have a significant adverse impact on the fair value of these assets. In light of the COVID-19 pandemic, we performed an analysis of impairment indicators of these assets and noted no adverse impact to their fair values as of March 31, 2020. The estimated fair value of the Convertible Senior Notes as of March 31, 2020 and December 31, 2019 was determined to be $1.1 billion . The fair value was determined based on the closing trading prices per $100 principal amount of the respective Convertible Senior Notes as of the last day of trading for the period. We consider the fair value of the Convertible Senior Notes to be a Level 2 measurement as they are not actively traded.

Investments

Investments	3 Months Ended
	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Investments	Investments Our investments consisted of the following (in thousands): As of March 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Certificates of deposit $ 5,368 $ 49 $ — $ 5,417 Corporate notes and bonds 474,461 1,299 (3,136 ) 472,624 U.S. Treasuries 41,055 106 (6 ) 41,155 U.S. Government agencies 176,380 534 (6 ) 176,908 Total $ 697,264 $ 1,988 $ (3,148 ) $ 696,104 As of December 31, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Certificates of deposit $ 5,118 $ 27 $ — $ 5,145 Corporate notes and bonds 471,172 1,950 (214 ) 472,908 U.S. Treasuries 48,086 2 (19 ) 48,069 U.S. Government agencies 178,891 52 (110 ) 178,833 Total $ 703,267 $ 2,031 $ (343 ) $ 704,955 The following tables present the gross unrealized losses and related fair values of our investments that have been in a continuous unrealized loss position (in thousands): As of March 31, 2020 Less Than 12 Months Greater Than 12 Months Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Certificates of deposit $ — $ — $ — $ — $ — $ — Corporate notes and bonds 258,386 (2,936 ) 23,814 (200 ) 282,200 (3,136 ) U.S. Treasuries — — 34,000 (6 ) 34,000 (6 ) U.S. Government agencies — — 35,803 (6 ) 35,803 (6 ) Total $ 258,386 $ (2,936 ) $ 93,617 $ (212 ) $ 352,003 $ (3,148 ) As of December 31, 2019 Less Than 12 Months Greater Than 12 Months Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Certificates of deposit $ 244 $ — $ — $ — $ 244 $ — Corporate notes and bonds $ 117,271 $ (205 ) $ 24,514 $ (9 ) $ 141,785 $ (214 ) U.S. Treasuries 5,041 (2 ) 33,996 (17 ) 39,037 (19 ) U.S. Government agencies 91,221 (103 ) 25,997 (7 ) 117,218 (110 ) Total $ 213,777 $ (310 ) $ 84,507 $ (33 ) $ 298,284 $ (343 ) Unrealized losses related to these investments are due to interest rate fluctuations as opposed to credit quality. In addition, we do not intend to sell, and it is not more likely than not that we would be required to sell, these investments before recovery of their cost basis. The following table summarizes the contractual maturities of our investments as of March 31, 2020 (in thousands): Amortized Cost Fair Value Due within one year $ 262,934 $ 263,045 Due within one to three years 434,330 433,059 Total $ 697,264 $ 696,104 All available-for-sale securities have been classified as current, based on management's ability to use the funds in current operations. As of March 31, 2020 , we held an 11.0% ownership interest in a privately held company, which is accounted for under the equity method based on our ability to exercise significant influence over operating and financial policies of the privately held company. This investment is classified within deposits and other long-term assets on our condensed consolidated balance sheets. The carrying value of this investment was $0.6 million as of March 31, 2020 and zero as of December 31, 2019

Property and Equipment

Property and Equipment	3 Months Ended
	Mar. 31, 2020
Property, Plant and Equipment [Abstract]
Property and Equipment	Property and Equipment Property and equipment, net consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 Computer equipment and software $ 206,359 $ 203,242 Leasehold improvements 63,220 64,180 Furniture and fixtures 15,498 15,496 Machinery and equipment 465 465 Total property and equipment 285,542 283,383 Less: accumulated depreciation (194,929 ) (189,571 ) Total property and equipment, net $ 90,613 $ 93,812 Depreciation and amortization expense related to property, equipment and demonstration units during the three months ended March 31, 2020 and 2019 was $9.0 million and $9.2 million , respectively. During the three months ended March 31, 2020 and 2019 , we capitalized $5.8 million and $5.5 million , respectively, of software development costs primarily related to our platform and cloud subscription offerings. Amortization expense related to capitalized software development costs during the three months ended March 31, 2020 and 2019 were $4.6 million and $3.5 million , respectively. Refer to Note 6 Restructuring Charges regarding fixed assets write-offs.

Business Combinations

Business Combinations	3 Months Ended
	Mar. 31, 2020
Business Combinations [Abstract]
Business Combinations	Business Combinations Acquisition of Cloudvisory On January 17, 2020, we acquired Cloudvisory, a provider of cloud visibility and control solutions. As consideration for the acquisition, we paid $13.2 million in cash. In addition, we also assumed $0.3 million in net tangible liabilities. The acquisition of Cloudvisory was accounted for in accordance with the acquisition method of accounting for business combinations with FireEye as the accounting acquirer. Under the acquisition method of accounting, the total purchase consideration is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The total purchase price of $13.2 million was allocated using the information available to us. As a result, we may continue to adjust the preliminary purchase price allocation after obtaining more information regarding asset valuations, liabilities assumed, and revisions of preliminary estimates. The results of operations of Cloudvisory have been included in our consolidated statements of operations from the acquisition date, though revenue and net income from Cloudvisory were not material for the three months ended March 31, 2020. Transaction costs were immaterial and expensed as incurred. Pro forma financial information has not been presented for this acquisition as the impact to our consolidated financial statements was not material. Allocation of the preliminary purchase price is as follows (in thousands): Amount Net tangible liabilities assumed $ (288 ) Intangible assets 5,650 Goodwill $ 7,846 Total preliminary purchase price allocation $ 13,208 The preliminary purchase price exceeded the fair value of the net tangible liabilities and identifiable intangible assets acquired, resulting in the recognition of goodwill. Goodwill is primarily attributable to expected synergies in our subscription offerings and cross-selling opportunities. None of the goodwill is expected to be deductible for U.S. federal income tax purposes. Intangible assets consist primarily of developed technology and trade name. Intangible assets attributable to developed technology include a combination of patented and unpatented technology, trade secrets, computer software and research processes that represent the foundation for the existing and planned new products to facilitate the generation of new content. Trade name is attributable to marketing goods and services under the Cloudvisory brand. The estimated useful life and fair values of the identifiable intangible assets are as follows (in thousands): Preliminary Estimated Useful Life (in years) Amount Developed technology 3 $ 5,500 Trade name 1 150 Total identifiable intangible assets $ 5,650 The value of developed technology was estimated using the excess earnings method, an income approach (Level 3), which converts projected revenues and costs into cash flows. To reflect the fact that certain other assets contribute to the cash flows generated, the returns for these contributory assets were removed to arrive at estimated cash flows solely attributable to the acquired technology, which were discounted at a rate of 35% to determine the fair value. The value of the trade name was estimated using the relief-from-royalty method, an income approach (Level 3), which estimates the cost savings that accrue to the owner of the intangibles asset that would otherwise be payable as royalties or license fees on revenues earned through the use of the asset. A royalty rate was applied to the projected revenues associated with the intangible asset to determine the amount of savings, which was at a rate of 35% to determine the fair value. Discount rates for each respective intangible asset were determined by accounting for the risk associated with each asset, including required technology development necessary to support respective projections, the uncertainty of market success and the risk inherent with projected financial results. The estimated useful lives were determined by evaluating the expected economic and useful lives of the assets and of similar intangible assets from previous business combinations and adjusting accordingly for circumstances that may be unique to Cloudvisory. Acquisition of Verodin On May 28, 2019, we acquired all outstanding shares of privately held Verodin, a security instrumentation platform company. We have incorporated the Verodin technology into our platform and analytics capabilities. In connection with this acquisition, we paid cash consideration of $143.7 million and issued 8,404,609 shares of our common stock with an estimated fair value of $119.7 million. We also assumed unvested stock options, which are now exercisable for our common stock, of which $1.5 million of the fair value has been accounted for as consideration for assumed awards pertaining to pre-combination service prior to acquisition. Based on the above, total purchase consideration for Verodin was $264.9 million. The acquisition of Verodin was accounted for in accordance with the acquisition method of accounting for business combinations with FireEye as the accounting acquirer. We expensed the related acquisition costs of $0.6 million in general and administrative expenses. Under the acquisition method of accounting, the total purchase consideration is allocated to the tangible and identifiable intangible assets acquired and liabilities assumed based on their estimated fair values. The total purchase price of $264.9 million was allocated using information currently available to us. As a result, we may continue to adjust the preliminary purchase price allocation after obtaining more information regarding asset valuations, liabilities assumed, and revisions of preliminary estimates. Pro forma financial information has not been presented for this acquisition as the impact to our consolidated financial statements was not material. Allocation of the preliminary purchase price is as follows (in thousands): Amount Net tangible assets assumed $ 15,036 Intangible assets 45,200 Deferred tax liability (1,158 ) Goodwill $ 205,804 Total preliminary purchase price allocation $ 264,882 The preliminary purchase price exceeded the fair value of the net tangible assets and identifiable intangible assets acquired, resulting in the recognition of goodwill. Goodwill is primarily attributable to expected synergies in our subscription offerings and cross-selling opportunities. None of the goodwill is expected to be deductible for U.S. federal income tax purposes. Intangible assets consist primarily of developed technology, customer relationships, trade name and contract backlog. Intangible assets attributable to developed technology include a combination of patented and unpatented technology, trade secrets, computer software and research processes that represent the foundation for the existing and planned new products to facilitate the generation of new content. Customer relationship intangibles relate to Verodin's ability to sell current and future content, as well as products built around this content, to its existing customers. Trade name is attributable to marketing goods and services under the Verodin brand. Contract backlog pertains to unbilled and unrecognized contracts yet to be fulfilled. The estimated useful life and fair values of the identifiable intangible assets are as follows (dollars in thousands): Preliminary Estimated Useful Life (in years) Amount Developed technology 5 $ 38,300 Customer relationships 5 4,600 Trade name 5 1,600 Contract backlog 2 700 Total identifiable intangible assets $ 45,200 The value of developed technology was estimated using the excess earnings method, an income approach (Level 3), which converts projected revenues and costs into cash flows. To reflect the fact that certain other assets contribute to the cash flows generated, the returns for these contributory assets were removed to arrive at estimated cash flows solely attributable to the acquired technology, which were discounted at a rate of 12% to determine the fair value. The value of customer relationships was estimated using the cost savings method, an income level approach (Level 3), which estimates the value of an asset based upon costs avoided through ownership of the asset. Estimated costs on projected revenues, excluding acquired contract backlog, were made using historical data pertaining to sales to new and existing customers. The cash flow impact of projected cost savings, primarily avoidance of legal costs pertaining to new customers and lower commission rates applicable to existing customers than new customers, were discounted at a rate of 11% to determine the fair value. The value of the trade name was estimated using the relief-from-royalty method, an income approach (Level 3), which estimates the cost savings that accrue to the owner of the intangibles asset that would otherwise be payable as royalties or license fees on revenues earned through the use of the asset. A royalty rate was applied to the projected revenues associated with the intangible asset to determine the amount of savings, which was at a rate of 12% to determine the fair value. The value of the contract backlog was estimated by discounting estimated cash flows from existing orders, an income level approach (Level 3). Using expected timing of backlog revenue realization by quarter, the cash flow estimates resulting therefrom were reduced by estimated fulfillment costs associated with completing the backlog obligations, and the net cash flows were then discounted at a rate of 8% to determine fair value. Discount rates for each respective intangible asset were determined by accounting for the risk associated with each asset, including required technology development and customer acquisition required to support respective projections, the uncertainty of market success and the risk inherent with projected financial results. The estimated useful lives were determined by evaluating the expected economic and useful lives of the assets and of similar intangible assets from previous business combinations and adjusting accordingly after taking into account circumstances that may be unique to Verodin. Goodwill and Purchased Intangible Assets Goodwill increased by $8.2 million for the three months ended March 31, 2020 . The increase was comprised of approximately $7.8 million due to the acquisition of Cloudvisory in January 2020 and $0.3 million due to a tax adjustment for the acquisition of Verodin in May 2019. Purchased intangible assets consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 Developed technology $ 153,803 $ 148,303 Content 158,700 158,700 Customer relationships 115,690 115,690 Contract backlog 13,200 13,200 Trade names 17,310 17,160 Non-competition agreements 1,400 1,400 Total intangible assets 460,103 454,453 Less: accumulated amortization (331,993 ) (320,033 ) Total net intangible assets $ 128,110 $ 134,420 Amortization expense of intangible assets during the three months ended March 31, 2020 and 2019 was $12.0 million and $12.1 million , respectively. The expected future annual amortization expense of intangible assets as of March 31, 2020 is presented below (in thousands): Years Ending December 31, Amount 2020 (remaining nine months) $ 33,093 2021 40,220 2022 28,942 2023 22,082 2024 3,692 2025 81 Total $ 128,110

Restructuring Charges

Restructuring Charges	3 Months Ended
	Mar. 31, 2020
Restructuring and Related Activities [Abstract]
Restructuring Charges	Restructuring Charges In January 2020, we implemented a restructuring plan designed primarily to align our resources with the strategic growth initiatives of the business. This restructuring plan resulted in a reduction of less than 2% of our total workforce as of March 31, 2020 as well as the impairment of certain long lived assets. The total provision for restructuring charges during the three months ended March 31, 2020 of $11.0 million includes $5.6 million of cash charges which consists of $2.0 million in provision for restructuring charges and $3.6 million in other adjustments, which was offset by a $0.2 million reduction in severance benefits from the third quarter of 2019 that were not utilized. In addition, there are non-cash charges of $5.4 million related to fixed asset and right-of-use asset write-offs. The following table sets forth the restructuring balance as of March 31, 2020 related to previous restructuring activities and a summary of restructuring activities during the three months ended March 31, 2020 (in thousands): Severance and related costs Facilities costs Total costs Balance, December 31, 2019 $ 164 $ 470 $ 634 Provision for restructuring charges 1,997 — 1,997 Cash payments (1,709 ) (34 ) (1,743 ) Other adjustments 3,498 (125 ) 3,373 Balance, March 31, 2020 $ 3,950 $ 311 $ 4,261 The remainder of the restructuring balance of $4.3 million at March 31, 2020 is primarily composed of $3.5 million consulting payments, $0.5 million of severance payments which we have paid, or expect to pay during the second quarter of 2020, and $0.3 million of non-cancelable non-lease costs which we expect to pay over the terms of the related obligations through the third quarter of 2021.

