Snap (SNAP) 10-Q 22 Oct 19 2019 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Oct. 17, 2019
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Trading Symbol	SNAP
Entity Central Index Key	0001564408
Entity Registrant Name	SNAP INC
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Title of 12(b) Security	Class A Common Stock, par value $0.00001 per share
Security Exchange Name	NYSE
Entity File Number	001-38017
Entity Tax Identification Number	45-5452795
Entity Address, Address Line One	2772 Donald Douglas Loop North
Entity Address, City or Town	Santa Monica
Entity Address, State or Province	CA
Entity Incorporation, State or Country Code	DE
Entity Address, Postal Zip Code	90405
City Area Code	(310)
Local Phone Number	399-3339
Document Quarterly Report	true
Document Transition Report	false
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		1,138,349,322
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		32,056,088
Class C Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		229,564,537

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities
Net loss	$ (227,375)	$ (325,148)	$ (792,956)	$ (1,064,243)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	20,646	24,898	66,625	68,966
Stock-based compensation	161,228	126,809	519,358	416,439
Deferred income taxes	170	(124)	195	129
Lease exit charges	0	29,340	0	33,268
Gain on divestiture	0	0	(39,883)	0
Amortization of debt discount and issuance costs	6,412	0	6,412	0
Other	(1,245)	8,608	(4,561)	(679)
Change in operating assets and liabilities, net of effect of acquisitions:
Accounts receivable, net of allowance	(62,855)	(18,834)	(30,736)	15,937
Prepaid expenses and other current assets	(490)	(435)	(4,980)	(3,059)
Operating lease right-of-use asset	35,633	0	57,254	0
Other assets	2,139	7,089	4,540	20,314
Accounts payable	4,220	2,084	28,319	(44,638)
Accrued expenses and other current liabilities	23,243	14,841	16,655	(14,664)
Operating lease liabilities	(36,008)	0	(63,259)	0
Other liabilities	(1,867)	(1,671)	(1,099)	8,360
Net cash used in operating activities	(76,149)	(132,543)	(238,116)	(563,870)
Cash flows from investing activities
Purchases of property and equipment	(7,938)	(26,285)	(27,385)	(97,501)
Sales of property and equipment	0	0	29	0
Proceeds from divestiture, net	0	0	73,796	0
Non-marketable investments	(1,050)	(250)	(3,750)	(21,260)
Purchases of marketable securities	(1,115,358)	(444,369)	(1,924,398)	(1,318,467)
Sales of marketable securities	24,948	0	102,437	45,007
Maturities of marketable securities	411,079	560,465	1,193,739	1,926,802
Other	0	0	1,000	(2,565)
Net cash provided by (used in) investing activities	(688,319)	89,561	(584,532)	532,016
Cash flows from financing activities
Proceeds from issuance of convertible notes, net of issuance costs	1,251,848	0	1,251,848	0
Purchase of capped calls	(102,086)	0	(102,086)	0
Proceeds from the exercise of stock options	7,788	142	14,726	47,865
Stock repurchases from employees for tax withholdings	0	0	0	(551)
Net cash provided by financing activities	1,157,550	142	1,164,488	47,314
Change in cash, cash equivalents, and restricted cash	393,082	(42,840)	341,840	15,460
Cash, cash equivalents, and restricted cash, beginning of period	337,732	395,307	388,974	337,007
Cash, cash equivalents, and restricted cash, end of period	730,814	352,467	730,814	352,467
Supplemental disclosures
Cash paid for income taxes, net	$ 643	$ 758	$ 564	$ 3,155

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement [Abstract]
Revenue	$ 446,199	$ 297,695	$ 1,154,646	$ 790,624
Costs and expenses:
Cost of revenue	223,140	197,554	642,399	585,917
Research and development	211,599	203,510	663,983	607,742
Sales and marketing	123,240	97,552	332,626	301,350
General and administrative	117,073	122,450	365,370	369,358
Total costs and expenses	675,052	621,066	2,004,378	1,864,367
Operating loss	(228,853)	(323,371)	(849,732)	(1,073,743)
Interest income	10,317	7,011	25,579	19,715
Interest expense	(8,654)	(919)	(10,219)	(2,783)
Other income (expense), net	(1,481)	(7,625)	41,477	(4,533)
Loss before income taxes	(228,671)	(324,904)	(792,895)	(1,061,344)
Income tax benefit (expense)	1,296	(244)	(61)	(2,899)
Net loss	$ (227,375)	$ (325,148)	$ (792,956)	$ (1,064,243)
Net loss per share attributable to Class A, Class B, and Class C common stockholders (Note 3):
Basic	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)
Diluted	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)
Weighted average shares used in computation of net loss per share:
Basic	1,393,358	1,309,918	1,364,327	1,277,293
Diluted	1,393,358	1,309,918	1,364,327	1,277,293

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (227,375)	$ (325,148)	$ (792,956)	$ (1,064,243)
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on marketable securities, net of tax	(12)	71	609	564
Foreign currency translation	(9,263)	(1,808)	(10,929)	(8,251)
Total other comprehensive income (loss), net of tax	(9,275)	(1,737)	(10,320)	(7,687)
Total comprehensive income (loss)	$ (236,650)	$ (326,885)	$ (803,276)	$ (1,071,930)

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 728,828	$ 387,149
Marketable securities	1,531,902	891,914
Accounts receivable, net of allowance	374,090	354,965
Prepaid expenses and other current assets	42,243	41,900
Total current assets	2,677,063	1,675,928
Property and equipment, net	177,073	212,560
Operating lease right-of-use assets	250,225
Intangible assets, net	72,371	126,054
Goodwill	621,758	632,370
Other assets	65,882	67,194
Total assets	3,864,372	2,714,106
Current liabilities
Accounts payable	56,572	30,876
Operating lease liabilities	49,725
Accrued expenses and other current liabilities	262,766	261,815
Total current liabilities	369,063	292,691
Convertible senior notes, net	880,391
Operating lease liabilities, noncurrent	284,798
Other liabilities	5,705	110,416
Total liabilities	1,539,957	403,107
Commitments and contingencies (Note 8)
Stockholders’ equity
Additional paid-in capital	9,036,801	8,220,417
Accumulated other comprehensive income (loss)	(7,173)	3,147
Accumulated deficit	(6,705,226)	(5,912,578)
Total stockholders’ equity	2,324,415	2,310,999
Total liabilities and stockholders’ equity	3,864,372	2,714,106
Class A Non-voting Common Stock
Stockholders’ equity
Common stock, value	11	10
Class B Voting Common Stock
Stockholders’ equity
Common stock, value		1
Class C Voting Common Stock
Stockholders’ equity
Common stock, value	$ 2	$ 2

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2019	Dec. 31, 2018
Class A Non-voting Common Stock
Common stock par value	$ 0.00001	$ 0.00001
Common stock authorized	3,000,000,000	3,000,000,000
Common stock issued	1,132,915,000	999,304,000
Common stock outstanding	1,132,915,000	999,304,000
Class B Voting Common Stock
Common stock par value	$ 0.00001	$ 0.00001
Common stock authorized	700,000,000	700,000,000
Common stock issued	32,057,000	93,846,000
Common stock outstanding	32,057,000	93,846,000
Class C Voting Common Stock
Common stock par value	$ 0.00001	$ 0.00001
Common stock authorized	260,888,000	260,888,000
Common stock issued	229,564,000	224,611,000
Common stock outstanding	229,564,000	224,611,000