Leases

Leases	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Leases	Leases We have operating leases primarily for corporate offices. Our leases have remaining lease terms of one to ten years , some of which include options to extend the leases for up to five years , and some of which include options to terminate the leases within one year. The components of lease expenses were as follows (in thousands): Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Operating lease costs $ 4,418 $ 4,762 Short-term lease costs 527 937 Sublease income (274 ) (272 ) Total net lease costs $ 4,671 $ 5,427 Supplemental balance sheet information related to leases is as follows (in thousands, except lease term and discount rate): As of March 31, 2020 Operating leases: Operating lease right-of-use assets, net $ 58,045 Operating lease liabilities, current $ 19,017 Operating lease liabilities, non-current 68,277 Total operating lease liabilities $ 87,294 Weighted average remaining lease term (in years) 6.8 Weighted average discount rate 6.8 % Supplemental cash flow and other information related to leases is as follows (in thousands): Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,730 $ 2,585 Lease liabilities arising from obtaining right-of-use assets: Operating leases $ 478 $ 2,575 Undiscounted cash flows of operating lease liabilities are as follows (in thousands): Years Ending December 31, Amount 2020 (remaining nine months) $ 14,779 2021 18,511 2022 15,381 2023 13,376 2024 11,954 2025 11,346 2026 and thereafter 26,446 Total lease payments 111,793 Less: imputed interest (24,499 ) Total lease obligations 87,294 Less: current lease obligations (19,017 ) Long-term lease obligations $ 68,277 As of March 31, 2020 , we did not have any additional operating lease commitments for an office lease that has not yet commenced.

Deferred Revenue

Deferred Revenue	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Deferred Revenue	Deferred Revenue Deferred revenue consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 Product, subscription and support, current $ 485,268 $ 508,580 Professional services, current 87,265 95,364 Total deferred revenue, current 572,533 603,944 Product, subscription and support, non-current 346,505 369,589 Professional services, non-current 818 1,034 Total deferred revenue, non-current 347,323 370,623 Total deferred revenue $ 919,856 $ 974,567 Changes in the balance of deferred revenue for the periods presented are as follows (in thousands): Three Months Ended March 31, 2020 2019 Deferred revenue, beginning of period $ 974,567 $ 934,828 Billings for the period 170,011 181,906 Revenue recognized (224,722 ) (210,544 ) Deferred revenue, end of period $ 919,856 $ 906,190 Remaining Performance Obligations Transaction price allocated to remaining performance obligations represents contracted revenue that has not yet been recognized, which includes deferred revenue and non-cancelable contracts that will be invoiced and recognized as revenue in future periods ("backlog"). While deferred revenue is recorded on our balance sheet as a liability, backlog is not recorded in revenue, deferred revenue or elsewhere in our consolidated financial statements until we establish a contractual right to invoice, at which point it is recorded as revenue or deferred revenue as appropriate. As of March 31, 2020 , the aggregate amount of the transaction price allocated to remaining performance obligations was $919.9 million in deferred revenue and $15.5 million in backlog. We expect that the amount of backlog relative to the total value of our contracts will change from year to year due to several factors, including the amount invoiced early in the contract term, the timing and duration of customer agreements, varying invoicing cycles of agreements and changes in customer financial circumstances. Accordingly, we believe that fluctuations in backlog are not always a reliable indicator of future revenues and we do not utilize backlog internally as a key management metric. We expect to recognize these remaining performance obligations as follows (in percentages): Total Less than 1 year 1-2 years 2-3 years More than 3 years Deferred revenue 100% 62% 24% 11% 3% Backlog 100% 55% 34% 11% —%

Convertible Senior Notes

Convertible Senior Notes	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Convertible Senior Notes	Convertible Senior Notes Convertible Senior Notes due 2024 On May 24, 2018, we issued $525.0 million aggregate principal amount of 0.875% Convertible Senior Notes due 2024 (the "2024 Notes") in a private placement to qualified institutional purchasers pursuant to an exemption from registration provided by Section 4(a)(2) and Rule 144A under the Securities Act of 1933, as amended (the "Securities Act"). In addition, on June 5, 2018, we issued an additional $75.0 million aggregate principal amount of the 2024 Notes pursuant to the full exercise of the initial purchasers' option to purchase additional 2024 Notes, in a private placement exempt from the registration requirements of the Securities Act. The net proceeds from the offerings, after deducting the initial purchasers' discount of approximately $15.0 million and the issuance costs of approximately $0.6 million , were $584.4 million . We used (i) approximately $330.4 million of the net proceeds to repurchase approximately $340.2 million in aggregate principal amount outstanding of the Series A Notes (as defined below) in negotiated transactions with institutional investors and (ii) approximately $65.2 million of the net proceeds from the offering of the 2024 Notes to enter into capped call transactions (the "Capped Calls"). The 2024 Notes are unsecured obligations and rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the 2024 Notes. They rank equally in right of payment with all of our existing and future liabilities that are not expressly subordinated to the 2024 Notes including the Series A Notes and the Series B Notes (as defined below); and effectively rank junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness. The 2024 Notes are structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries. The 2024 Notes do not contain any financial covenants and do not restrict us from paying dividends or issuing or repurchasing other securities. The 2024 Notes bear interest at 0.875% per year, payable semiannually in arrears on June 1 and December 1 of each year, beginning December 1, 2018. The 2024 Notes mature on June 1, 2024, unless earlier repurchased, redeemed or converted. The initial conversion rate of the 2024 Notes is 43.1667 shares of our common stock per $1,000 of principal amount of the 2024 Notes, which is equivalent to an initial conversion price of approximately $23.17 per share of common stock. The conversion rate of the 2024 Notes may be adjusted pursuant to the terms of the indenture governing the 2024 Notes upon the occurrence of certain specified events, but not for accrued and unpaid interest. Holders may convert the 2024 Notes at their option in multiples of $1,000 principal amount prior to the business day preceding March 1, 2024, only under the following circumstances: • during any calendar quarter commencing after the calendar quarter ended on September 30, 2018 (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 a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price of the 2024 Notes on each applicable trading day; • during the five business day period after any five consecutive trading day period (the "measurement period") in which the trading price per $1,000 principal amount of the 2024 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 for the notes on each such trading day; • if we call any or all of the 2024 Notes for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the relevant redemption date; or • upon the occurrence of specified corporate events, as specified in each indenture governing the 2024 Notes. Regardless of the foregoing conditions, holders may convert their 2024 Notes at their option in multiples of $1,000 principal amount during the period from, and including, March 1, 2024 to the close of business on the second scheduled trading day immediately preceding the maturity date. Upon conversion, the 2024 Notes can be settled in cash, shares of our common stock or any combination of cash and shares of common stock at our option. Holders may also require us to repurchase the 2024 Notes if we undergo a "fundamental change," as defined in each indenture governing the 2024 Notes, at a repurchase price equal to 100% of the principal amount, plus accrued and unpaid interest to, but excluding, the fundamental change repurchase date. Additionally, we may redeem for cash all or any portion of the 2024 Notes on or after June 5, 2021, if the last reported sale price of our common stock has been at least 130% of the conversion price of the 2024 Notes then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) immediately preceding the date on which we provide notice of redemption at a redemption price equal to 100% of the principal amount of the notes to be redeemed, plus any accrued and unpaid interest to, but excluding, the redemption date. As of March 31, 2020 , none of the conditions permitting holders to convert their 2024 Notes had been satisfied and no shares of our common stock had been issued in connection with any conversions of the 2024 Notes. Based on the closing price of our common stock of $10.58 per share on March 31, 2020, the conversion value of the 2024 Notes was less than the principal amount of the 2024 Notes outstanding on a per 2024 Note basis. In accordance with accounting for debt with conversions and other options, we bifurcated the principal amount of the 2024 Notes into liability and equity components. The initial liability component of the 2024 Notes was valued at $458.3 million based on the contractual cash flows discounted at an appropriate comparable market non-convertible debt borrowing rate at the date of issuance of 5.5% with the equity component representing the residual amount of the proceeds of $141.7 million , which was recorded as a debt discount. Issuance costs were allocated pro rata based on the relative initial carrying amounts of the liability and equity components. As a result, transaction costs of $0.5 million and $0.1 million and initial purchasers' discount of $11.5 million and $3.5 million were attributable to the liability component and equity component of the 2024 Notes, respectively. The debt discount and the issuance costs allocated to the liability component are amortized as additional interest expense over the term of the 2024 Notes using the effective interest method as noted in the table below. The liability and equity components of the 2024 Notes consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 2024 Notes 2024 Notes Liability component: Principal $ 600,000 $ 600,000 Less: 2024 Notes discounts and issuance costs, net of amortization (111,108 ) (117,078 ) Net carrying amount $ 488,892 $ 482,922 Equity component, net of issuance costs $ 138,064 $ 138,064 The unamortized issuance costs as of March 31, 2020 will be amortized over a weighted-average remaining period of approximately 4.2 years. Interest expense related to the 2024 Notes consisted of the following (dollars in thousands): Three Months Ended March 31, 2020 2019 2024 Notes 2024 Notes Coupon interest $ 1,313 $ 1,313 Amortization of 2024 Notes discounts and issuance costs 5,970 5,684 Total interest expense recognized $ 7,283 $ 6,997 Effective interest rate on the liability component 6.0 % 6.1 % In connection with the 2024 Notes offering, we entered into the Capped Calls with certain counterparties affiliated with the initial purchasers of the 2024 Notes. The Capped Calls are expected to reduce potential dilution of earnings per share upon conversion of the 2024 Notes, and have an initial strike price of $23.17 per share, which corresponds to the initial conversion price of the 2024 Notes and which have a cap price of $34.32 per share. The Capped Calls do not meet the criteria for separate accounting as a derivative as they are indexed to our own stock and are accounted for as freestanding financial instruments. The premiums paid for the purchase of the Capped Calls in the amount of $65.2 million have been recorded as a reduction of the Company's additional paid-in capital in stockholder's equity in the accompanying Condensed Consolidated Financial Statements and fair values of the Capped Calls are not re-measured at each reporting period. Convertible Senior Notes due 2035 In June 2015, we issued $460.0 million principal amount of 1.000% Convertible Senior Notes due 2035 (the "Series A Notes") and $460.0 million principal amount of 1.625% Convertible Senior Notes due 2035 (the “Series B Notes” and together with the Series A Notes, the "2035 Notes", and the 2035 Notes, together with the 2024 Notes, the "Convertible Senior Notes") in a private placement to qualified institutional purchasers pursuant to an exemption from registration provided by Section 4(a)(2) and Rule 144A under the Securities Act. The net proceeds after the initial purchasers' discount of $23.0 million and issuance costs of $0.5 million from the 2035 Notes were $896.5 million . The Series A Notes and Series B Notes bear interest at 1.000% per year and 1.625% per year, respectively, payable semiannually in arrears on June 1 and December 1 of each year, beginning December 1, 2015. The 2035 Notes mature on June 1, 2035, unless earlier repurchased, redeemed or converted. The 2035 Notes are unsecured obligations and rank senior in right of payment to any of our indebtedness that is expressly subordinated in right of payment to the 2035 Notes. They rank equally in right of payment with all of our existing and future liabilities that are not expressly subordinated to the 2035 Notes and effectively rank junior in right of payment to any of our secured indebtedness to the extent of the value of the assets securing such indebtedness. They are structurally junior to all indebtedness and other liabilities (including trade payables) of our subsidiaries. The 2035 Notes do not contain any financial covenants and do not restrict us from paying dividends or issuing or repurchasing our other securities. The initial conversion rate on each series of 2035 Notes is 16.4572 shares of our common stock per $1,000 principal amount of 2035 Notes, which is equivalent to an initial conversion price of approximately $60.76 per share of common stock. The conversion rate of each series of 2035 Notes may be adjusted upon the occurrence of certain specified events, but not for accrued and unpaid interest. Holders may convert the 2035 Notes at their option in multiples of $1,000 principal amount prior to March 1, 2035, excluding the period from March 1, 2020 to June 1, 2020 in the case of the Series A Notes and March 1, 2022 to June 1, 2022 in the case of the Series B Notes, only under the following circumstances: • during any calendar quarter commencing after the calendar quarter ended on September 30, 2015 (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 a period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than or equal to 130% of the conversion price for the 2035 Notes of the relevant series on each applicable trading day; • during the five business day period after any five consecutive trading day period in which the trading price per $1,000 principal amount of Series A Notes or Series B Notes, as applicable, 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 for the notes of the relevant series on each such trading day; • if we call any or all of the 2035 Notes of a series for redemption, at any time prior to the close of business on the scheduled trading day immediately preceding the relevant redemption date; or • upon the occurrence of specified corporate events, as specified in each indenture governing the 2035 Notes. Regardless of the foregoing conditions, holders may convert their 2035 Notes at their option in multiples of $1,000 principal amount at any time during the period from March 1, 2020 to June 1, 2020 in the case of the Series A Notes and during the period from March 1, 2022 to June 1, 2022 in the case of the Series B Notes, or after March 1, 2035 until maturity for either series of 2035 Notes. Upon conversion, the 2035 Notes can be settled in cash, shares of our common stock or any combination thereof at our option. We may be required by holders of the 2035 Notes to repurchase all or any portion of their 2035 Notes at 100% of the principal amount plus accrued and unpaid interest, on each of June 1, 2020, June 1, 2025 and June 1, 2030, in the case of the Series A Notes, and each of June 1, 2022, June 1, 2025 and June 1, 2030 in the case of the Series B Notes. With respect to the upcoming June 1, 2020 repurchase date for the Series A Notes, in light of the recent trading price of our common stock, we expect that holders of the Series A Notes will likely require us to repurchase their Series A Notes that we expect to settle in cash on such June 1, 2020 repurchase date. Holders may also require us to repurchase the 2035 Notes if we undergo a "fundamental change," as defined in each indenture governing the 2035 Notes, at a purchase price equal to 100% of the principal amount, plus accrued and unpaid interest. Additionally, we may redeem for cash all or any portion of the Series B Notes on or after June 1, 2020 until June 1, 2022 if the last reported sale price of our common stock has been at least 130% of the conversion price then in effect for at least 20 trading days (whether or not consecutive) during any 30 consecutive trading day period (including the last trading day of such period) ending not more than three trading days immediately preceding the date we provide notice of redemption. We also may redeem for cash all or any portion of the Series A Notes on or after June 1, 2020 until maturity and all or any portion of the Series B Notes on or after June 1, 2022 until maturity, regardless of the foregoing sale price condition. In accordance with accounting for debt with conversions and other options, we allocated the principal amount of the 2035 Notes into liability and equity components. We also allocated the total amount of initial purchasers' discount and transaction costs incurred to the liability and equity components using the same proportions as the proceeds from the 2035 Notes. Transaction costs of $0.4 million and $0.1 million and initial purchasers' discount of $17.6 million and $5.4 million were attributable to the liability component and equity component of the 2035 Notes, respectively. Repurchase of a portion of the Series A Notes In May 2018, we used approximately $330.4 million of the net proceeds from the offering of the 2024 Notes to repurchase $340.2 million aggregate principal amount of the Series A Notes. The repurchase was accounted for as a partial extinguishment of the Series A Notes. The consideration of approximately $330.4 million used to repurchase the Series A Notes was allocated between the liability and equity components of the amount extinguished by determining the fair value of the liability component immediately prior to the debt extinguishment and allocating that portion of the repurchase price to the liability component in the amount of $317.4 million . The residual of the repurchase price of $13.0 million was allocated to the equity component of the Series A Notes as a reduction of additional paid-in capital. The fair value of the debt extinguished was calculated using a discount rate of 4.5% , representing an estimate of the Company's borrowing rate at the date of repurchase with a remaining expected life of two years. As part of the repurchase, we wrote-off a portion of the unamortized debt issuance cost apportioned to the principal amount of Series A Notes repurchased. We also recorded a loss on partial extinguishment of the Series A Notes of $10.8 million in Other Expense, net, representing the difference between the consideration attributed to the liability component and the sum of the net carrying amount of the liability component and unamortized costs. As of March 31, 2020 , $119.8 million aggregate principal amount of the Series A Notes remained outstanding. The liability and equity components of the remaining portion of 2035 Notes consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 Series A Notes Series B Notes Series A Notes Series B Notes Liability component: Principal $ 119,828 $ 460,000 $ 119,828 $ 460,000 Less: 2035 Notes discount and issuance costs, net of amortization (1,023 ) (44,772 ) (2,540 ) (49,650 ) Net carrying amount $ 118,805 $ 415,228 $ 117,288 $ 410,350 Equity component, net of issuance costs $ 79,555 $ 117,834 $ 79,555 $ 117,834 The unamortized discounts and issuance costs as of March 31, 2020 will be amortized over a weighted-average remaining period of approximately 2.1 years. Interest expense for the three months ended March 31, 2020 related to the 2035 Notes consisted of the following (dollars in thousands): Three Months Ended March 31, 2020 Series A Notes Series B Notes Coupon interest $ 300 $ 1,869 Amortization of 2035 Notes discount and issuance costs 1,518 4,877 Total interest expense recognized $ 1,818 $ 6,746 Effective interest rate on the liability component 6.2 % 6.6 % Interest expense for the three months ended March 31, 2019 related to the 2035 Notes consisted of the following (dollars in thousands): Three Months Ended March 31, 2019 Series A Notes Series B Notes Coupon interest $ 300 $ 1,869 Amortization of 2035 Notes discount and issuance costs 1,442 4,652 Total interest expense recognized $ 1,742 $ 6,521 Effective interest rate on the liability component 6.3 % 6.7 % Prepaid Forward Stock Purchase In connection with the issuance of the 2035 Notes, we also entered into privately negotiated prepaid forward transactions (the "Prepaid Forwards") with one of the initial purchasers of the 2035 Notes (the "Forward Counterparty"), pursuant to which we paid approximately $150.0 million . The amount of the prepaid is equivalent to approximately 3.3 million shares which are to be settled on or around June 1, 2020 and June 1, 2022, respectively, subject to any early settlement, in whole or in part, of each Prepaid Forward. The Prepaid Forwards are intended to facilitate privately negotiated derivative transactions by which investors in the 2035 Notes will be able to hedge their investment in the 2035 Notes. In the event we pay any cash dividends on our common stock, the Forward Counterparty will pay an equivalent amount back to us. The related shares were accounted for as a repurchase of common stock, and are presented as Treasury Stock in the unaudited condensed consolidated balance sheets. The 3.3 million shares of common stock purchased under the Prepaid Forwards are excluded from weighted-average shares outstanding for basic and diluted EPS purposes although they remain legally outstanding.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Letters of Credit We are party to letters of credit totaling $3.5 million and $3.6 million as of March 31, 2020 and December 31, 2019 , respectively, issued primarily in support of operating leases for several of our facilities. These letters of credit are collateralized by a line with our bank. No amounts have been drawn against these letters of credit. Contract Manufacturer Commitments Our independent contract manufacturers procure components and assemble our products based on our forecasts. These forecasts are based on estimates of future demand for our products, which are in turn based on historical trends and an analysis from our sales and product marketing organizations, adjusted for overall market conditions. In order to reduce manufacturing lead times and plan for adequate supply, we may issue forecasts and orders for components and products that are non-cancelable. As of March 31, 2020 and December 31, 2019 , we had non-cancelable open orders of $4.3 million and $5.0 million , respectively. We are required to record a liability for firm, non-cancelable and unconditional purchase commitments with contract manufacturers and suppliers for quantities in excess of our future demand forecasts. As of March 31, 2020 , we have not incurred nor accrued any significant liabilities for such non-cancelable commitments. Purchase Obligations As of March 31, 2020 , we had approximately $16.1 million of non-cancelable firm purchase commitments primarily for purchases of software and services. In situations where we have received delivery of the goods or services as of March 31, 2020 under purchase orders outstanding as of the same date, such amounts are reflected in the condensed consolidated balance sheet as accounts payable or accrued liabilities, and are excluded from the $16.1 million . Litigation From time to time, we are involved in claims and legal proceedings that arise in the ordinary course of business. Any claims or proceedings against us, whether meritorious or not, could be time consuming, result in costly litigation, require significant amounts of management time, result in the diversion of significant operational resources, or require us to enter into agreements which may not be available on terms favorable to us or at all. To the extent there is a reasonable possibility that a loss exceeding amounts already recognized may be incurred, and the amount of such additional loss would be material, we will either disclose the estimated additional loss or state that such an estimate cannot be made. We do not currently believe that it is reasonably possible that additional losses in connection with litigation arising in the ordinary course of business would be material. Indemnification Under the indemnification provisions of our standard sales related contracts, we agree to defend our customers against third-party claims asserting infringement of certain intellectual property rights, which may include patents, copyrights, trademarks, or trade secrets, and to pay judgments entered on such claims. Our exposure under these indemnification provisions is generally limited to the total amount paid by our customer under the agreement. However, certain agreements include indemnification provisions that could potentially expose us to losses in excess of the amount received under the agreement. In addition, we indemnify our officers, directors, and certain key employees for actions taken while they are or were serving in good faith in such capacities. Through March 31, 2020 , there have been no claims under any indemnification provisions.