Consolidated Statements of Stoc

Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Class A Non-voting Common StockCommon Stock	Class B Voting Common StockCommon Stock	Class C Voting Common StockCommon Stock
Balance, beginning of period, shares at Dec. 31, 2017					883,022	122,564	216,616
Balance, beginning of period at Dec. 31, 2017		$ 7,634,825	$ (4,656,667)	$ 14,157	$ 9	$ 1	$ 2
Shares issued in connection with exercise of stock options under stock-based compensation plans, shares					15,511	3,201
Shares issued in connection with exercise of stock options under stock-based compensation plans		47,806
Issuance of voting/non-voting common stock for vesting of restricted stock units and restricted stock awards, shares					42,538	2,891
Conversion of stock to voting/non-voting common stock, shares					34,995	(34,995)
Issuance of Class C voting common stock for settlement of restricted stock awards net, Shares							4,875
Stock-based compensation expense		416,439
Stock repurchases from employees for tax withholdings		(551)
Net loss	$ (1,064,243)		(1,064,243)
Other comprehensive income (loss), net of tax	$ (7,687)			(7,687)
Balance, end of period, shares at Sep. 30, 2018	1,291,218				976,066	93,661	221,491
Balance, end of period at Sep. 30, 2018	$ 2,384,092	8,098,519	(5,720,910)	6,470	$ 9	$ 1	$ 2
Balance, beginning of period, shares at Jun. 30, 2018					958,801	94,471	219,891
Balance, beginning of period at Jun. 30, 2018		7,971,610	(5,395,762)	8,207	$ 10	$ 1	$ 2
Shares issued in connection with exercise of stock options under stock-based compensation plans, shares					262	224
Shares issued in connection with exercise of stock options under stock-based compensation plans		100
Issuance of voting/non-voting common stock for vesting of restricted stock units and restricted stock awards, shares					15,252	717
Issuance of voting/non-voting common stock for vesting of restricted stock units and restricted stock awards, net					$ (1)
Conversion of stock to voting/non-voting common stock, shares					1,751	(1,751)
Issuance of Class C voting common stock for settlement of restricted stock awards net, Shares							1,600
Stock-based compensation expense		126,809
Net loss	(325,148)		(325,148)
Other comprehensive income (loss), net of tax	$ (1,737)			(1,737)
Balance, end of period, shares at Sep. 30, 2018	1,291,218				976,066	93,661	221,491
Balance, end of period at Sep. 30, 2018	$ 2,384,092	8,098,519	(5,720,910)	6,470	$ 9	$ 1	$ 2
Balance, beginning of period, shares at Dec. 31, 2018					999,304	93,846	224,611
Balance, beginning of period at Dec. 31, 2018	2,310,999	8,220,417	(5,912,578)	3,147	$ 10	$ 1	$ 2
Shares issued in connection with exercise of stock options under stock-based compensation plans, shares					3,024	1,162
Shares issued in connection with exercise of stock options under stock-based compensation plans		14,768
Issuance of voting/non-voting common stock for vesting of restricted stock units and restricted stock awards, shares					67,336	300
Issuance of Class A non-voting common stock in connection with acquisitions and divestitures		6,913
Conversion of stock to voting/non-voting common stock, shares					63,251	(63,251)
Conversion of stock to voting/non-voting common stock		(1)			$ 1	$ (1)
Issuance of Class C voting common stock for settlement of restricted stock awards net, Shares							4,953
Stock-based compensation expense		519,358
Equity component of convertible senior notes, net	377,432
Purchase of Capped Calls		(102,086)
Net loss	(792,956)		(792,956)
Other comprehensive income (loss), net of tax	$ (10,320)			(10,320)
Balance, end of period, shares at Sep. 30, 2019	1,394,536				1,132,915	32,057	229,564
Balance, end of period at Sep. 30, 2019	$ 2,324,415	9,036,801	(6,705,226)	(7,173)	$ 11		$ 2
Balance, beginning of period, shares at Jun. 30, 2019					1,096,653	47,582	227,914
Balance, beginning of period at Jun. 30, 2019		8,592,434	(6,477,851)	2,102	$ 11		$ 2
Shares issued in connection with exercise of stock options under stock-based compensation plans, shares					1,300	373
Shares issued in connection with exercise of stock options under stock-based compensation plans		7,794
Issuance of voting/non-voting common stock for vesting of restricted stock units and restricted stock awards, shares					19,055	9
Issuance of voting/non-voting common stock for vesting of restricted stock units and restricted stock awards, net					$ (1)
Conversion of stock to voting/non-voting common stock, shares					15,907	(15,907)
Conversion of stock to voting/non-voting common stock		(1)			$ 1
Issuance of Class C voting common stock for settlement of restricted stock awards net, Shares							1,650
Stock-based compensation expense		161,228
Equity component of convertible senior notes, net	377,432
Purchase of Capped Calls		(102,086)
Net loss	(227,375)		(227,375)
Other comprehensive income (loss), net of tax	$ (9,275)			(9,275)
Balance, end of period, shares at Sep. 30, 2019	1,394,536				1,132,915	32,057	229,564
Balance, end of period at Sep. 30, 2019	$ 2,324,415	$ 9,036,801	(6,705,226)	$ (7,173)	$ 11		$ 2
Cumulative-effect adjustment from accounting changes			$ 308

Description of Business and Sum

Description of Business and Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Description of Business and Summary of Significant Accounting Policies	1. Description of Business and Summary of Significant Accounting Policies Snap Inc. is a camera company. Snap Inc. (“we,” “our,” or “us”) was formed as Future Freshman, LLC, a California limited liability company, in 2010. We changed our name to Toyopa Group, LLC in 2011, incorporated as Snapchat, Inc., a Delaware corporation, in 2012, and changed our name to Snap Inc. in 2016. Snap Inc. is headquartered in Santa Monica, California. Our flagship product, Snapchat, is a camera application that was created to help people communicate through short videos and images called “Snaps.” Basis of Presentation The accompanying unaudited consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Our consolidated financial statements include the accounts of Snap Inc. and our wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Our fiscal year ends on December 31. These unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018, as filed with the SEC on February 6, 2019 (the “Annual Report”). In our opinion, the unaudited interim consolidated financial statements include all adjustments of a normal recurring nature necessary for the fair presentation of our financial position, results of operations, and cash flows. The results of operations for the three and nine months ended September 30, 2019 are not necessarily indicative of the results to be expected for the year ending December 31, 2019. Other than described below, there have been no changes to our significant accounting policies described in our Annual Report that have had a material impact on our consolidated financial statements and related notes. Use of Estimates The preparation of our consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements. Management’s estimates are based on historical information available as of the date of the consolidated financial statements and various other assumptions that we believe are reasonable under the circumstances. Actual results could differ from those estimates. Key estimates relate primarily to determining the fair value of assets and liabilities assumed in business combinations, evaluation of contingencies, uncertain tax positions, excess inventory reserves, lease exit charges, forfeiture rate, the fair value of convertible senior notes, and the fair value of stock-based awards. On an ongoing basis, management evaluates our estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities. Convertible Notes We account for the convertible senior notes (“Convertible Notes”) as separate liability and equity components. The carrying amount of the liability component is calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component, representing the conversion option, is calculated by deducting the fair value of the liability component from the total principal of the Convertible Notes. This amount represents a debt discount which is amortized to interest expense over the term of the Convertible Notes using the effective interest rate method, which maintains a constant rate of interest expense based on the increasing carrying value of the debt. Recent Accounting Pronouncements In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842)