Common Shares Reserved for Issu

Common Shares Reserved for Issuance	3 Months Ended
	Mar. 31, 2020
Equity [Abstract]
Common Shares Reserved for Issuance	Common Shares Reserved for Issuance Under our amended and restated certificate of incorporation, we are authorized to issue 100,000,000 shares of convertible preferred stock with a par value of $0.0001 per share, no ne of which were issued and outstanding as of March 31, 2020 or December 31, 2019 . Under our amended and restated certificate of incorporation, we are authorized to issue 1,000,000,000 shares of common stock with a par value of $0.0001 per share as of March 31, 2020 and December 31, 2019 . Each share of common stock outstanding is entitled to one vote. The holders of common stock are also entitled to receive dividends whenever funds are legally available and when declared by our Board of Directors, subject to the prior rights of holders of all classes of convertible preferred stock outstanding. We had reserved shares of common stock for issuance as follows (in thousands): As of March 31, 2020 As of December 31, 2019 Reserved under stock award plans 45,595 37,982 Convertible senior notes 35,442 35,442 Employee Stock Purchase Plan (ESPP) 5,656 3,428 Total 86,693 76,852

Equity Award Plans

Equity Award Plans	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
Equity Award Plans	Equity Award Plans We have operated under our 2013 Equity Incentive Plan ("2013 Plan") since our initial public offering ("IPO") in September 2013. Our 2013 Plan provides for the issuance of restricted stock and the granting of options, stock appreciation rights, performance shares, performance units and restricted stock units to our employees, officers, directors and consultants. Our 2013 Plan provides for annual increases in the number of shares available for issuance on the first day of each fiscal year. Awards granted under the 2013 Plan vest over the periods determined by our Board of Directors or compensation committee of our Board of Directors, generally four years , and stock options granted under the 2013 Plan expire no more than ten years after the date of grant. In the case of an incentive stock option granted to an employee who at the time of grant owns stock representing more than 10% of the total combined voting power of all classes of stock, the exercise price shall be no less than 110% of the fair value per share on the date of grant, and the award shall expire five years from the date of grant. For options granted to any other employee, the per share exercise price shall be no less than 100% of the fair value per share on the date of grant. In the case of non-statutory stock options and options granted to consultants, the per share exercise price shall be no less than 100% of the fair value per share on the date of grant. Stock that is purchased prior to vesting is subject to our right of repurchase at any time following termination of the participant's service for so long as such stock remains unvested. Approximatel y 16.7 million sha res and 12.2 million shares of our common stock were reserved for future grants as of March 31, 2020 and December 31, 2019 , respectively, under the 2013 Plan . Our 2013 Employee Stock Purchase Plan ("ESPP") allows eligible employees to acquire shares of our common stock at 85% of the lower of the fair market value of our common stock on the first trading day of each offering period or on the exercise date. Our ESPP provides for annual increases in the number of shares available for issuance on the first day of each fiscal year. An aggregate of approximately 5.7 million shares and 3.4 million shares of common stock were available for future issuance as of March 31, 2020 and December 31, 2019 , respectively, under our ESPP. From time to time, we also grant restricted common stock or restricted stock awards outside of our equity incentive plans to certain employees in connection with acquisitions. Stock Option Activity A summary of the activity for our stock option changes during the reporting period and a summary of information related to options outstanding and options exercisable are presented below (in thousands, except per share amounts and contractual life years): Options Outstanding Number of Weighted- Average Exercise Price (per share) Weighted- Aggregate Balance — December 31, 2019 4,391 $ 9.07 5.2 $ 45,931 Exercised (372 ) 3.63 4,053 Cancelled (55 ) 3.28 Balance — March 31, 2020 3,964 $ 9.66 4.7 $ 19,393 Options exercisable — March 31, 2020 2,836 $ 12.15 3.2 $ 11,282 The aggregate intrinsic value above represents the pre-tax difference between the exercise price of stock options and the quoted market price of our stock on that day for all in-the-money stock options. Restricted Stock Award ("RSA") and Restricted Stock Unit ("RSU") Activity A summary of the activity for our restricted common stock, RSAs and RSUs during the reporting periods and a summary of information related to unvested restricted common stock, RSAs and RSUs, including those expected to vest based on the achievement of a performance condition, are presented below (in thousands, except per share amounts and contractual life years): Number of Weighted- Weighted- Aggregate Unvested balance — December 31, 2019 21,697 $ 16.07 1.2 $ 358,651 Granted 10,718 15.09 Vested (3,427 ) 14.92 Cancelled (4,089 ) 17.49 Unvested balance — March 31, 2020 24,899 $ 15.11 1.4 $ 263,430 Unvested awards for which the requisite service period has not been rendered and vesting is subject to the achievement of a performance condition — March 31, 2020 1,095 $ 15.11 2.3 $ 11,586 Stock-Based Compensation We record stock-based compensation based on the fair value as determined on the date granted. We determine the fair value of stock options and shares of common stock to be issued under the ESPP using the Black-Scholes option-pricing model. The fair value of restricted stock units and restricted stock awards equals the market value of the underlying stock on the date of grant. We grant performance-based restricted stock units and restricted stock awards to certain employees which vest upon the achievement of certain performance conditions, subject to the employees’ continued service relationship with us. With respect to performance-based restricted stock units, we assess the probability of vesting at each reporting period and adjust our compensation cost based on this probability assessment. We recognize such compensation expense on a straight-line basis over the service providers' requisite service period. The following table summarizes the assumptions used in the Black-Scholes option-pricing model to determine fair value of our common shares to be issued under the ESPP for the offering periods beginning in May 2019: Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Fair value of common stock $14.59 - $16.35 $16.69 - $20.01 Risk-free interest rate 1.60% - 2.35% 2.08% - 2.70% Expected term (in years) 0.5 - 1.0 0.5 - 1.0 Volatility 29% - 39% 32% - 38% Dividend yield —% —% Stock-based compensation expense related to stock options, ESPP and restricted stock unit awards is included in the condensed consolidated statements of operations as follows (in thousands): Three Months Ended March 31, 2020 2019 Cost of product, subscription and support revenue $ 3,742 $ 3,947 Cost of professional services revenue 3,900 3,709 Research and development 11,545 12,424 Sales and marketing 11,486 12,540 General and administrative 5,505 7,703 Total $ 36,178 $ 40,323 As of March 31, 2020 , total compensation cost related to stock-based awards not yet recognized was $371.5 million , which is expected to be amortized on a straight-line basis over the weighted-average remaining vesting period of approximately 3.0 years.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We account for income taxes under the asset and liability method. Under this method, deferred income tax assets and liabilities are determined based upon the difference between the financial statement carrying amounts and the tax basis of assets and liabilities and are measured using the enacted tax rate expected to apply to taxable income in the years in which the differences are expected to be reversed. We recognized a provision for income taxes of $0.9 million and $2.2 million for the three months ended March 31, 2020 and 2019 , respectively. The decrease in the provision for income taxes was due primarily to lower foreign taxes and a tax benefit from the Verodin acquisition in the three months ended March 31, 2020 as compared to the three months ended March 31, 2019. On March 27, 2020, the Coronavirus Aid, Relief and Economic Security (CARES) Act was enacted and signed into U.S. law to provide economic relief to individuals and businesses facing economic hardship as a result of the COVID-19 pandemic. Changes in tax laws or rates are accounted for in the period of enactment. The income tax provisions of the CARES Act do not have a significant impact on our current taxes, deferred taxes, or uncertain tax positions.