Revenue

Revenue	9 Months Ended
	Sep. 30, 2019
Revenue From Contract With Customer [Abstract]
Revenue	2. Revenue Revenue is recognized when control of the promised goods or services is transferred to our customers, in an amount that reflects the consideration we expect to receive in exchange for those goods or services. We determine collectability by performing ongoing credit evaluations and monitoring customer accounts receivable balances. Sales tax is excluded from reported revenue. We generate substantially all of our revenues by offering various advertising products on Snapchat, which include Snap Ads and Sponsored Creative Tools, and measurement services, referred to as advertising revenue. Sponsored Creative Tools include Sponsored Geofilters and Sponsored Lenses. Sponsored Geofilters allow users to interact with an advertiser’s brand by enabling stylized brand artwork to be overlaid on a Snap. Sponsored Lenses allow users to interact with an advertiser’s brand by enabling branded augmented reality experiences. The substantial majority of advertising revenue is generated from the display of advertisements on Snapchat through contractual agreements that are either on a fixed fee basis over a period of time or based on the number of advertising impressions delivered. Revenue related to agreements based on the number of impressions delivered is recognized when the advertisement is displayed. Revenue related to fixed fee arrangements is recognized ratably over the service period, typically less than 30 days in duration, and such arrangements do not contain minimum impression guarantees. In determining whether an arrangement exists, we ensure that an agreement, such as an insertion order or self-serve terms, have been fully executed or accepted electronically. We sell advertising directly to advertisers (“Snap-sold” revenue) and certain partners that provide content on Snapchat (“content partners”) also sell directly to advertisers (“partner-sold” revenue). Snap Ads may be subject to revenue sharing agreements between us and our content partners. Our Sponsored Creative Tools and measurement services are only Snap-sold and are not subject to revenue sharing arrangements. Snap-sold revenue is recognized based on the gross amount that we charge the advertiser. Partner-sold revenue is recognized based on the net amount of revenue to be received from the content partners. We recognize Snap-sold revenue on a gross basis predominantly because we are the primary obligor responsible for fulfilling advertisement delivery, including the acceptability of the services delivered. For Snap-sold advertising, we enter into contractual arrangements directly with advertisers. We are directly responsible for the fulfillment of the contractual terms and any remedy for issues with such fulfillment. For Snap-sold revenue, we also have latitude in establishing the selling price with the advertiser, as we sell advertisements at a rate determined at our sole discretion. We recognize partner-sold revenue on a net basis predominantly because the content partner, and not Snap, is the primary obligor responsible for fulfillment, including the acceptability of the services delivered. In partner-sold advertising arrangements, the content partner has a direct contractual relationship with the advertiser. There is no contractual relationship between us and the advertiser for partner-sold transactions. When a content partner sells advertisements, the content partner is responsible for fulfilling the advertisements, and accordingly, we have determined the content partner is the primary obligor. Additionally, we do not have any latitude in establishing the price with the advertiser for partner-sold advertising. The content partner may sell advertisements at a rate determined at its sole discretion. For the periods presented, partner-sold revenue was not material. We also generate revenue from sales of our hardware product, Spectacles. For the periods presented, revenue from the sales of Spectacles was not material. The following table represents our revenue disaggregated by geography based on the billing address of the advertising customer: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (in thousands) Revenue: North America (1) (2) $ 280,072 $ 196,320 $ 713,822 $ 534,878 Europe (3) 78,967 49,033 202,997 120,364 Rest of world (4) 87,160 52,342 237,827 135,382 Total revenue $ 446,199 $ 297,695 $ 1,154,646 $ 790,624 (1) North America includes Mexico, the Caribbean, and Central America. (2) United States revenue was $269.2 million and $188.5 million for the three months ended September 30, 2019 and 2018, respectively, and $685.3 million and $515.4 million for the nine months ended September 30, 2019 and 2018, respectively. (3) Europe includes Russia and Turkey. (4) Greater China revenue was $44.8 million for the three months ended September 30, 2019.

Net Loss per Share

Net Loss per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Net Loss per Share	3. Net Loss per Share We compute net loss per share using the two-class method required for multiple classes of common stock. Our participating securities include any shares issued on the early exercise of stock options subject to repurchase because holders of such shares have non-forfeitable dividend rights in the event a dividend is paid on common stock. In March 2017, we completed our initial public offering (“IPO”) in which we issued and sold 160.3 million shares of Class A common stock, inclusive of the over-allotment. In addition, on the closing of the IPO, our Chief Executive Officer (“CEO”) received an RSU award (“CEO award”) for 37.4 million shares of Series FP preferred stock, which was fully vested on grant and automatically converted into an equivalent number of shares of Class C common stock on the closing of the IPO. Basic net loss per share is computed by dividing net loss attributable to each class of stockholders by the weighted-average number of such class of shares of stock outstanding during the period. Vested restricted stock units (“RSUs”) that have not been settled, including the vested CEO award, and restricted stock awards (“RSAs”) for which the risk of forfeiture has lapsed have been included in the appropriate common share class used to calculate basic net loss per share. For the calculation of diluted net loss per share, net loss per share attributable to common stockholders for basic net loss per share is adjusted by the effect of dilutive securities, including awards under our equity compensation plans. Diluted net loss per share attributable to common stockholders is computed by dividing the resulting net loss attributable to common stockholders by the weighted-average number of fully diluted common shares outstanding. We use the if-converted method for calculating any potential dilutive effect of the Convertible Notes on diluted net loss per share, subject to meeting the criteria for using the treasury stock method in future periods. The Convertible Notes would have a dilutive impact on net income per share when the average market price of Class A common stock for a given period exceeds the conversion price of the Convertible Notes. For the periods presented, our potentially dilutive shares relating to stock options, RSUs, RSAs, Convertible Notes, and common stock subject to repurchase were not included in the computation of diluted net loss per share as the effect of including these shares in the calculation would have been anti-dilutive. The numerators and denominators of the basic and diluted net loss per share computations for our common stock are calculated as follows for the three and nine months ended September 30, 2019 and 2018: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (in thousands, except per share data) Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Class A Common (3) Class B Common (1) Class C Common (2) Numerator: Net loss $ (181,409 ) $ (6,308 ) $ (39,658 ) $ (240,299 ) $ (23,423 ) $ (61,426 ) $ (622,641 ) $ (28,223 ) $ (142,092 ) $ (777,184 ) $ (79,652 ) $ (207,407 ) Net loss attributable to common stockholders $ (181,409 ) $ (6,308 ) $ (39,658 ) $ (240,299 ) $ (23,423 ) $ (61,426 ) $ (622,641 ) $ (28,223 ) $ (142,092 ) $ (777,184 ) $ (79,652 ) $ (207,407 ) Denominator: Basic shares: Weighted-average common shares – Basic 1,111,678 38,658 243,022 968,090 94,364 247,464 1,071,290 48,559 244,478 932,767 95,598 248,928 Diluted shares: Weighted-average common shares – Diluted 1,111,678 38,658 243,022 968,090 94,364 247,464 1,071,290 48,559 244,478 932,767 95,598 248,928 Net loss per share attributable to common stockholders: Basic $ (0.16 ) $ (0.16 ) $ (0.16 ) $ (0.25 ) $ (0.25 ) $ (0.25 ) $ (0.58 ) $ (0.58 ) $ (0.58 ) $ (0.83 ) $ (0.83 ) $ (0.83 ) Diluted $ (0.16 ) $ (0.16 ) $ (0.16 ) $ (0.25 ) $ (0.25 ) $ (0.25 ) $ (0.58 ) $ (0.58 ) $ (0.58 ) $ (0.83 ) $ (0.83 ) $ (0.83 ) The following potentially dilutive shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented: Three and Nine Months Ended September 30, 2019 2018 (in thousands) Stock options 10,892 16,999 Unvested RSUs and RSAs 159,990 141,179 Convertible Notes (if-converted) 55,468 —

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stockholders' Equity	4. Stockholders’ Equity We maintain three share-based employee compensation plans: the 2017 Equity Incentive Plan (“2017 Plan”), the 2014 Equity Incentive Plan (“2014 Plan”), and the 2012 Equity Incentive Plan (“2012 Plan”, and collectively with the 2017 Plan and the 2014 Plan, the “Stock Plans”). In January 2017, our board of directors adopted the 2017 Plan, and in February 2017 our stockholders approved the 2017 Plan, effective on March 1, 2017, which serves as the successor to the 2014 Plan and 2012 Plan and provides for the grant of incentive stock options to employees, including employees of any parent or subsidiary, and for the grant of nonstatutory stock options, stock appreciation rights, RSAs, RSUs, performance stock awards, performance cash awards, and other forms of stock awards to employees, directors, and consultants, including employees and consultants of our affiliates. Restricted Stock Units The following table summarizes the RSU activity during the nine months ended September 30, 2019: Class A Outstanding RSUs Class B Outstanding RSUs Weighted- Average Grant Date Fair Value per RSU (in thousands, except per share data) Unvested at December 31, 2018 149,638 492 $ 13.34 Granted 81,560 — $ 10.66 Vested (60,577 ) (490 ) $ 11.76 Forfeited (19,431 ) (2 ) $ 13.22 Unvested at September 30, 2019 151,190 — $ 12.55 RSUs granted to employees before January 1, 2017 (“Pre-2017 RSUs”) included both service-based and performance conditions to vest in the underlying common stock. The performance condition related to Pre-2017 RSUs was satisfied on the effectiveness of the registration statement for our IPO, which occurred in March 2017. Total unrecognized compensation cost related to Pre-2017 RSUs was $60.4 million as of September 30, 2019 and is expected to be recognized over a weighted-average period of 1.0 years. All RSUs granted after December 31, 2016 vest on the satisfaction of only a service-based condition (“Post-2017 RSUs”). Total unrecognized compensation cost related to Post-2017 RSUs was $1.4 billion as of September 30, 2019 and is expected to be recognized over a weighted-average period of 3.0 years. The service condition for Post-2017 RSUs granted prior to February 2018 is generally satisfied over four years, 10% after the first year of service, 20% over the second year, 30% over the third year, and 40% over the fourth year. In limited instances, we have issued Post-2017 RSUs with vesting periods in excess of four years. The service condition for Post-2017 RSUs granted after February 2018 is generally satisfied in equal monthly or quarterly installments over four years. Additionally, we had 13.7 million and 22.4 million RSUs that were vested but have not yet settled as of September 30, 2019 and December 31, 2018, respectively. These RSUs are primarily related to the CEO award. Restricted Stock Awards The following table summarizes the RSA activity during the nine months ended September 30, 2019: Class A Outstanding RSAs Weighted- Average Grant Date Fair Value per RSA (in thousands, except per share data) Unvested at December 31, 2018 8,134 $ 7.51 Granted 3,975 $ 12.61 Vested (2,160 ) $ 10.16 Forfeited (1,149 ) $ 5.85 Unvested at September 30, 2019 8,800 $ 9.39 Total unrecognized compensation cost related to RSAs was $80.0 million as of September 30, 2019 and is expected to be recognized over a weighted-average period of 3.5 years. Stock Options The following table summarizes the stock option award activity under the Stock Plans during the nine months ended September 30, 2019: Class A Number of Shares Class B Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (1) (in thousands, except per share data) Outstanding at December 31, 2018 13,322 2,969 $ 7.83 6.41 $ 34,567 Granted 118 — $ 14.69 — $ — Exercised (3,024 ) (1,162 ) $ 3.52 — $ — Forfeited (1,302 ) (29 ) $ 13.88 — $ — Outstanding at September 30, 2019 9,114 1,778 $ 8.82 5.80 $ 76,421 (1) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the closing market price of our Class A common stock as of December 31, 2018 and September 30, 2019, respectively. Total unrecognized compensation cost related to unvested stock options was $23.0 million as of September 30, 2019 Stock-Based Compensation Expense by Function Total stock-based compensation expense by function was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (in thousands) Cost of revenue $ 1,332 $ 1,368 $ 4,967 $ 3,111 Research and development 108,176 95,329 353,028 265,447 Sales and marketing 23,333 25,082 67,567 63,264 General and administrative 28,387 5,030 93,796 84,617 Total $ 161,228 $ 126,809 $ 519,358 $ 416,439

Business Acquisitions and Dives

Business Acquisitions and Divestitures	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Business Acquisitions and Divestitures	Placed, LLC In June 2019, we divested our membership interest in Placed, LLC (“Placed”) to Foursquare Labs, Inc. (“Foursquare”). The total cash consideration received was $77.8 million, which includes amounts paid for severance and equity compensation. The remaining $66.9 million represents purchase consideration and we recognized a net gain on divestiture of $39.9 million, which is included in Other income (expense), net, on our consolidated statements of operations. The operating results of Placed were not material to our consolidated revenue or consolidated operating loss for all periods presented. We determined that Placed did not meet the criteria to be classified as discontinued operations. Placed assets and liabilities on completion of the divestiture were as follows: Total (in thousands) Trademarks, net $ 1,052 Technology, net 14,193 Customer relationships, net 5,246 Goodwill 2,682 Other assets and liabilities, net 3,827 Total $ 27,000

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Intangible Assets	6. Goodwill and Intangible Assets The changes in the carrying amount of goodwill for the nine months ended September 30, 2019 were as follows: Goodwill (in thousands) Balance as of December 31, 2018 $ 632,370 Foreign currency translation (7,930 ) Divestitures (2,682 ) Balance as of September 30, 2019 $ 621,758 Intangible assets consisted of the following: September 30, 2019 Weighted- Average Remaining Useful Life - Years Gross Carrying Amount Accumulated Amortization Net (in thousands, except years) Domain names 2.1 $ 5,414 $ 5,096 $ 318 Trademarks — 3,072 3,072 — Acquired developed technology 3.3 148,298 89,189 59,109 Customer relationships — 2,172 2,172 — Patents 6.2 19,710 6,766 12,944 $ 178,666 $ 106,295 $ 72,371 December 31, 2018 Weighted- Average Remaining Useful Life - Years Gross Carrying Amount Accumulated Amortization Net (in thousands except years) Domain names 1.6 5,414 $ 4,283 $ 1,131 Trademarks 1.4 5,772 4,076 1,696 Acquired developed technology 3.8 179,791 78,729 101,062 Customer relationships 2.1 15,572 8,012 7,560 Patents 6.9 19,710 5,105 14,605 $ 226,259 $ 100,205 $ 126,054 Amortization of intangible assets was $6.9 million and $10.6 million for the three months ended September 30, 2019 and 2018, respectively, and $26.3 million and $32.2 million for the nine months ended September 30, 2019 and 2018, respectively. As of September 30, 2019, the estimated intangible asset amortization expense for the next five years and thereafter is as follows: Estimated Amortization (in thousands) Remainder of 2019 $ 6,546 2020 23,028 2021 17,404 2022 10,810 2023 8,378 Thereafter 6,205 Total $ 72,371