Net Loss per Share

Net Loss per Share	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Net Loss per Share	Net Loss per Share Basic net loss per share is calculated by dividing net loss by the weighted average number of common shares outstanding during the period, less shares subject to repurchase, and excludes any dilutive effects of employee share-based awards and options. Diluted net income per common share is computed giving effect to all potentially dilutive common shares, including common stock issuable upon exercise of stock options, conversion of the Convertible Senior Notes, and unvested restricted common stock and stock units. As we had net losses for the three months ended March 31, 2020 and 2019 , all potential common shares were determined to be anti-dilutive. The following table sets forth the computation of net loss per common share (in thousands, except per share amounts): Three Months Ended March 31, 2020 2019 Numerator: Net loss $ (76,306 ) $ (75,375 ) Denominator: Weighted average number of shares outstanding—basic and diluted 217,789 197,819 Net loss per share—basic and diluted $ (0.35 ) $ (0.38 ) The following outstanding options and unvested shares were excluded (as common stock equivalents) from the computation of diluted net loss per common share for the periods presented as their effect would have been anti-dilutive (in thousands): As of March 31, 2020 2019 Options to purchase common stock 3,964 3,183 Unvested restricted stock awards and units 24,899 25,601 Convertible senior notes 35,442 35,442 ESPP shares 966 601

Employee Benefit Plan

Employee Benefit Plan	3 Months Ended
	Mar. 31, 2020
Retirement Benefits [Abstract]
Employee Benefit Plan	Employee Benefit Plan 401(k) Plan We have established a 401(k) tax-deferred savings plan (the “401(k) Plan”) which permits participants to make contributions by salary deduction pursuant to Section 401(k) of the Internal Revenue Code of 1986, as amended. All participants’ interests in their deferrals are 100% vested when contributed. We are responsible for administrative costs of the 401(k) Plan and have made no matching contributions into our 401(k) Plan since inception. Under the 401(k) Plan, pre-tax contributions are allocated to each participant’s individual account and are then invested in selected investment alternatives according to the participants’ directions. The 401(k) Plan is intended to qualify under Sections 401(a) and 501(a) of the Code. As a tax-qualified retirement plan, contributions to the 401(k) Plan and earnings on those contributions are not taxable to the employees until distributed, and all contributions are deductible by us when and if made.

Segment and Major Customers Inf

Segment and Major Customers Information	3 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Segment and Major Customers Information	Segment and Major Customers Information Disaggregation of revenue by geography We conduct business globally and are primarily managed on a geographic basis. Our Chief Executive Officer, who is our chief operating decision maker, reviews financial information presented on a consolidated basis accompanied by information about revenue by geographic region for purposes of allocating resources and evaluating financial performance. We define our regions into United States ("U.S."), Europe, the Middle East, and Africa ("EMEA"), Asia Pacific and Japan ("APAC"), and all remaining geographies (primarily Latin America and Canada) included in Others. There are no segment managers who are held accountable for operations, operating results, and plans for levels, components, or types of products or services below the consolidated unit level. Accordingly, we are considered to be in a single reportable segment and operating unit structure. Revenue by geographic region based on the billing address is as follows (in thousands): Three Months Ended March 31, 2020 2019 2020 2019 2020 2019 2020 2019 U.S. EMEA APAC Other Product and related subscription and support $ 59,988 $ 69,578 $ 20,606 $ 21,952 $ 20,723 $ 21,810 $ 4,370 $ 5,108 Platform, cloud subscription and managed services 46,012 33,979 10,176 8,357 8,796 6,387 3,411 2,732 Professional services 34,573 27,741 7,280 5,625 4,054 3,374 4,733 3,901 Total revenue $ 140,573 $ 131,298 $ 38,062 $ 35,934 $ 33,573 $ 31,571 $ 12,514 $ 11,741 We generate revenue from sales of our network, email and endpoint security solutions, network forensics appliances, cloud threat intelligence and analytics subscriptions, managed security, our Mandiant professional services, our Helix security operations platform, and our Mandiant security validation platform (formerly Verodin security instrumentation platform). We disaggregate our revenue into two main categories: (i) product, subscription, and support and (ii) professional services. Within the product, subscription and support category, we provide supplemental data to distinguish between solutions that are appliances dependent, and solutions and managed services that are not dependent on appliances. These solutions include security delivered entirely through the cloud or delivered through hybrid on premise/cloud platform. Security solutions that are dependent on appliances are included in the product and related subscription and support sub-category, and solutions and managed services without dependency on the appliances are included in the platform, cloud subscription and managed services sub-category. To complement our product, subscription and support solutions, we offer professional services, including incident response and other security consulting services, to our customers who have experienced a cyber security breach or desire assistance assessing the resilience of their information systems infrastructure. The majority of our professional services are offered on a time and materials basis, through a fixed fee arrangement, or on a retainer basis. Revenue from professional services is recognized as services are delivered. Revenue from our Expertise-on-Demand micro-services and some pre-paid professional services is deferred, and revenue is recognized when services are delivered. The following table depicts the disaggregation of revenue according to revenue type and is consistent with how we evaluate our financial performance (in thousands): Three Months Ended March 31, 2020 2019 Product and related subscription and support $ 105,688 $ 118,448 Platform, cloud subscription and managed services 68,395 51,455 Professional services 50,639 40,641 Total revenue $ 224,722 $ 210,544 Long lived assets by geography Long lived assets by geographic region based on physical location is as follows (in thousands): As of March 31, 2020 As of December 31, 2019 Property and equipment, net: United States $ 82,298 $ 85,287 International 8,315 8,525 Total property and equipment, net $ 90,613 $ 93,812 For the three months ended March 31, 2020 and 2019 , one distributor represented 10% and 16% , respectively, of our total revenue. For each of the three months ended March 31, 2020 and 2019 , one reseller represented 14% of our total revenue. Additionally, another distributor represented 11% of our total revenue for the three months ended March 31, 2020, but did not represent 10% or greater of our total revenue for the three months ended March 31, 2019. As of March 31, 2020 and December 31, 2019 , no customer represented 10% or more of our net accounts receivable balance.

Subsequent Events (Notes)

Subsequent Events (Notes)	3 Months Ended
	Mar. 31, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events On April 23, 2020, the Board of Directors of the Company approved a restructuring plan to streamline the Company’s operations to more closely align expenses to the Company’s projected revenue, position the Company for improved operating performance and allow the Company to increase investment in the growth areas of the business. The restructuring plan includes a reduction of approximately 6% of the Company’s workforce. The Company currently estimates that it will recognize pre-tax charges to its GAAP financial results of between $10 million and $15 million , consisting of severance and other one-time termination benefits, and other restructuring related costs. These charges are primarily cash-based and are expected to be recognized in the second quarter of 2020. The actions associated with the restructuring plan are expected to be completed by the end of the second quarter of 2020.

Description of Business and S_2

Description of Business and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation and Consolidation	Basis of Presentation and Consolidation The accompanying unaudited condensed consolidated financial statements include the accounts of FireEye, Inc. and its wholly owned subsidiaries. All intercompany balances and transactions have been eliminated in consolidation. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”), and following the requirements of the Securities and Exchange Commission (“SEC”), for interim reporting. As permitted under those rules, certain footnotes or other financial information that are normally required by U.S. GAAP can be condensed or omitted. These unaudited condensed consolidated financial statements have been prepared on the same basis as our annual consolidated financial statements and, in the opinion of management, reflect all adjustments, consisting only of normal recurring adjustments, that are necessary for a fair statement of our financial information. The results of operations for the three months ended March 31, 2020 are not necessarily indicative of the results to be expected for the year ending December 31, 2020 or for any other interim period or for any other future year. The balance sheet as of December 31, 2019 has been derived from audited consolidated financial statements at that date but does not include all information required by U.S. GAAP for annual consolidated financial statements. The accompanying unaudited condensed consolidated financial statements and related financial information should be read in conjunction with the audited consolidated financial statements and the related notes thereto for the year ended December 31, 2019 included in our Annual Report on Form 10-K for the year ended December 31, 2019 .
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Such management estimates include, but are not limited to, determining the nature and timing of satisfaction of performance obligations, useful life of our security appliances that are dependent on intelligence and assessing the material rights associated with it, determining the standalone selling price of performance obligations, subscriptions and services, commissions expense including the period of benefit of customer acquisition cost, bonus expense, future taxable income, contract manufacturer liabilities, litigation and settlement costs and other loss contingencies, fair value of our equity awards, achievement of targets for performance stock units, fair value of the liability and equity components of the Convertible Senior Notes (as defined in Note 9) and the purchase price allocation of acquired businesses. We base our estimates on historical experience and on assumptions that we believe are reasonable. Changes in facts or circumstances may cause us to change our assumptions and estimates in future periods, and it is possible that actual results could differ from current or revised future estimates.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract In August 2018, the FASB issued ASU 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract. This standard requires capitalization of the implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software. Further, the standard also requires the Company to expense the capitalized implementation costs of a hosting arrangement over the term of the hosting arrangement. We adopted the standard effective January 1, 2020. The standard did not have a significant impact on our condensed consolidated financial statements. Simplifying the Test for Goodwill Impairment In January 2017, the FASB issued ASU 2017-04, Intangibles - Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment. This standard eliminates the requirement to calculate the implied fair value of goodwill to measure a goodwill impairment charge (i.e. Step 2 of the current guidance), instead measuring the impairment charge as the excess of the reporting unit's carrying amount over its fair value (i.e. Step 1 of the current guidance). The guidance is effective for the Company beginning in the first quarter of 2020, and should be applied prospectively. Early adoption is permitted for impairment testing dates after January 1, 2017. We adopted the standard effective January 1, 2020. The standard did not have a significant impact on our condensed consolidated financial statements. Measurement of Credit Losses on Financial Instruments In June 2016, the FASB issued ASU 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. This standard changes the impairment model for most financial assets and certain other instruments by introducing a current expected credit loss ("CECL") model. The CECL model is a more forward-looking approach based on expected losses rather than incurred losses, requiring entities to estimate and record losses expected over the remaining contractual life of an asset. The guidance is effective for the Company beginning in the first quarter of 2020. Early adoption beginning January 1, 2019 is permitted. We adopted the standard effective January 1, 2020. The standard did not have a significant impact on our condensed consolidated financial statements. Simplifying Accounting for Income Taxes In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This standard simplifies the accounting for income taxes by eliminating certain exceptions to the guidance in Topic 740 related to the approach for intra-period tax allocation, the methodology for calculating income taxes in an interim period and the recognition of deferred tax liabilities for outside basis differences. The new guidance also simplifies aspects of the accounting for franchise taxes and enacted changes in tax laws or rates and clarifies the accounting for transactions that result in a step-up in the tax basis of goodwill and allocating consolidated income taxes to separate financial statements of entities not subject to income tax. ASU 2019-12 is effective for annual and interim periods in fiscal years beginning after December 15, 2020. Early adoption is permitted, and we adopted ASU 2019-12 as of January 1, 2020. The adoption did not have a significant impact on our consolidated financial statements. Recent Legislation On March 27, 2020, the Coronavirus Aid, Relief and Economic Security (CARES) Act was enacted and signed into U.S. law to provide economic relief to individuals and businesses facing economic hardship as a result of the COVID-19 pandemic. Changes in tax laws or rates are accounted for in the period of enactment. The income tax provisions of the CARES Act do not have a significant impact on our current taxes, deferred taxes, or uncertain tax positions.
Fair Value Measurements	The accounting guidance for fair value measurements provides a framework for measuring fair value on either a recurring or nonrecurring basis, whereby the inputs used in our valuation techniques are assigned a hierarchical level. The following are the three levels of inputs to measure fair value: • Level 1: Observable inputs that reflect quoted prices (unadjusted) for identical assets or liabilities in active markets. • Level 2: Inputs that reflect quoted prices for identical assets or liabilities in less active markets; quoted prices for similar assets or liabilities in active markets; benchmark yields, reported trades, broker/dealer quotes, inputs other than quoted prices that are observable for the assets or liabilities; or inputs that are derived principally from or corroborated by observable market data by correlation or other means. • Level 3: Unobservable inputs that reflect our own assumptions incorporated in valuation techniques used to measure fair value. These assumptions are required to be consistent with market participant assumptions that are reasonably available. We consider an active market to be one in which transactions for the asset or liability occur with sufficient frequency and volume to provide pricing information on an ongoing basis, and consider an inactive market to be one in which there are infrequent or few transactions for the asset or liability, the prices are not current, or price quotations vary substantially either over time or among market makers. Where appropriate, our own or the counterparty’s non-performance risk is considered in measuring the fair values of assets.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2020
Fair Value Disclosures [Abstract]
Schedule of Assets Measured at Fair Value on a Recurring Basis	The following table presents our assets and liabilities measured at fair value on a recurring basis using the above input categories (in thousands): As of March 31, 2020 As of December 31, 2019 Description Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets Cash equivalents: Money market funds $ 33,732 $ — $ — $ 33,732 $ 24,246 $ — $ — $ 24,246 Total cash equivalents 33,732 — — 33,732 24,246 — — 24,246 Short-term investments: Certificates of deposit — 5,417 — 5,417 — 5,145 — 5,145 Corporate notes and bonds — 472,624 — 472,624 — 472,908 — 472,908 U.S. Treasuries — 41,155 — 41,155 — 48,069 — 48,069 U.S. Government agencies — 176,908 — 176,908 — 178,833 — 178,833 Total short-term investments — 696,104 — 696,104 — 704,955 — 704,955 Total assets measured at fair value $ 33,732 $ 696,104 $ — $ 729,836 $ 24,246 $ 704,955 $ — $ 729,201