Convertible Notes

Convertible Notes	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Convertible Notes	7. Convertible Notes In August 2019, we entered into a purchase agreement with certain counterparties for the sale of an aggregate of $1.265 billion principal amount of the Convertible Notes in a private offering to qualified institutional buyers pursuant to Rule 144A under the Securities Act of 1933, as amended (the “Securities Act”). The Convertible Notes consisted of a $1.1 billion initial placement and an over-allotment option that provided the initial purchasers of the Convertible Notes with the option to purchase an additional $165.0 million aggregate principal amount of the Convertible Notes, which was fully exercised. The Convertible Notes were issued pursuant to an Indenture, dated August 9, 2019 (the “Indenture”). The net proceeds from the issuance of the Convertible Notes were $1.15 billion, net of debt issuance costs and cash used to purchase the capped call transactions (“Capped Call Transactions”), discussed below. The Convertible Notes are unsecured and unsubordinated obligations. Interest is payable in cash semi-annually in arrears beginning on February 1, 2020 at a rate of 0.75% per year. The Convertible Notes mature on August 1, 2026 unless repurchased, redeemed, or converted in accordance with the terms prior to such date. The Convertible Notes are convertible into cash, shares of our Class A common stock, or a combination of cash and shares of our Class A common stock, at our election, at an initial conversion rate of 43.8481 shares of Class A common stock per $1,000 principal amount of Convertible Notes, which is equivalent to an initial conversion price of approximately $22.81 (the “Conversion Price”) per share of our Class A common stock. The conversion rate is subject to customary adjustments for certain events as described in the Indenture. We may redeem for cash all or any portion of the Convertible Notes, at our option, on or after August 6, 2023 if the last reported sale price of our Class A common stock has been at least 130% of the Conversion Price then in effect for at least 20 trading days at a redemption price equal to 100% of the principal amount of the Convertible Notes to be redeemed, plus accrued and unpaid interest. Holders of the Convertible Notes may convert all or a portion of their Convertible Notes at their option prior to May 1, 2026, in multiples of $1,000 principal amounts, only under the following circumstances: • during any calendar quarter commencing after December 31, 2019, if the last reported sale price of Class A common stock for at least 20 trading days (whether or not consecutive) during the period of 30 consecutive trading days ending on the last trading day of the preceding calendar quarter is greater than or equal to 130% of the applicable conversion price of the Convertible Notes on each such trading day; • during the five business day period after any ten consecutive trading day period in which the trading price per $1,000 principal amount of the Convertible Notes for each day of that ten day consecutive trading day period was less than 98% of the product of the last reported sale price of Class A common stock and the applicable conversion rate of the Convertible Notes on such trading day; • on a notice of redemption, in which case we may be required to increase the conversion rate for the Convertible Notes so surrendered for conversion in connection with such redemption notice; or • on the occurrence of specified corporate events. On or after May 1, 2026, the Convertible Notes are convertible at any time until the close of business on the second scheduled trading day immediately preceding the maturity date. Holders of the Convertible Notes who convert in connection with a make-whole fundamental change, as defined in the Indenture, or in connection with a redemption are entitled to an increase in the conversion rate. Additionally, in the event of a fundamental change, holders of the Convertible Notes may require us to repurchase all or a portion of the Convertible Notes at a price equal to 100% of the principal amount of Convertible Notes, plus any accrued and unpaid interest, including any additional interest. In accounting for the issuance of the Convertible Notes, we separated the Convertible Notes into liability and equity components. The carrying amount of the equity component was $381.5 million and was recorded as a debt discount, which is amortized to interest expense at an effective interest rate of 6.22%. We allocated $4.1 million of debt issuance costs to the equity component and the remaining debt issuance costs of $9.5 million were allocated to the liability component, which are amortized to interest expense under the effective interest rate method. The equity component of the Convertible Notes will not be remeasured as long as it continues to meet the conditions for equity classification. The Convertible Amount (in thousands) Liability: Principal $ 1,265,000 Unamortized debt discount and issuance costs (384,609 ) Net carrying amount $ 880,391 Carrying amount of the equity component $ 377,432 As of September 30, 2019, the debt discount and debt issuance costs on the Convertible Notes will be amortized over the remaining period of approximately 6.8 years. The following table details interest expense recognized related to the Convertible Notes for the three months ended September 30, 2019: Amount (in thousands) Contractual interest expense $ 1,352 Amortization of debt issuance costs 156 Amortization of debt discount 6,256 Total $ 7,764 As of September 30, 2019, the if-converted value of the Convertible Notes did not exceed the principal amount. Capped Call Transactions In connection with the pricing of the Convertible Notes, we entered into separate Capped Call Transactions with certain counterparties at a net cost of $102.1 million. The cap price of the Capped Call Transactions is initially $32.58 per share of our Class A common stock, representing a premium of 100% above the last reported sale price of $16.29 per share of our Class A common stock on August 6, 2019, and is subject to certain adjustments under the terms of the Capped Call Transactions. Conditions that cause adjustments to the initial strike price of the Capped Call Transactions mirror conditions that result in corresponding adjustments for the Convertible Notes. The Capped Call Transactions are intended to reduce potential dilution to holders of our Class A common stock beyond the conversion price of $22.81, up to $32.58 on any conversion of the Convertible Notes or offset any cash payments we are required to make in excess of the principal amount of such converted Convertible Notes, as the case may be, with such reduction or offset subject to a cap. The cost of the Capped Call Transactions was recorded as a reduction of our additional paid-in capital in our consolidated balance sheets.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	8. Commitments and Contingencies Commitments We have non-cancelable contractual agreements related to the hosting of our data storage processing, storage, and other computing services. In January 2017, we entered into the Google Cloud Platform License Agreement, which was amended in September 2017, December 2017, January 2018, November 2018, April 2019, and September 2019. Under the agreement, we were granted a license to access and use certain cloud services. The agreement has an initial term of five years and we are required to purchase at least $400.0 million of cloud services in each year of the agreement. For each of the first four years, up to 15% of this amount may be moved to a subsequent year. If we fail to meet the minimum purchase commitment during any year, we are required to pay the difference. In March 2016, we entered into the AWS Enterprise Agreement for the use of cloud services from Amazon Web Services, Inc. (“AWS”), which was amended in March 2016 and again in February 2017. The agreement will continue indefinitely until terminated by either party. Under the February 2017 addendum to the agreement, we committed to spend $1.0 billion between January 2017 and December 2021. That addendum was amended in October 2018, and we are now committed to spend an aggregate of $1.1 billion between January 2017 and December 2022 on AWS services ($90.0 million in 2018, $150.0 million in 2019, $215.0 million in 2020, $280.0 million in 2021, and $349.0 million in 2022). If we fail to meet the minimum purchase commitment during any year, we are required to pay the difference. Any such payment may be applied to future use of AWS services during the addendum term, although it will not count towards meeting the future minimum purchase commitments under the addendum. The future minimum contractual commitment including commitments less than one year, as of September 30, 2019, for each of the next five years are as follows: Minimum Commitment (in thousands) Remainder of 2019 $ 158,192 2020 633,017 2021 683,245 2022 383,713 2023 - Thereafter - Total minimum commitments $ 1,858,167 Contingencies We record a loss contingency when it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. We also disclose material contingencies when we believe a loss is not probable but reasonably possible. Accounting for contingencies requires us to use judgment related to both the likelihood of a loss and the estimate of the amount or range of loss. Many legal and tax contingencies can take years to be resolved. Pending Matters Beginning in May 2017, we, certain of our officers and directors, and the underwriters for our IPO were named as defendants in securities class actions purportedly brought on behalf of purchasers of our Class A common stock, alleging violation of securities laws in connection with our IPO. Management believes these lawsuits are without merit and intend to vigorously defend them. Based on the preliminary nature of the proceedings in this case, the outcome of this matter remains uncertain. On April 3, 2018, BlackBerry Limited filed a lawsuit against us alleging that we infringe six of its patents. We are currently investigating BlackBerry’s allegations, and management believes we have meritorious defenses. Based on the preliminary nature of the proceedings, the outcome of this matter remains uncertain. In 2017, Vaporstream, Inc. filed a lawsuit against us alleging that we infringe a number of its patents. We filed a motion to dismiss, which the court denied without prejudice to re-file after further factual development. Later in 2017, we filed a motion for summary judgment. On February 27, 2018, the court issued an order denying our motion for summary judgment. On June 13, 2018, the court stayed the lawsuit pending the outcome of several challenges to the validity of the patents, filed by us at the U.S. Patent and Trademark Office (“USPTO”). On September 13, 2019, the court removed the stay with respect to several of Vaporstream's patents that the USPTO determined were not shown to be unpatentable. A t rial date has been set for early 2020. While management believes we have meritorious defenses to Vaporstream’s claims, the outcome of this matter remains uncertain. The outcomes of our legal proceedings are inherently unpredictable, subject to significant uncertainties, and could be material to our financial condition, results of operations, and cash flows for a particular period. For the pending matters described above, it is not possible to estimate the reasonably possible loss or range of loss. We are subject to various other legal proceedings and claims in the ordinary course of business, including certain patent, trademark, privacy, regulatory, and employment matters. Although occasional adverse decisions or settlements may occur, we do not believe that the final disposition of any of our other pending matters will seriously harm our business, financial condition, results of operations, and cash flows. Indemnifications In the ordinary course of business, we may provide indemnifications of varying scope and terms to customers, vendors, lessors, investors, directors, officers, employees, and other parties with respect to certain matters. Indemnification may include losses from our breach of such agreements, services we provide, or third party intellectual property infringement claims. These indemnifications may survive termination of the underlying agreement and the maximum potential amount of future indemnification payments may not be subject to a cap. We have not incurred material costs to defend lawsuits or settle claims related to these indemnifications as of September 30, 2019. We believe the fair value of these liabilities is immaterial and accordingly have no liabilities recorded for these agreements at September 30, 2019.

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	9. Leases We have various non-cancelable lease agreements for certain of our offices with original lease periods expiring between 2019 and 2029. Our lease terms may include options to extend or terminate the lease when it is reasonably certain we will exercise that option. Certain of the arrangements have free rent periods or escalating rent payment provisions. Leases with an initial term of twelve months or less are not recorded on the consolidated balance sheets. We recognize rent expense on a straight-line basis over the lease term. Additionally, we sublease certain operating leases to third parties primarily as a result of moving to a centralized corporate office in Santa Monica, California in 2018. Lease Cost The components of lease cost were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2019 (in thousands) Operating lease expense $ 14,442 $ 46,313 Sublease income (1,287 ) (3,480 ) Total net lease costs $ 13,155 $ 42,833 Lease Term and Discount Rate The weighted-average remaining lease term (in years) and discount rate related to the operating leases were as follows: September 30, 2019 Weighted-average remaining lease term 6.8 Weighted-average discount rate 6.1 % As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at the lease commencement date to determine the present value of lease payments. Maturity of Lease Liabilities The present value of our operating lease liabilities as of September 30, 2019 were as follows: Operating Leases (in thousands) Remainder of 2019 $ 16,260 2020 69,071 2021 64,922 2022 56,315 2023 52,166 Thereafter 152,266 Total lease payments $ 411,000 Less: Imputed interest (76,477 ) Present value of lease liabilities $ 334,523 As of September 30, 2019, we have additional operating leases for facilities that have not yet commenced with lease obligations of $14.2 million. These operating leases will commence between 2019 and 2021 with lease terms of greater than one years to five years. This table does not include lease payments that were not fixed at commencement or modification. In 2018, we exited various operating leases prior to the end of the contractual lease term, primarily as a result of moving to a centralized corporate office located in Santa Monica, California. The charges, recorded as general and administrative expenses, primarily included the present value of our remaining lease obligation on the cease use dates that occurred during the period, net of estimated sublease income. As of December 31, 2018, we exited all properties associated with this event. On January 1, 2019, under the transition provisions of ASU 2016-02 (Topic 842), we adjusted the initial measurement of the lease asset related to the lease exit properties by $32.1 million which represents the carrying amount of the associated lease exit liability as of December 31, 2018. Changes to our estimated sublease income, including actual contracted sublease income, may result in impairment of the right-of-use asset in the period determined. Prior to January 1, 2019, we had several lease agreements where we were deemed the owner under build-to-suit lease accounting. The value of the leased property and corresponding financing obligations was included in property and equipment, net and other liabilities, respectively, on our consolidated balance sheets as of December 31, 2018. Net assets capitalized under build-to-suit leases were $48.4 million as of December 31, 2018. As part of the adoption of Topic 842, we derecognized those assets and liabilities and recorded the difference as an adjustment to accumulated deficit at January 1, 2019. These leases are included within the right-of-use asset and lease liability balances on our consolidated balance sheet as of September 30, 2019. Other Information Cash payments included in the measurement of our o perating lease liabilities were $16.2 million and $49.4 million for the three and nine months ended September 30, 2019, respectively Lease liabilities arising from obtaining operating lease right-of-use assets was $13.3 million for the nine months ended September 30, 2019, respectively.

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Fair Value Measurements	10. Fair Value Measurements Assets and liabilities measured at fair value are classified into the following categories: • Level 1: Quoted market prices in active markets for identical assets or liabilities. • Level 2: Observable market-based inputs or unobservable inputs that are corroborated by market data. • Level 3: Unobservable inputs reflecting the reporting entity’s own assumptions or external inputs from inactive markets. We classify our cash equivalents and marketable securities within Level 1 or Level 2 because we use quoted market prices or alternative pricing sources and models utilizing market observable inputs to determine their fair value. There were no transfers between levels during the periods presented. The following tables set forth our financial assets as of September 30, 2019 and December 31, 2018 that are measured at fair value on a recurring basis during the period: September 30, 2019 Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Total Estimated Fair Value (in thousands) Cash $ 468,196 $ — $ — $ 468,196 Level 1 securities: U.S. government securities 1,314,132 522 (91 ) 1,314,563 U.S. government agency securities 351,511 27 (29 ) 351,509 Level 2 securities: Corporate debt securities 31,457 41 — 31,498 Commercial paper 72,726 2 — 72,728 Certificates of deposit 22,236 — — 22,236 Total $ 2,260,258 $ 592 $ (120 ) $ 2,260,730 December 31, 2018 Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Total Estimated Fair Value (in thousands) Cash $ 279,950 $ — $ — $ 279,950 Level 1 securities: U.S. government securities 735,988 12 (175 ) 735,825 U.S. government agency securities 181,032 4 (36 ) 181,000 Level 2 securities: Corporate debt securities 35,819 1 (18 ) 35,802 Commercial paper 33,193 — — 33,193 Certificates of deposit 13,293 — — 13,293 Total $ 1,279,275 $ 17 $ (229 ) $ 1,279,063 Gross unrealized losses in a continuous loss position for 12 months or longer are not material as of September 30, 2019 and December 31, 2018, respectively. As of September 30, 2019, we considered any decreases in market value on our marketable securities to be temporary in nature and did not consider any of our investments to be other-than-temporarily impaired. All of our marketable securities have contractual maturities of less than one year. W e carry the Convertible Notes at face value less the unamortized discount and issuance costs on our consolidated balance sheets and present that fair value for disclosure purposes only. As of September 30, 2019, the fair value of the Convertible Notes was $1.3 billion. The estimated fair value of the Convertible Notes, which are classified as Level 2 financial instruments, was determined based on the estimated or actual bid prices of the Convertible Notes in an over-the-counter market on the last business day of the period.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes Our tax provision for interim periods is determined using an estimate of our annual effective tax rate, adjusted for discrete items arising in that quarter. Our effective tax rate differs from the U.S. statutory tax rate primarily due to valuation allowances on our deferred tax assets as it is more likely than not that some or all of our deferred tax assets will not be realized. Income taxes were a benefit of $1.3 million and an expense of $0.1 million for the three and nine months ended September 30, 2019, respectively, compared to a tax expense of $0.2 million and $2.9 million for the three and nine months ended September 30, 2018, respectively.

Accumulated Other Comprehensive

Accumulated Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income Loss [Abstract]
Accumulated Other Comprehensive Income (Loss)	12. Accumulated Other Comprehensive Income (Loss) The table below presents the changes in accumulated other comprehensive income (loss) (“AOCI”) by component and the reclassifications out of AOCI: Changes in Accumulated Other Comprehensive Income (Loss) by Component Marketable Securities Foreign Currency Translation Total (in thousands) Balance at December 31, 2018 $ (368 ) $ 3,515 $ 3,147 OCI before reclassifications (1) 564 (10,929 ) (10,365 ) Amounts reclassified from AOCI (2) 45 — 45 Net current period OCI 609 (10,929 ) (10,320 ) Balance at September 30, 2019 $ 241 $ (7,414 ) $ (7,173 ) (1) Net of tax expense of $0.2 million for gains / losses on marketable securities. (2) Realized gains and losses on marketable securities are reclassified from AOCI into other income (expense), net in the consolidated statements of operations.

Property and Equipment, Net

Property and Equipment, Net	9 Months Ended
	Sep. 30, 2019
Property Plant And Equipment [Abstract]
Property and Equipment, Net	13. Property and Equipment, Net The following table lists property and equipment, net by geographic area: As of September 30, 2019 As of December 31, 2018 (in thousands) Property and equipment, net: United States $ 158,719 $ 190,412 Rest of world (1) 18,354 22,148 Total property and equipment, net $ 177,073 $ 212,560 (1) No

Description of Business and S_2

Description of Business and Summary of Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited consolidated financial statements are prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information. Our consolidated financial statements include the accounts of Snap Inc. and our wholly owned subsidiaries. All intercompany transactions and balances have been eliminated in consolidation. Our fiscal year ends on December 31. These unaudited interim consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes included in our Annual Report on Form 10-K for the fiscal year ended December 31, 2018, as filed with the SEC on February 6, 2019 (the “Annual Report”). In our opinion, the unaudited interim consolidated financial statements include all adjustments of a normal recurring nature necessary for the fair presentation of our financial position, results of operations, and cash flows. The results of operations for the three and nine months ended September 30, 2019 are not necessarily indicative of the results to be expected for the year ending December 31, 2019. Other than described below, there have been no changes to our significant accounting policies described in our Annual Report that have had a material impact on our consolidated financial statements and related notes.
Use of Estimates	Use of Estimates The preparation of our consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts in the consolidated financial statements. Management’s estimates are based on historical information available as of the date of the consolidated financial statements and various other assumptions that we believe are reasonable under the circumstances. Actual results could differ from those estimates. Key estimates relate primarily to determining the fair value of assets and liabilities assumed in business combinations, evaluation of contingencies, uncertain tax positions, excess inventory reserves, lease exit charges, forfeiture rate, the fair value of convertible senior notes, and the fair value of stock-based awards. On an ongoing basis, management evaluates our estimates compared to historical experience and trends, which form the basis for making judgments about the carrying value of assets and liabilities.
Convertible Notes	Convertible Notes We account for the convertible senior notes (“Convertible Notes”) as separate liability and equity components. The carrying amount of the liability component is calculated by measuring the fair value of a similar liability that does not have an associated convertible feature. The carrying amount of the equity component, representing the conversion option, is calculated by deducting the fair value of the liability component from the total principal of the Convertible Notes. This amount represents a debt discount which is amortized to interest expense over the term of the Convertible Notes using the effective interest rate method, which maintains a constant rate of interest expense based on the increasing carrying value of the debt.
Recent Accounting Pronouncements	Recent Accounting Pronouncements In August 2018, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“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 In June 2016, the FASB issued ASU 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842)

Revenue (Tables)

Revenue (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue From Contract With Customer [Abstract]
Disaggregation of Revenue by Geography	The following table represents our revenue disaggregated by geography based on the billing address of the advertising customer: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (in thousands) Revenue: North America (1) (2) $ 280,072 $ 196,320 $ 713,822 $ 534,878 Europe (3) 78,967 49,033 202,997 120,364 Rest of world (4) 87,160 52,342 237,827 135,382 Total revenue $ 446,199 $ 297,695 $ 1,154,646 $ 790,624 (1) North America includes Mexico, the Caribbean, and Central America. (2) United States revenue was $269.2 million and $188.5 million for the three months ended September 30, 2019 and 2018, respectively, and $685.3 million and $515.4 million for the nine months ended September 30, 2019 and 2018, respectively. (3) Europe includes Russia and Turkey. (4) Greater China revenue was $44.8 million for the three months ended September 30, 2019.