Investments (Tables)

Investments (Tables)	3 Months Ended
	Mar. 31, 2020
Investments, Debt and Equity Securities [Abstract]
Summary of Investments	Our investments consisted of the following (in thousands): As of March 31, 2020 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Certificates of deposit $ 5,368 $ 49 $ — $ 5,417 Corporate notes and bonds 474,461 1,299 (3,136 ) 472,624 U.S. Treasuries 41,055 106 (6 ) 41,155 U.S. Government agencies 176,380 534 (6 ) 176,908 Total $ 697,264 $ 1,988 $ (3,148 ) $ 696,104 As of December 31, 2019 Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Estimated Fair Value Certificates of deposit $ 5,118 $ 27 $ — $ 5,145 Corporate notes and bonds 471,172 1,950 (214 ) 472,908 U.S. Treasuries 48,086 2 (19 ) 48,069 U.S. Government agencies 178,891 52 (110 ) 178,833 Total $ 703,267 $ 2,031 $ (343 ) $ 704,955
Summary of Gross Unrealized Losses and Fair Value of Investments in a Continuous Unrealized Loss Position	The following tables present the gross unrealized losses and related fair values of our investments that have been in a continuous unrealized loss position (in thousands): As of March 31, 2020 Less Than 12 Months Greater Than 12 Months Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Certificates of deposit $ — $ — $ — $ — $ — $ — Corporate notes and bonds 258,386 (2,936 ) 23,814 (200 ) 282,200 (3,136 ) U.S. Treasuries — — 34,000 (6 ) 34,000 (6 ) U.S. Government agencies — — 35,803 (6 ) 35,803 (6 ) Total $ 258,386 $ (2,936 ) $ 93,617 $ (212 ) $ 352,003 $ (3,148 ) As of December 31, 2019 Less Than 12 Months Greater Than 12 Months Total Fair Value Unrealized Loss Fair Value Unrealized Loss Fair Value Unrealized Loss Certificates of deposit $ 244 $ — $ — $ — $ 244 $ — Corporate notes and bonds $ 117,271 $ (205 ) $ 24,514 $ (9 ) $ 141,785 $ (214 ) U.S. Treasuries 5,041 (2 ) 33,996 (17 ) 39,037 (19 ) U.S. Government agencies 91,221 (103 ) 25,997 (7 ) 117,218 (110 ) Total $ 213,777 $ (310 ) $ 84,507 $ (33 ) $ 298,284 $ (343 )
Summary of Contractual Maturities of Investments	The following table summarizes the contractual maturities of our investments as of March 31, 2020 (in thousands): Amortized Cost Fair Value Due within one year $ 262,934 $ 263,045 Due within one to three years 434,330 433,059 Total $ 697,264 $ 696,104

Property and Equipment (Tables)

Property and Equipment (Tables)	3 Months Ended
	Mar. 31, 2020
Property, Plant and Equipment [Abstract]
Schedule of Property and Equipment	Property and equipment, net consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 Computer equipment and software $ 206,359 $ 203,242 Leasehold improvements 63,220 64,180 Furniture and fixtures 15,498 15,496 Machinery and equipment 465 465 Total property and equipment 285,542 283,383 Less: accumulated depreciation (194,929 ) (189,571 ) Total property and equipment, net $ 90,613 $ 93,812

Business Combinations (Tables)

Business Combinations (Tables)	3 Months Ended
	Mar. 31, 2020
Business Combinations [Abstract]
Schedule of Purchase Price Allocation	Allocation of the preliminary purchase price is as follows (in thousands): Amount Net tangible liabilities assumed $ (288 ) Intangible assets 5,650 Goodwill $ 7,846 Total preliminary purchase price allocation $ 13,208 Amount Net tangible assets assumed $ 15,036 Intangible assets 45,200 Deferred tax liability (1,158 ) Goodwill $ 205,804 Total preliminary purchase price allocation $ 264,882
Schedule of Purchased Intangible Assets	Purchased intangible assets consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 Developed technology $ 153,803 $ 148,303 Content 158,700 158,700 Customer relationships 115,690 115,690 Contract backlog 13,200 13,200 Trade names 17,310 17,160 Non-competition agreements 1,400 1,400 Total intangible assets 460,103 454,453 Less: accumulated amortization (331,993 ) (320,033 ) Total net intangible assets $ 128,110 $ 134,420 The estimated useful life and fair values of the identifiable intangible assets are as follows (dollars in thousands): Preliminary Estimated Useful Life (in years) Amount Developed technology 5 $ 38,300 Customer relationships 5 4,600 Trade name 5 1,600 Contract backlog 2 700 Total identifiable intangible assets $ 45,200 The estimated useful life and fair values of the identifiable intangible assets are as follows (in thousands): Preliminary Estimated Useful Life (in years) Amount Developed technology 3 $ 5,500 Trade name 1 150 Total identifiable intangible assets $ 5,650
Schedule of Expected Annual Amortization Expense of Intangible Assets	The expected future annual amortization expense of intangible assets as of March 31, 2020 is presented below (in thousands): Years Ending December 31, Amount 2020 (remaining nine months) $ 33,093 2021 40,220 2022 28,942 2023 22,082 2024 3,692 2025 81 Total $ 128,110

Restructuring Charges (Tables)

Restructuring Charges (Tables)	3 Months Ended
	Mar. 31, 2020
Restructuring and Related Activities [Abstract]
Summary of Restructuring Activities	The following table sets forth the restructuring balance as of March 31, 2020 related to previous restructuring activities and a summary of restructuring activities during the three months ended March 31, 2020 (in thousands): Severance and related costs Facilities costs Total costs Balance, December 31, 2019 $ 164 $ 470 $ 634 Provision for restructuring charges 1,997 — 1,997 Cash payments (1,709 ) (34 ) (1,743 ) Other adjustments 3,498 (125 ) 3,373 Balance, March 31, 2020 $ 3,950 $ 311 $ 4,261

Leases (Tables)

Leases (Tables)	3 Months Ended
	Mar. 31, 2020
Leases [Abstract]
Components of Lease Expenses and Supplemental Balance Sheet, Cash Flow and Other Information	The components of lease expenses were as follows (in thousands): Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Operating lease costs $ 4,418 $ 4,762 Short-term lease costs 527 937 Sublease income (274 ) (272 ) Total net lease costs $ 4,671 $ 5,427 Supplemental balance sheet information related to leases is as follows (in thousands, except lease term and discount rate): As of March 31, 2020 Operating leases: Operating lease right-of-use assets, net $ 58,045 Operating lease liabilities, current $ 19,017 Operating lease liabilities, non-current 68,277 Total operating lease liabilities $ 87,294 Weighted average remaining lease term (in years) 6.8 Weighted average discount rate 6.8 % Supplemental cash flow and other information related to leases is as follows (in thousands): Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows from operating leases $ 4,730 $ 2,585 Lease liabilities arising from obtaining right-of-use assets: Operating leases $ 478 $ 2,575
Schedule of Undiscounted Cash Flows of Operating Lease Liabilities	Undiscounted cash flows of operating lease liabilities are as follows (in thousands): Years Ending December 31, Amount 2020 (remaining nine months) $ 14,779 2021 18,511 2022 15,381 2023 13,376 2024 11,954 2025 11,346 2026 and thereafter 26,446 Total lease payments 111,793 Less: imputed interest (24,499 ) Total lease obligations 87,294 Less: current lease obligations (19,017 ) Long-term lease obligations $ 68,277 As of March 31, 2020 , we did not have any additional operating lease commitments for an office lease that has not yet commenced.

Deferred Revenue (Tables)

Deferred Revenue (Tables)	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Schedule of Deferred Revenue	Deferred revenue consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 Product, subscription and support, current $ 485,268 $ 508,580 Professional services, current 87,265 95,364 Total deferred revenue, current 572,533 603,944 Product, subscription and support, non-current 346,505 369,589 Professional services, non-current 818 1,034 Total deferred revenue, non-current 347,323 370,623 Total deferred revenue $ 919,856 $ 974,567 Changes in the balance of deferred revenue for the periods presented are as follows (in thousands): Three Months Ended March 31, 2020 2019 Deferred revenue, beginning of period $ 974,567 $ 934,828 Billings for the period 170,011 181,906 Revenue recognized (224,722 ) (210,544 ) Deferred revenue, end of period $ 919,856 $ 906,190
Expected Recognition of Remaining Performance Obligations	We expect to recognize these remaining performance obligations as follows (in percentages): Total Less than 1 year 1-2 years 2-3 years More than 3 years Deferred revenue 100% 62% 24% 11% 3% Backlog 100% 55% 34% 11% —%

Convertible Senior Notes (Table

Convertible Senior Notes (Tables)	3 Months Ended
	Mar. 31, 2020
Debt Disclosure [Abstract]
Schedule of the Liability and Equity Components of the Convertible Senior Notes	The liability and equity components of the remaining portion of 2035 Notes consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 Series A Notes Series B Notes Series A Notes Series B Notes Liability component: Principal $ 119,828 $ 460,000 $ 119,828 $ 460,000 Less: 2035 Notes discount and issuance costs, net of amortization (1,023 ) (44,772 ) (2,540 ) (49,650 ) Net carrying amount $ 118,805 $ 415,228 $ 117,288 $ 410,350 Equity component, net of issuance costs $ 79,555 $ 117,834 $ 79,555 $ 117,834 The liability and equity components of the 2024 Notes consisted of the following (in thousands): As of March 31, 2020 As of December 31, 2019 2024 Notes 2024 Notes Liability component: Principal $ 600,000 $ 600,000 Less: 2024 Notes discounts and issuance costs, net of amortization (111,108 ) (117,078 ) Net carrying amount $ 488,892 $ 482,922 Equity component, net of issuance costs $ 138,064 $ 138,064
Schedule of Interest Expense related to the Convertible Senior Notes	Interest expense related to the 2024 Notes consisted of the following (dollars in thousands): Three Months Ended March 31, 2020 2019 2024 Notes 2024 Notes Coupon interest $ 1,313 $ 1,313 Amortization of 2024 Notes discounts and issuance costs 5,970 5,684 Total interest expense recognized $ 7,283 $ 6,997 Effective interest rate on the liability component 6.0 % 6.1 % Interest expense for the three months ended March 31, 2020 related to the 2035 Notes consisted of the following (dollars in thousands): Three Months Ended March 31, 2020 Series A Notes Series B Notes Coupon interest $ 300 $ 1,869 Amortization of 2035 Notes discount and issuance costs 1,518 4,877 Total interest expense recognized $ 1,818 $ 6,746 Effective interest rate on the liability component 6.2 % 6.6 % Interest expense for the three months ended March 31, 2019 related to the 2035 Notes consisted of the following (dollars in thousands): Three Months Ended March 31, 2019 Series A Notes Series B Notes Coupon interest $ 300 $ 1,869 Amortization of 2035 Notes discount and issuance costs 1,442 4,652 Total interest expense recognized $ 1,742 $ 6,521 Effective interest rate on the liability component 6.3 % 6.7 %