Net Loss per Share (Tables)

Net Loss per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Numerators and Denominators of Basic and Diluted Net Loss per Share Computations for Common Stock	The numerators and denominators of the basic and diluted net loss per share computations for our common stock are calculated as follows for the three and nine months ended September 30, 2019 and 2018: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (in thousands, except per share data) Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Class A Common Class B Common Class C Common Class A Common (3) Class B Common (1) Class C Common (2) Numerator: Net loss $ (181,409 ) $ (6,308 ) $ (39,658 ) $ (240,299 ) $ (23,423 ) $ (61,426 ) $ (622,641 ) $ (28,223 ) $ (142,092 ) $ (777,184 ) $ (79,652 ) $ (207,407 ) Net loss attributable to common stockholders $ (181,409 ) $ (6,308 ) $ (39,658 ) $ (240,299 ) $ (23,423 ) $ (61,426 ) $ (622,641 ) $ (28,223 ) $ (142,092 ) $ (777,184 ) $ (79,652 ) $ (207,407 ) Denominator: Basic shares: Weighted-average common shares – Basic 1,111,678 38,658 243,022 968,090 94,364 247,464 1,071,290 48,559 244,478 932,767 95,598 248,928 Diluted shares: Weighted-average common shares – Diluted 1,111,678 38,658 243,022 968,090 94,364 247,464 1,071,290 48,559 244,478 932,767 95,598 248,928 Net loss per share attributable to common stockholders: Basic $ (0.16 ) $ (0.16 ) $ (0.16 ) $ (0.25 ) $ (0.25 ) $ (0.25 ) $ (0.58 ) $ (0.58 ) $ (0.58 ) $ (0.83 ) $ (0.83 ) $ (0.83 ) Diluted $ (0.16 ) $ (0.16 ) $ (0.16 ) $ (0.25 ) $ (0.25 ) $ (0.25 ) $ (0.58 ) $ (0.58 ) $ (0.58 ) $ (0.83 ) $ (0.83 ) $ (0.83 )
Schedule of Potentially Dilutive Shares Excluded from Calculation of Diluted Net Loss per Share	The following potentially dilutive shares were excluded from the calculation of diluted net loss per share because their effect would have been anti-dilutive for the periods presented: Three and Nine Months Ended September 30, 2019 2018 (in thousands) Stock options 10,892 16,999 Unvested RSUs and RSAs 159,990 141,179 Convertible Notes (if-converted) 55,468 —

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2019
Summary of Stock Option Award Activity	The following table summarizes the stock option award activity under the Stock Plans during the nine months ended September 30, 2019: Class A Number of Shares Class B Number of Shares Weighted- Average Exercise Price Weighted- Average Remaining Contractual Term (in years) Aggregate Intrinsic Value (1) (in thousands, except per share data) Outstanding at December 31, 2018 13,322 2,969 $ 7.83 6.41 $ 34,567 Granted 118 — $ 14.69 — $ — Exercised (3,024 ) (1,162 ) $ 3.52 — $ — Forfeited (1,302 ) (29 ) $ 13.88 — $ — Outstanding at September 30, 2019 9,114 1,778 $ 8.82 5.80 $ 76,421 (1) The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the closing market price of our Class A common stock as of December 31, 2018 and September 30, 2019, respectively.
Summary of Total Stock-based Compensation Expense	Total stock-based compensation expense by function was as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2018 2019 2018 (in thousands) Cost of revenue $ 1,332 $ 1,368 $ 4,967 $ 3,111 Research and development 108,176 95,329 353,028 265,447 Sales and marketing 23,333 25,082 67,567 63,264 General and administrative 28,387 5,030 93,796 84,617 Total $ 161,228 $ 126,809 $ 519,358 $ 416,439
Restricted Stock Units
Summary of RSU and RSA Award Activity	Restricted Stock Units The following table summarizes the RSU activity during the nine months ended September 30, 2019: Class A Outstanding RSUs Class B Outstanding RSUs Weighted- Average Grant Date Fair Value per RSU (in thousands, except per share data) Unvested at December 31, 2018 149,638 492 $ 13.34 Granted 81,560 — $ 10.66 Vested (60,577 ) (490 ) $ 11.76 Forfeited (19,431 ) (2 ) $ 13.22 Unvested at September 30, 2019 151,190 — $ 12.55
Restricted Stock Awards
Summary of RSU and RSA Award Activity	The following table summarizes the RSA activity during the nine months ended September 30, 2019: Class A Outstanding RSAs Weighted- Average Grant Date Fair Value per RSA (in thousands, except per share data) Unvested at December 31, 2018 8,134 $ 7.51 Granted 3,975 $ 12.61 Vested (2,160 ) $ 10.16 Forfeited (1,149 ) $ 5.85 Unvested at September 30, 2019 8,800 $ 9.39

Business Acquisitions and Div_2

Business Acquisitions and Divestitures (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Summary of Assets and Liabilities on Completion of Divestiture	Placed assets and liabilities on completion of the divestiture were as follows: Total (in thousands) Trademarks, net $ 1,052 Technology, net 14,193 Customer relationships, net 5,246 Goodwill 2,682 Other assets and liabilities, net 3,827 Total $ 27,000

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill And Intangible Assets Disclosure [Abstract]
Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill for the nine months ended September 30, 2019 were as follows: Goodwill (in thousands) Balance as of December 31, 2018 $ 632,370 Foreign currency translation (7,930 ) Divestitures (2,682 ) Balance as of September 30, 2019 $ 621,758
Schedule of Intangible Assets	Intangible assets consisted of the following: September 30, 2019 Weighted- Average Remaining Useful Life - Years Gross Carrying Amount Accumulated Amortization Net (in thousands, except years) Domain names 2.1 $ 5,414 $ 5,096 $ 318 Trademarks — 3,072 3,072 — Acquired developed technology 3.3 148,298 89,189 59,109 Customer relationships — 2,172 2,172 — Patents 6.2 19,710 6,766 12,944 $ 178,666 $ 106,295 $ 72,371 December 31, 2018 Weighted- Average Remaining Useful Life - Years Gross Carrying Amount Accumulated Amortization Net (in thousands except years) Domain names 1.6 5,414 $ 4,283 $ 1,131 Trademarks 1.4 5,772 4,076 1,696 Acquired developed technology 3.8 179,791 78,729 101,062 Customer relationships 2.1 15,572 8,012 7,560 Patents 6.9 19,710 5,105 14,605 $ 226,259 $ 100,205 $ 126,054
Schedule of Estimated Intangible Asset Amortization Expense	As of September 30, 2019, the estimated intangible asset amortization expense for the next five years and thereafter is as follows: Estimated Amortization (in thousands) Remainder of 2019 $ 6,546 2020 23,028 2021 17,404 2022 10,810 2023 8,378 Thereafter 6,205 Total $ 72,371

Convertible Notes (Tables)

Convertible Notes (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Summary of Convertible Notes	The Convertible Amount (in thousands) Liability: Principal $ 1,265,000 Unamortized debt discount and issuance costs (384,609 ) Net carrying amount $ 880,391 Carrying amount of the equity component $ 377,432
Schedule of Interest Expense Recognized Related to Convertible Notes	The following table details interest expense recognized related to the Convertible Notes for the three months ended September 30, 2019: Amount (in thousands) Contractual interest expense $ 1,352 Amortization of debt issuance costs 156 Amortization of debt discount 6,256 Total $ 7,764