Common Shares Reserved for Is_2

Common Shares Reserved for Issuance (Tables)	3 Months Ended
	Mar. 31, 2020
Equity [Abstract]
Schedule of Reserved Shares of Common Stock for Issuance	We had reserved shares of common stock for issuance as follows (in thousands): As of March 31, 2020 As of December 31, 2019 Reserved under stock award plans 45,595 37,982 Convertible senior notes 35,442 35,442 Employee Stock Purchase Plan (ESPP) 5,656 3,428 Total 86,693 76,852

Equity Award Plans (Tables)

Equity Award Plans (Tables)	3 Months Ended
	Mar. 31, 2020
Share-based Payment Arrangement [Abstract]
Summary of the Activity for Stock Option Changes and Summary of Information Related to Options Outstanding and Options Exercisable	A summary of the activity for our stock option changes during the reporting period and a summary of information related to options outstanding and options exercisable are presented below (in thousands, except per share amounts and contractual life years): Options Outstanding Number of Weighted- Average Exercise Price (per share) Weighted- Aggregate Balance — December 31, 2019 4,391 $ 9.07 5.2 $ 45,931 Exercised (372 ) 3.63 4,053 Cancelled (55 ) 3.28 Balance — March 31, 2020 3,964 $ 9.66 4.7 $ 19,393 Options exercisable — March 31, 2020 2,836 $ 12.15 3.2 $ 11,282
Summary of Activity for Restricted Common Stock, RSAs and RSUs and Summary of Information Related to Unvested Restricted Common Stock, RSAs and RSUs and those Expected to Vest	A summary of the activity for our restricted common stock, RSAs and RSUs during the reporting periods and a summary of information related to unvested restricted common stock, RSAs and RSUs, including those expected to vest based on the achievement of a performance condition, are presented below (in thousands, except per share amounts and contractual life years): Number of Weighted- Weighted- Aggregate Unvested balance — December 31, 2019 21,697 $ 16.07 1.2 $ 358,651 Granted 10,718 15.09 Vested (3,427 ) 14.92 Cancelled (4,089 ) 17.49 Unvested balance — March 31, 2020 24,899 $ 15.11 1.4 $ 263,430 Unvested awards for which the requisite service period has not been rendered and vesting is subject to the achievement of a performance condition — March 31, 2020 1,095 $ 15.11 2.3 $ 11,586
Schedule of Assumptions used in Black-Scholes Option Pricing Model	The following table summarizes the assumptions used in the Black-Scholes option-pricing model to determine fair value of our common shares to be issued under the ESPP for the offering periods beginning in May 2019: Three Months Ended March 31, 2020 Three Months Ended March 31, 2019 Fair value of common stock $14.59 - $16.35 $16.69 - $20.01 Risk-free interest rate 1.60% - 2.35% 2.08% - 2.70% Expected term (in years) 0.5 - 1.0 0.5 - 1.0 Volatility 29% - 39% 32% - 38% Dividend yield —% —%
Schedule of Stock-Based Compensation Expense Related to Stock Options, ESPP and Restricted Stock Units and Awards	Stock-based compensation expense related to stock options, ESPP and restricted stock unit awards is included in the condensed consolidated statements of operations as follows (in thousands): Three Months Ended March 31, 2020 2019 Cost of product, subscription and support revenue $ 3,742 $ 3,947 Cost of professional services revenue 3,900 3,709 Research and development 11,545 12,424 Sales and marketing 11,486 12,540 General and administrative 5,505 7,703 Total $ 36,178 $ 40,323

Net Loss per Share (Tables)

Net Loss per Share (Tables)	3 Months Ended
	Mar. 31, 2020
Earnings Per Share [Abstract]
Schedule of Computation of Net Loss per Common Share	The following table sets forth the computation of net loss per common share (in thousands, except per share amounts): Three Months Ended March 31, 2020 2019 Numerator: Net loss $ (76,306 ) $ (75,375 ) Denominator: Weighted average number of shares outstanding—basic and diluted 217,789 197,819 Net loss per share—basic and diluted $ (0.35 ) $ (0.38 )
Schedule of Outstanding Options and Unvested Shares Excluded from Computation of Diluted Net Loss per Common Share	The following outstanding options and unvested shares were excluded (as common stock equivalents) from the computation of diluted net loss per common share for the periods presented as their effect would have been anti-dilutive (in thousands): As of March 31, 2020 2019 Options to purchase common stock 3,964 3,183 Unvested restricted stock awards and units 24,899 25,601 Convertible senior notes 35,442 35,442 ESPP shares 966 601

Segment and Major Customers I_2

Segment and Major Customers Information (Tables)	3 Months Ended
	Mar. 31, 2020
Segment Reporting [Abstract]
Disaggregation of Revenue	The following table depicts the disaggregation of revenue according to revenue type and is consistent with how we evaluate our financial performance (in thousands): Three Months Ended March 31, 2020 2019 Product and related subscription and support $ 105,688 $ 118,448 Platform, cloud subscription and managed services 68,395 51,455 Professional services 50,639 40,641 Total revenue $ 224,722 $ 210,544 Revenue by geographic region based on the billing address is as follows (in thousands): Three Months Ended March 31, 2020 2019 2020 2019 2020 2019 2020 2019 U.S. EMEA APAC Other Product and related subscription and support $ 59,988 $ 69,578 $ 20,606 $ 21,952 $ 20,723 $ 21,810 $ 4,370 $ 5,108 Platform, cloud subscription and managed services 46,012 33,979 10,176 8,357 8,796 6,387 3,411 2,732 Professional services 34,573 27,741 7,280 5,625 4,054 3,374 4,733 3,901 Total revenue $ 140,573 $ 131,298 $ 38,062 $ 35,934 $ 33,573 $ 31,571 $ 12,514 $ 11,741
Summary of Long lived Assets by Geographic Region Based on Physical Location	Long lived assets by geographic region based on physical location is as follows (in thousands): As of March 31, 2020 As of December 31, 2019 Property and equipment, net: United States $ 82,298 $ 85,287 International 8,315 8,525 Total property and equipment, net $ 90,613 $ 93,812

Description of Business and S_3

Description of Business and Summary of Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	Jan. 17, 2020	May 28, 2019	May 31, 2019
CloudVisory LLC
Business Acquisition [Line Items]
Purchase consideration, cash paid	$ 13.2
Liabilities assumed	$ 0.3
Verodin Inc
Business Acquisition [Line Items]
Total purchase consideration		$ 264.9
Purchase consideration, cash paid		$ 143.7	$ 143.7
Equity interest issuable (shares)		8,404,609	8,404,609
Consideration transferred, equity interests		$ 119.7	$ 119.7
Fair value of replacement awards		$ 1.5	$ 1.5

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Assets Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	$ 33,732	$ 24,246
Estimated Fair Value	696,104	704,955
Total assets measured at fair value	729,836	729,201
Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	5,417	5,145
Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	472,624	472,908
U.S. Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	41,155	48,069
U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	176,908	178,833
Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	33,732	24,246
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	33,732	24,246
Estimated Fair Value	0	0
Total assets measured at fair value	33,732	24,246
Level 1 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Level 1 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Level 1 | U.S. Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Level 1 | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Level 1 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	33,732	24,246
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	0	0
Estimated Fair Value	696,104	704,955
Total assets measured at fair value	696,104	704,955
Level 2 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	5,417	5,145
Level 2 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	472,624	472,908
Level 2 | U.S. Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	41,155	48,069
Level 2 | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	176,908	178,833
Level 2 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	0	0
Estimated Fair Value	0	0
Total assets measured at fair value	0	0
Level 3 | Certificates of deposit
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Level 3 | Corporate notes and bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Level 3 | U.S. Treasuries
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Level 3 | U.S. Government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimated Fair Value	0	0
Level 3 | Money market funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents	$ 0	$ 0

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($) $ in Billions	Mar. 31, 2020	Dec. 31, 2019
Level 2 | Convertible Senior Notes
Debt Instrument [Line Items]
Fair value of debt	$ 1.1	$ 1.1

Investments - Summary of Invest

Investments - Summary of Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Total	$ 697,264	$ 703,267
Gross Unrealized Gains	1,988	2,031
Gross Unrealized Losses	(3,148)	(343)
Estimated Fair Value	696,104	704,955
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Total	5,368	5,118
Gross Unrealized Gains	49	27
Gross Unrealized Losses	0	0
Estimated Fair Value	5,417	5,145
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Total	474,461	471,172
Gross Unrealized Gains	1,299	1,950
Gross Unrealized Losses	(3,136)	(214)
Estimated Fair Value	472,624	472,908
U.S. Treasuries
Debt Securities, Available-for-sale [Line Items]
Total	41,055	48,086
Gross Unrealized Gains	106	2
Gross Unrealized Losses	(6)	(19)
Estimated Fair Value	41,155	48,069
U.S. Government agencies
Debt Securities, Available-for-sale [Line Items]
Total	176,380	178,891
Gross Unrealized Gains	534	52
Gross Unrealized Losses	(6)	(110)
Estimated Fair Value	$ 176,908	$ 178,833

Investments - Summary of Gross

Investments - Summary of Gross Unrealized Losses and Fair Value of Investments in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value
Less Than 12 Months	$ 258,386	$ 213,777
Greater Than 12 Months	93,617	84,507
Total	352,003	298,284
Unrealized Loss
Less Than 12 Months	(2,936)	(310)
Greater Than 12 Months	(212)	(33)
Total	(3,148)	(343)
Certificates of deposit
Fair Value
Less Than 12 Months	0	244
Greater Than 12 Months	0	0
Total	0	244
Unrealized Loss
Less Than 12 Months	0	0
Greater Than 12 Months	0	0
Total	0	0
Corporate notes and bonds
Fair Value
Less Than 12 Months	258,386	117,271
Greater Than 12 Months	23,814	24,514
Total	282,200	141,785
Unrealized Loss
Less Than 12 Months	(2,936)	(205)
Greater Than 12 Months	(200)	(9)
Total	(3,136)	(214)
U.S. Treasuries
Fair Value
Less Than 12 Months	0	5,041
Greater Than 12 Months	34,000	33,996
Total	34,000	39,037
Unrealized Loss
Less Than 12 Months	0	(2)
Greater Than 12 Months	(6)	(17)
Total	(6)	(19)
U.S. Government agencies
Fair Value
Less Than 12 Months	0	91,221
Greater Than 12 Months	35,803	25,997
Total	35,803	117,218
Unrealized Loss
Less Than 12 Months	0	(103)
Greater Than 12 Months	(6)	(7)
Total	$ (6)	$ (110)

Investments - Summary of Contra

Investments - Summary of Contractual Maturities of Investments (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Amortized Cost
Due within one year	$ 262,934
Due within one to three years	434,330
Total	697,264	$ 703,267
Fair Value
Due within one year	263,045
Due within one to three years	433,059
Total	$ 696,104	$ 704,955

Investments - Narrative (Detail

Investments - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Mar. 31, 2020
Schedule of Equity Method Investments [Line Items]
Other than temporary impairment	$ 0
Private Company
Schedule of Equity Method Investments [Line Items]
Ownership percentage		11.00%
Investment, carrying value	$ 0	$ 600,000

Property and Equipment - Schedu

Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 285,542	$ 283,383
Less: accumulated depreciation	(194,929)	(189,571)
Total property and equipment, net	90,613	93,812
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment	206,359	203,242
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	63,220	64,180
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	15,498	15,496
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 465	$ 465

Property and Equipment - Narrat

Property and Equipment - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Depreciation and amortization	$ 9	$ 9.2
Capitalized software development costs	5.8	5.5
Amortization of capitalized software development costs	$ 4.6	$ 3.5

Business Combinations - Narrati

Business Combinations - Narrative (Details) $ in Thousands	Jan. 17, 2020USD ($)	May 28, 2019USD ($)shares	May 31, 2019USD ($)shares	Mar. 31, 2020USD ($)	Mar. 31, 2019USD ($)	Dec. 31, 2019USD ($)
Business Acquisition [Line Items]
Goodwill				$ 1,213,454		$ 1,205,292
Goodwill acquired				8,200
Amortization expense				$ 12,000	$ 12,100
CloudVisory LLC
Business Acquisition [Line Items]
Purchase consideration, cash paid	$ 13,200
Liabilities assumed	300
Goodwill	7,846
Goodwill acquired	$ 7,800
Verodin Inc
Business Acquisition [Line Items]
Purchase consideration, cash paid		$ 143,700	$ 143,700
Equity interest issuable (shares) | shares		8,404,609	8,404,609
Consideration transferred, equity interests		$ 119,700	$ 119,700
Fair value of replacement awards		1,500	1,500
Total purchase consideration		264,900
Acquisition costs		600
Goodwill		$ 205,804
Goodwill acquired			$ 300
Customer Relationships | Verodin Inc
Business Acquisition [Line Items]
Weighted average useful life		5 years
Contract Backlog | Verodin Inc
Business Acquisition [Line Items]
Weighted average useful life		2 years
Developed Technology | CloudVisory LLC
Business Acquisition [Line Items]
Weighted average useful life	3 years
Developed Technology | Verodin Inc
Business Acquisition [Line Items]
Weighted average useful life		5 years
Trade Names | CloudVisory LLC
Business Acquisition [Line Items]
Weighted average useful life	1 year
Trade Names | Verodin Inc
Business Acquisition [Line Items]
Weighted average useful life		5 years
Measurement Input, Discount Rate | Customer Relationships | Verodin Inc
Business Acquisition [Line Items]
Intangible assets, measurement input		0.11
Measurement Input, Discount Rate | Contract Backlog | Verodin Inc
Business Acquisition [Line Items]
Intangible assets, measurement input		0.08
Measurement Input, Discount Rate | Developed Technology | CloudVisory LLC
Business Acquisition [Line Items]
Intangible assets, measurement input	0.35
Measurement Input, Discount Rate | Developed Technology | Verodin Inc
Business Acquisition [Line Items]
Intangible assets, measurement input		0.12
Measurement Input, Royalty Rate | Trade Names | CloudVisory LLC
Business Acquisition [Line Items]
Intangible assets, measurement input	0.35
Measurement Input, Royalty Rate | Trade Names | Verodin Inc
Business Acquisition [Line Items]
Intangible assets, measurement input		0.12

Business Combinations - Purchas

Business Combinations - Purchase Price Allocation (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Jan. 17, 2020	Dec. 31, 2019	May 28, 2019
Business Acquisition [Line Items]
Goodwill	$ 1,213,454		$ 1,205,292
CloudVisory LLC
Business Acquisition [Line Items]
Net tangible assets assumed		$ (288)
Intangible assets		5,650
Goodwill		7,846
Total preliminary purchase price allocation		$ 13,208
Verodin Inc
Business Acquisition [Line Items]
Net tangible assets assumed				$ 15,036
Intangible assets				45,200
Deferred tax liability				(1,158)
Goodwill				205,804
Total preliminary purchase price allocation				$ 264,882

Business Combinations - Identif

Business Combinations - Identifiable Intangible Assets Acquired (Details) - USD ($) $ in Thousands	Jan. 17, 2020	May 28, 2019
CloudVisory LLC
Business Acquisition [Line Items]
Total identifiable intangible assets	$ 5,650
CloudVisory LLC | Developed technology
Business Acquisition [Line Items]
Preliminary Estimated Useful Life (in years)	3 years
Total identifiable intangible assets	$ 5,500
CloudVisory LLC | Trade names
Business Acquisition [Line Items]
Preliminary Estimated Useful Life (in years)	1 year
Total identifiable intangible assets	$ 150
Verodin Inc
Business Acquisition [Line Items]
Total identifiable intangible assets		$ 45,200
Verodin Inc | Developed technology
Business Acquisition [Line Items]
Preliminary Estimated Useful Life (in years)		5 years
Total identifiable intangible assets		$ 38,300
Verodin Inc | Customer relationships
Business Acquisition [Line Items]
Preliminary Estimated Useful Life (in years)		5 years
Total identifiable intangible assets		$ 4,600
Verodin Inc | Trade names
Business Acquisition [Line Items]
Preliminary Estimated Useful Life (in years)		5 years
Total identifiable intangible assets		$ 1,600
Verodin Inc | Contract backlog
Business Acquisition [Line Items]
Preliminary Estimated Useful Life (in years)		2 years
Total identifiable intangible assets		$ 700

Business Combinations - Purch_2

Business Combinations - Purchased Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Business Acquisition [Line Items]
Total intangible assets	$ 460,103	$ 454,453
Less: accumulated amortization	(331,993)	(320,033)
Total net intangible assets	128,110	134,420
Developed technology
Business Acquisition [Line Items]
Total intangible assets	153,803	148,303
Content
Business Acquisition [Line Items]
Total intangible assets	158,700	158,700
Customer relationships
Business Acquisition [Line Items]
Total intangible assets	115,690	115,690
Contract backlog
Business Acquisition [Line Items]
Total intangible assets	13,200	13,200
Trade names
Business Acquisition [Line Items]
Total intangible assets	17,310	17,160
Non-competition agreements
Business Acquisition [Line Items]
Total intangible assets	$ 1,400	$ 1,400

Business Combinations - Schedul

Business Combinations - Schedule of Expected Annual Amortization Expense of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Business Combinations [Abstract]
2020 (remaining nine months)	$ 33,093
2021	40,220
2022	28,942
2023	22,082
2024	3,692
2025	81
Total net intangible assets	$ 128,110	$ 134,420

Restructuring Charges - Summary

Restructuring Charges - Summary of Restructuring Activities (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020USD ($)
Restructuring Reserve [Roll Forward]
Provision for restructuring charges	$ 634
Provision for restructuring charges	1,997
Cash payments	(1,743)
Other adjustments	3,373
Balance, March 31, 2020	4,261
Severance and related costs
Restructuring Reserve [Roll Forward]
Provision for restructuring charges	164
Provision for restructuring charges	1,997
Cash payments	(1,709)
Other adjustments	3,498
Balance, March 31, 2020	3,950
Facilities costs
Restructuring Reserve [Roll Forward]
Provision for restructuring charges	470
Provision for restructuring charges	0
Cash payments	(34)
Other adjustments	(125)
Balance, March 31, 2020	$ 311

Restructuring Charges - Narrati

Restructuring Charges - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Percentage of workforce reduction	2.00%
Restructuring charges		$ 10,974	$ 3,799
Provision for restructuring charges		5,600
Reduction in severance benefits		200
Non-cash charges related to fix asset write-offs		5,400
Restructuring reserve		4,261		$ 634
Provision for Restructuring Charges
Restructuring Cost and Reserve [Line Items]
Provision for restructuring charges		2,000
Restructuring, other adjustments
Restructuring Cost and Reserve [Line Items]
Provision for restructuring charges		3,600
Consulting Payments
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		3,500
Severance
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		500
Facilities Costs
Restructuring Cost and Reserve [Line Items]
Restructuring reserve		$ 311		$ 470

Leases - Narrative (Details)

Leases - Narrative (Details)	3 Months Ended
	Mar. 31, 2020
Lessee, Lease, Description [Line Items]
Optional extension term	5 years
Optional termination period	1 year
Minimum
Lessee, Lease, Description [Line Items]
Optional termination period	1 year
Maximum
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term	10 years

Leases - Components of Lease Ex

Leases - Components of Lease Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease costs	$ 4,418	$ 4,762
Short-term lease costs	527	937
Sublease income	(274)	(272)
Total net lease costs	$ 4,671	$ 5,427

Leases - Supplemental Balance S

Leases - Supplemental Balance Sheet Information (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Operating leases:
Operating lease right-of-use assets, net	$ 58,045,000	$ 58,758,000
Operating lease liabilities, current	19,017,000	18,437,000
Operating lease liabilities, non-current	68,277,000	$ 70,481,000
Total operating lease liabilities	$ 87,294,000
Weighted average remaining lease term (in years)	6 years 9 months 18 days
Weighted average discount rate	6.80%

Leases - Supplemental Cash Flow

Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 4,730	$ 2,585
Lease liabilities arising from obtaining right-of-use assets:
Operating leases	$ 478	$ 2,575

Leases - Schedule of Undiscount

Leases - Schedule of Undiscounted Cash Flows of Operating Lease Liabilities (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020 (remaining nine months)	$ 14,779,000
2021	18,511,000
2022	15,381,000
2023	13,376,000
2024	11,954,000
2025	11,346,000
2026 and thereafter	26,446,000
Total	111,793,000
Less: imputed interest	(24,499,000)
Total operating lease liabilities	87,294,000
Less: current lease obligations	(19,017,000)	$ (18,437,000)
Long-term lease obligations	$ 68,277,000	$ 70,481,000

Deferred Revenue - Schedule of

Deferred Revenue - Schedule of Deferred Revenue (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Revenue from External Customer [Line Items]
Total deferred revenue, current	$ 572,533	$ 603,944
Total deferred revenue, non-current	347,323	370,623
Total deferred revenue	919,856	974,567	$ 906,190	$ 934,828
Product, subscription and support
Revenue from External Customer [Line Items]
Total deferred revenue, current	485,268	508,580
Total deferred revenue, non-current	346,505	369,589
Professional services
Revenue from External Customer [Line Items]
Total deferred revenue, current	87,265	95,364
Total deferred revenue, non-current	$ 818	$ 1,034

Deferred Revenue - Changes in D

Deferred Revenue - Changes in Deferred Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Deferred Revenue
Beginning balance	$ 974,567	$ 934,828
Billings for the period	170,011	181,906
Revenue recognized	(224,722)	(210,544)
Ending balance	$ 919,856	$ 906,190

Deferred Revenue - Narrative (D

Deferred Revenue - Narrative (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Revenue from Contract with Customer [Abstract]
Deferred revenue	$ 919,856	$ 974,567	$ 906,190	$ 934,828
Backlog	$ 15,500

Deferred Revenue - Remaining Pe

Deferred Revenue - Remaining Performance Obligations (Details)	3 Months Ended
	Mar. 31, 2020
Revenue from Contract with Customer [Abstract]
Deferred revenue	100.00%
Backlog	100.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue from Contract with Customer [Abstract]
Deferred revenue	62.00%
Backlog	55.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog, expected timing of satisfaction	1 year
Deferred revenue, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue from Contract with Customer [Abstract]
Deferred revenue	24.00%
Backlog	34.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog, expected timing of satisfaction	1 year
Deferred revenue, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-04-01
Revenue from Contract with Customer [Abstract]
Deferred revenue	11.00%
Backlog	11.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog, expected timing of satisfaction	1 year
Deferred revenue, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue from Contract with Customer [Abstract]
Deferred revenue	3.00%
Backlog	0.00%
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Backlog, expected timing of satisfaction
Deferred revenue, expected timing of satisfaction

Convertible Senior Notes - Narr

Convertible Senior Notes - Narrative - Convertible Senior Notes (Details)	May 24, 2018USD ($)$ / shares	May 24, 2018USD ($)day$ / shares	May 24, 2018USD ($)$ / shares	May 24, 2018USD ($)$ / shares	May 24, 2018USD ($)days$ / shares	May 31, 2018USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2015USD ($)day	Jun. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Jun. 30, 2015USD ($)days	Mar. 31, 2020USD ($)$ / shares	Dec. 31, 2018USD ($)	Dec. 31, 2019USD ($)	Jun. 05, 2018USD ($)	Dec. 31, 2015USD ($)$ / shares
Debt Instrument [Line Items]
Purchase of capped calls													$ 65,200,000
Convertible Senior Notes
Debt Instrument [Line Items]
Shares of common stock (per $1000 principal amount of notes)									0.0164572
Conversion price (usd per share) | $ / shares																$ 60.76
Threshold percentage of note price trigger									98.00%
Purchase price trigger percentage									100.00%
Redemption price triggered by fundamental change, percentage			100.00%
Redemption price, percentage			100.00%						100.00%
Remaining discount and issuance cost, weighted average amortization period												2 years 1 month 6 days
Convertible Senior Notes | Subsequent to September 30, 2015
Debt Instrument [Line Items]
Threshold trading days | day		20						20
Threshold consecutive trading days		30			30			30			30
Threshold percentage of stock price trigger			130.00%						130.00%
Convertible Senior Notes | Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Principal amount	$ 525,000,000	$ 525,000,000	$ 525,000,000	$ 525,000,000	$ 525,000,000										$ 75,000,000
Initial purchaser's discount	15,000,000	15,000,000	15,000,000	15,000,000	15,000,000
Debt issuance costs	$ 600,000	$ 600,000	$ 600,000	600,000	$ 600,000
Proceeds from issuance of convertible senior notes, net of issuance costs				584,400,000
Repurchase of convertible senior notes				330,400,000
Purchase of capped calls				$ 65,200,000
Interest rate	0.875%	0.875%	0.875%	0.875%	0.875%
Shares of common stock (per $1000 principal amount of notes)												0.0431167
Conversion price (usd per share) | $ / shares	$ 23.17	$ 23.17	$ 23.17	$ 23.17	$ 23.17
Threshold note trading days | day		5
Threshold consecutive note trading days	5 days
Threshold percentage of note price trigger			98.00%
Equity component of debt				$ 141,700,000
Remaining discount amortization period												4 years 2 months 12 days
Cap price (usd per share) | $ / shares	$ 34.32	$ 34.32	$ 34.32	$ 34.32	$ 34.32
Debt amount outstanding												$ 600,000,000		$ 600,000,000
Convertible Senior Notes | Convertible Senior Notes due 2024 | On or after June 1, 2020 until June 1, 2022
Debt Instrument [Line Items]
Threshold trading days | day		20
Threshold percentage of stock price trigger			130.00%
Convertible Senior Notes | Series A Notes
Debt Instrument [Line Items]
Principal amount							$ 460,000,000	$ 460,000,000	$ 460,000,000	$ 460,000,000	$ 460,000,000
Repurchase of convertible senior notes						$ 330,400,000
Repurchased principal amount of debt	$ 340,200,000	$ 340,200,000	$ 340,200,000	$ 340,200,000	$ 340,200,000	340,200,000
Interest rate							1.00%	1.00%	1.00%	1.00%	1.00%
Threshold note trading days | day								5
Threshold consecutive note trading days							5 days
Equity component of debt, subsequent adjustments						$ 13,000,000
Remaining expected life						2 years
Loss on repurchase of convertible senior notes						$ 10,800,000
Debt amount outstanding												119,828,000		119,828,000
Convertible Senior Notes | Series B Notes
Debt Instrument [Line Items]
Principal amount							$ 460,000,000	$ 460,000,000	$ 460,000,000	$ 460,000,000	$ 460,000,000
Initial purchaser's discount							23,000,000	23,000,000	23,000,000	23,000,000	23,000,000
Debt issuance costs							$ 500,000	$ 500,000	$ 500,000	500,000	$ 500,000
Proceeds from issuance of convertible senior notes, net of issuance costs										$ 896,500,000
Interest rate							1.625%	1.625%	1.625%	1.625%	1.625%
Debt amount outstanding												$ 460,000,000		$ 460,000,000
Convertible Senior Notes | Series B Notes | On or after June 1, 2020 until June 1, 2022
Debt Instrument [Line Items]
Threshold trading days | day								20
Threshold percentage of stock price trigger									130.00%
Required trading days since notice of redemption, not more than							3 days
Convertible Senior Notes | Debt, Liability Component
Debt Instrument [Line Items]
Initial purchaser's discount	11,500,000	11,500,000	11,500,000	11,500,000	11,500,000											$ 17,600,000
Debt issuance costs	500,000	500,000	500,000	500,000	500,000											400,000
Carrying amount of convertible debt	458,300,000	458,300,000	458,300,000	458,300,000	458,300,000
Convertible Senior Notes | Debt, Equity Component
Debt Instrument [Line Items]
Initial purchaser's discount	3,500,000	3,500,000	3,500,000	3,500,000	3,500,000											5,400,000
Debt issuance costs	$ 100,000	$ 100,000	$ 100,000	$ 100,000	$ 100,000											$ 100,000
Measurement Input, Discount Rate | Convertible Senior Notes | Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Discount rate	0.055	0.055	0.055	0.055	0.055
Measurement Input, Discount Rate | Convertible Senior Notes | Series A Notes
Debt Instrument [Line Items]
Discount rate						0.045
Common Stock
Debt Instrument [Line Items]
Closing share price (usd per share) | $ / shares												$ 10.58
Convertible senior notes | Convertible Senior Notes | Series A Notes
Debt Instrument [Line Items]
Repurchase of convertible senior notes						$ 317,400,000

Convertible Senior Notes - Sche

Convertible Senior Notes - Schedule of the Liability and Equity Components of the Convertible Senior Notes (Details) - Convertible Senior Notes - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Principal	$ 600,000	$ 600,000
Less: debt discount, net of amortization	(111,108)	(117,078)
Net carrying amount	488,892	482,922
Equity component, net of issuance costs	138,064	138,064
Series A Notes
Debt Instrument [Line Items]
Principal	119,828	119,828
Less: debt discount, net of amortization	(1,023)	(2,540)
Net carrying amount	118,805	117,288
Equity component, net of issuance costs	79,555	79,555
Series B Notes
Debt Instrument [Line Items]
Principal	460,000	460,000
Less: debt discount, net of amortization	(44,772)	(49,650)
Net carrying amount	415,228	410,350
Equity component, net of issuance costs	$ 117,834	$ 117,834

Convertible Senior Notes - Sc_2

Convertible Senior Notes - Schedule of Interest Expense related to the Convertible Senior Notes (Details) - Convertible Senior Notes - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Convertible Senior Notes due 2024
Debt Instrument [Line Items]
Coupon interest	$ 1,313	$ 1,313
Non-cash interest expense related to convertible senior notes	5,970	5,684
Total interest expense recognized	$ 7,283	$ 6,997
Effective interest rate on the liability component	6.00%	6.10%
Series A Notes
Debt Instrument [Line Items]
Coupon interest	$ 300	$ 300
Non-cash interest expense related to convertible senior notes	1,518	1,442
Total interest expense recognized	$ 1,818	$ 1,742
Effective interest rate on the liability component	6.20%	6.30%
Series B Notes
Debt Instrument [Line Items]
Coupon interest	$ 1,869	$ 1,869
Non-cash interest expense related to convertible senior notes	4,877	4,652
Total interest expense recognized	$ 6,746	$ 6,521
Effective interest rate on the liability component	6.60%	6.70%

Convertible Senior Notes - Na_2

Convertible Senior Notes - Narrative - Prepaid Forward Stock Purchase (Details) shares in Millions, $ in Millions	1 Months Ended
	Jun. 30, 2015USD ($)shares
Debt Disclosure [Abstract]
Stock repurchased during period | $	$ 150
Stock repurchase during period (shares) | shares	3.3

Commitments and Contingencies -

Commitments and Contingencies - Narrative (Details)	3 Months Ended
	Mar. 31, 2020USD ($)claim	Dec. 31, 2019USD ($)
Long-term Purchase Commitment [Line Items]
Letters of credit available	$ 3,500,000	$ 3,600,000
Amount drawn against letters of credit	0
Non-cancellable open orders	$ 4,300,000	$ 5,000,000
Number of claims | claim	0
Software and Services
Long-term Purchase Commitment [Line Items]
Non-cancellable open orders	$ 16,100,000

Common Shares Reserved for Is_3

Common Shares Reserved for Issuance - Narrative (Details)	3 Months Ended	12 Months Ended
	Mar. 31, 2020vote$ / sharesshares	Dec. 31, 2019vote$ / sharesshares
Class of Stock [Line Items]
Common stock, shares authorized (shares)	1,000,000,000	1,000,000,000
Common stock, par value (usd per share) | $ / shares	$ 0.0001	$ 0.0001
Voting right per common share | vote	1	1
Convertible Preferred Stock
Class of Stock [Line Items]
Preferred stock authorized (shares)	100,000,000	100,000,000
Preferred stock, par value (usd per share) | $ / shares	$ 0.0001	$ 0.0001
Preferred stock, shares issued (shares)	0	0
Preferred stock, outstanding (shares)	0	0

Common Shares Reserved for Is_4

Common Shares Reserved for Issuance - Schedule of Reserved Shares of Common Stock for Issuance (Details) - shares shares in Thousands	Mar. 31, 2020	Dec. 31, 2019
Class of Stock [Line Items]
Shares reserved for future issuance (shares)	86,693	76,852
Convertible senior notes
Class of Stock [Line Items]
Shares reserved for future issuance (shares)	35,442	35,442
Reserved under stock award plans
Class of Stock [Line Items]
Shares reserved for future issuance (shares)	45,595	37,982
Employee Stock Purchase Plan (ESPP)
Class of Stock [Line Items]
Shares reserved for future issuance (shares)	5,656	3,428

Equity Award Plans - Narrative

Equity Award Plans - Narrative (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (shares)	86,693	76,852
Compensation cost not yet recognized	$ 371.5
Compensation cost not yet recognized, period for recognition	3 years
Employee Stock Purchase Plan (ESPP)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (shares)	5,656	3,428
Acquisition price at lower of fair market value, percentage	85.00%
2013 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
General vesting period	4 years
Award expiration period from grant date	10 years
Employee stock ownership, combined voting power of all stock	10.00%
Minimum exercise price as a percentage of the fair value per share	110.00%
Award expiration period, for excess voting power grants	5 years
Shares reserved for future issuance (shares)	16,700	12,200
2013 Plan | Employee stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date fair value, percentage, no less than	100.00%

Equity Award Plans - Summary of

Equity Award Plans - Summary of the Activity for Stock Option Changes and Summary of Information Related to Options Outstanding and Options Exercisable (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Number of Shares
Beginning balance, options outstanding (shares)	4,391
Exercised (shares)	(372)
Cancelled (shares)	(55)
Ending balance, options outstanding (shares)	3,964	4,391
Options exercisable (shares)	2,836
Weighted- Average Exercise Price (per share)
Beginning balance (usd per share)	$ 9.07
Exercised (usd per share)	3.63
Cancelled (usd per share)	3.28
Ending balance (usd per share)	9.66	$ 9.07
Options exercisable (usd per share)	$ 12.15
Weighted- Average Contractual Life (years)
Balance	4 years 8 months 12 days	5 years 2 months 12 days
Options exercisable — March 31, 2020	3 years 2 months 12 days
Aggregate Intrinsic Value
Balance — December 31, 2018	$ 19,393	$ 45,931
Exercised	4,053
Options exercisable — March 31, 2020	$ 11,282

Equity Award Plans - Summary _2

Equity Award Plans - Summary of Activity for Restricted Common Stock, RSAs and RSUs and Summary of Information Related to Unvested Restricted Common Stock, RSAs and RSUs and those Expected to Vest (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Number of Shares
Beginning balance (in shares)	21,697
Granted (shares)	10,718
Vested (shares)	(3,427)
Cancelled (shares)	(4,089)
Ending balance (in shares)	24,899	21,697
Unvested awards subject to performance condition (in shares)	1,095
Weighted- Average Grant Date Fair Value (per share)
Beginning balance (usd per share)	$ 16.07
Granted (usd per share)	15.09
Vested (usd per share)	14.92
Cancelled (usd per share)	17.49
Ending balance (usd per share)	15.11	$ 16.07
Unvested awards subject to performance condition (usd per share)	$ 15.11
Weighted- Average Contractual Life (years)
Balance	1 year 4 months 24 days	1 year 2 months 12 days
Unvested awards subject to performance condition	2 years 3 months 18 days
Aggregate Intrinsic Value
Balance	$ 263,430	$ 358,651
Unvested awards for which the requisite service period has not been rendered and vesting is subject to the achievement of a performance condition — March 31, 2020	$ 11,586

Equity Award Plans - Assumption

Equity Award Plans - Assumptions (Details) - Employee Stock Purchase Plan (ESPP) - $ / shares	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of common stock (usd per share)		$ 16.69
Risk free interest rate, minimum	1.60%	2.08%
Risk free interest rate, maximum	2.35%	2.70%
Dividend yield	0.00%	0.00%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of common stock (usd per share)	$ 14.59
Expected term (in years)	6 months	6 months
Volatility	29.00%	32.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of common stock (usd per share)	$ 16.35	$ 20.01
Expected term (in years)	1 year	1 year
Volatility	39.00%	38.00%

Equity Award Plans - Schedule o

Equity Award Plans - Schedule of Stock-Based Compensation Expense Related to Stock Options, ESPP and Restricted Stock Units and Awards (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 36,178	$ 40,323
Cost of product, subscription and support revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,742	3,947
Cost of professional services revenue
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	3,900	3,709
Research and development
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	11,545	12,424
Sales and marketing
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	11,486	12,540
General and administrative
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Stock-based compensation expense	$ 5,505	$ 7,703

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 925	$ 2,182

Net Loss per Share - Schedule o

Net Loss per Share - Schedule of Computation of Net Loss per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator:
Net loss	$ (76,306)	$ (75,375)
Denominator:
Weighted average number of shares outstanding—basic and diluted (shares)	217,789	197,819
Net loss per share—basic and diluted (usd per share)	$ (0.35)	$ (0.38)

Net Loss per Share - Schedule_2

Net Loss per Share - Schedule of Outstanding Options and Unvested Shares Excluded from Computation of Diluted Net Loss per Common Share (Details) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Options to purchase common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from net loss per share (shares)	3,964	3,183
Unvested restricted stock awards and units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from net loss per share (shares)	24,899	25,601
Convertible senior notes
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from net loss per share (shares)	35,442	35,442
ESPP shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from net loss per share (shares)	966	601

Employee Benefit Plan - Narrati

Employee Benefit Plan - Narrative (Details)	3 Months Ended
	Mar. 31, 2020USD ($)
Retirement Benefits [Abstract]
Employer contributions vested percentage	100.00%
Employer contributions to 401(k)	$ 0

Segment and Major Customers I_3

Segment and Major Customers Information - Schedule of Revenue by Geographic Region (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 224,722	$ 210,544
U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	140,573	131,298
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	38,062	35,934
APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	33,573	31,571
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	12,514	11,741
Product and related subscription and support
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	105,688	118,448
Product and related subscription and support | U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	59,988	69,578
Product and related subscription and support | EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	20,606	21,952
Product and related subscription and support | APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	20,723	21,810
Product and related subscription and support | Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	4,370	5,108
Platform, cloud subscription and managed services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	68,395	51,455
Platform, cloud subscription and managed services | U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	46,012	33,979
Platform, cloud subscription and managed services | EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	10,176	8,357
Platform, cloud subscription and managed services | APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	8,796	6,387
Platform, cloud subscription and managed services | Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	3,411	2,732
Professional services
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	50,639	40,641
Professional services | U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	34,573	27,741
Professional services | EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	7,280	5,625
Professional services | APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	4,054	3,374
Professional services | Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 4,733	$ 3,901

Segment and Major Customers I_4

Segment and Major Customers Information - Revenue by Product (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 224,722	$ 210,544
Product and related subscription and support
Segment Reporting Information [Line Items]
Revenue	105,688	118,448
Platform, cloud subscription and managed services
Segment Reporting Information [Line Items]
Revenue	68,395	51,455
Professional services
Segment Reporting Information [Line Items]
Revenue	$ 50,639	$ 40,641

Segment and Major Customers I_5

Segment and Major Customers Information - Summary of Long lived Assets by Geographic Region Based on Physical Location (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Entity Location [Line Items]
Total property and equipment, net	$ 90,613	$ 93,812
United States
Entity Location [Line Items]
Total property and equipment, net	82,298	85,287
International
Entity Location [Line Items]
Total property and equipment, net	$ 8,315	$ 8,525

Segment and Major Customers I_6

Segment and Major Customers Information - Narrative (Details) - reporting_segment	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue, Major Customer [Line Items]
Number of reportable segments	1
Customer concentration risk | Sales revenue, net | One Distributor
Revenue, Major Customer [Line Items]
Concentration risk percentage	10.00%	16.00%
Customer concentration risk | Sales revenue, net | One Reseller
Revenue, Major Customer [Line Items]
Concentration risk percentage	14.00%
Customer concentration risk | Sales revenue, net | Second Distributor
Revenue, Major Customer [Line Items]
Concentration risk percentage	11.00%

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ in Millions	Apr. 23, 2020	Mar. 31, 2019
Subsequent Event [Line Items]
Percentage of workforce reduction		2.00%
Subsequent Event
Subsequent Event [Line Items]
Percentage of workforce reduction	6.00%
Minimum | Subsequent Event
Subsequent Event [Line Items]
Restructuring charges	$ 10
Maximum | Subsequent Event
Subsequent Event [Line Items]
Restructuring charges	$ 15