Commitments and Contingencies (

Commitments and Contingencies (Tables)	9 Months Ended
	Sep. 30, 2019
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Minimum Contractual Commitments	The future minimum contractual commitment including commitments less than one year, as of September 30, 2019, for each of the next five years are as follows: Minimum Commitment (in thousands) Remainder of 2019 $ 158,192 2020 633,017 2021 683,245 2022 383,713 2023 - Thereafter - Total minimum commitments $ 1,858,167

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Components of Lease Cost	The components of lease cost were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2019 2019 (in thousands) Operating lease expense $ 14,442 $ 46,313 Sublease income (1,287 ) (3,480 ) Total net lease costs $ 13,155 $ 42,833
Summary of Weighted Average Remaining Lease Term and Discount Rate Related to Operating Leases	Lease Term and Discount Rate The weighted-average remaining lease term (in years) and discount rate related to the operating leases were as follows: September 30, 2019 Weighted-average remaining lease term 6.8 Weighted-average discount rate 6.1 %
Present Value of Operating Lease Liabilities	Maturity of Lease Liabilities The present value of our operating lease liabilities as of September 30, 2019 were as follows: Operating Leases (in thousands) Remainder of 2019 $ 16,260 2020 69,071 2021 64,922 2022 56,315 2023 52,166 Thereafter 152,266 Total lease payments $ 411,000 Less: Imputed interest (76,477 ) Present value of lease liabilities $ 334,523

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 30, 2019
Fair Value Disclosures [Abstract]
Summary of Financial Assets Measured at Fair Value on Recurring Basis	The following tables set forth our financial assets as of September 30, 2019 and December 31, 2018 that are measured at fair value on a recurring basis during the period: September 30, 2019 Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Total Estimated Fair Value (in thousands) Cash $ 468,196 $ — $ — $ 468,196 Level 1 securities: U.S. government securities 1,314,132 522 (91 ) 1,314,563 U.S. government agency securities 351,511 27 (29 ) 351,509 Level 2 securities: Corporate debt securities 31,457 41 — 31,498 Commercial paper 72,726 2 — 72,728 Certificates of deposit 22,236 — — 22,236 Total $ 2,260,258 $ 592 $ (120 ) $ 2,260,730 December 31, 2018 Cost or Amortized Cost Gross Unrealized Gains Gross Unrealized Losses Total Estimated Fair Value (in thousands) Cash $ 279,950 $ — $ — $ 279,950 Level 1 securities: U.S. government securities 735,988 12 (175 ) 735,825 U.S. government agency securities 181,032 4 (36 ) 181,000 Level 2 securities: Corporate debt securities 35,819 1 (18 ) 35,802 Commercial paper 33,193 — — 33,193 Certificates of deposit 13,293 — — 13,293 Total $ 1,279,275 $ 17 $ (229 ) $ 1,279,063

Accumulated Other Comprehensi_2

Accumulated Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 30, 2019
Accumulated Other Comprehensive Income Loss [Abstract]
Schedule of Changes in Accumulated Other Comprehensive Income (Loss)	The table below presents the changes in accumulated other comprehensive income (loss) (“AOCI”) by component and the reclassifications out of AOCI: Changes in Accumulated Other Comprehensive Income (Loss) by Component Marketable Securities Foreign Currency Translation Total (in thousands) Balance at December 31, 2018 $ (368 ) $ 3,515 $ 3,147 OCI before reclassifications (1) 564 (10,929 ) (10,365 ) Amounts reclassified from AOCI (2) 45 — 45 Net current period OCI 609 (10,929 ) (10,320 ) Balance at September 30, 2019 $ 241 $ (7,414 ) $ (7,173 ) (1) Net of tax expense of $0.2 million for gains / losses on marketable securities. (2) Realized gains and losses on marketable securities are reclassified from AOCI into other income (expense), net in the consolidated statements of operations.

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	9 Months Ended
	Sep. 30, 2019
Property Plant And Equipment [Abstract]
Property and Equipment, Net by Geographic Area	The following table lists property and equipment, net by geographic area: As of September 30, 2019 As of December 31, 2018 (in thousands) Property and equipment, net: United States $ 158,719 $ 190,412 Rest of world (1) 18,354 22,148 Total property and equipment, net $ 177,073 $ 212,560 (1) No

Description of Business and S_3

Description of Business and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019
Summary Of Significant Accounting Policies [Line Items]
Operating lease right-of-use assets	$ 250,225
Operating lease, liability	$ 334,523
ASU 2016-02
Summary Of Significant Accounting Policies [Line Items]
Operating lease right-of-use assets		$ 284,500
Operating lease, liability		$ 375,400

Revenue - Disaggregation of Rev

Revenue - Disaggregation of Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Total revenue	$ 446,199	$ 297,695	$ 1,154,646	$ 790,624
North America
Disaggregation Of Revenue [Line Items]
Total revenue	280,072	196,320	713,822	534,878
Europe
Disaggregation Of Revenue [Line Items]
Total revenue	78,967	49,033	202,997	120,364
Rest of World
Disaggregation Of Revenue [Line Items]
Total revenue	$ 87,160	$ 52,342	$ 237,827	$ 135,382

Revenue - Disaggregation of R_2

Revenue - Disaggregation of Revenue by Geography (Parenthetical) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Total revenue	$ 446,199	$ 297,695	$ 1,154,646	$ 790,624
United States
Disaggregation Of Revenue [Line Items]
Total revenue	269,200	$ 188,500	$ 685,300	$ 515,400
Greater China
Disaggregation Of Revenue [Line Items]
Total revenue	$ 44,800

Net Loss per Share - Additional

Net Loss per Share - Additional Information (Details) - IPO shares in Millions	1 Months Ended
	Mar. 31, 2017shares
Class A Common Stock
Earnings Per Share [Line Items]
Common stock, shares issued and sold	160.3
Series FP Preferred Stock | Class C Common Stock | Chief Executive Officer | Restricted Stock Units
Earnings Per Share [Line Items]
Conversion of convertible preferred stock into common stock	37.4

Net Loss per Share - Numerators

Net Loss per Share - Numerators and Denominators of Basic and Diluted Net Loss per Share Computations for Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator:
Net loss	$ (227,375)	$ (325,148)	$ (792,956)	$ (1,064,243)
Basic shares:
Weighted-average common shares – Basic	1,393,358	1,309,918	1,364,327	1,277,293
Diluted shares:
Weighted-average common shares – Diluted	1,393,358	1,309,918	1,364,327	1,277,293
Net loss per share attributable to common stockholders:
Basic	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)
Diluted	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)
Class A Common Stock
Numerator:
Net loss	$ (181,409)	$ (240,299)	$ (622,641)	$ (777,184)
Net loss attributable to common stockholders	$ (181,409)	$ (240,299)	$ (622,641)	$ (777,184)
Basic shares:
Weighted-average common shares – Basic	1,111,678	968,090	1,071,290	932,767
Diluted shares:
Weighted-average common shares – Diluted	1,111,678	968,090	1,071,290	932,767
Net loss per share attributable to common stockholders:
Basic	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)
Diluted	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)
Class B Common Stock
Numerator:
Net loss	$ (6,308)	$ (23,423)	$ (28,223)	$ (79,652)
Net loss attributable to common stockholders	$ (6,308)	$ (23,423)	$ (28,223)	$ (79,652)
Basic shares:
Weighted-average common shares – Basic	38,658	94,364	48,559	95,598
Diluted shares:
Weighted-average common shares – Diluted	38,658	94,364	48,559	95,598
Net loss per share attributable to common stockholders:
Basic	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)
Diluted	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)
Class C Common Stock
Numerator:
Net loss	$ (39,658)	$ (61,426)	$ (142,092)	$ (207,407)
Net loss attributable to common stockholders	$ (39,658)	$ (61,426)	$ (142,092)	$ (207,407)
Basic shares:
Weighted-average common shares – Basic	243,022	247,464	244,478	248,928
Diluted shares:
Weighted-average common shares – Diluted	243,022	247,464	244,478	248,928
Net loss per share attributable to common stockholders:
Basic	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)
Diluted	$ (0.16)	$ (0.25)	$ (0.58)	$ (0.83)

Net Loss per Share - Schedule o

Net Loss per Share - Schedule of Potentially Dilutive Shares Excluded from Calculation of Diluted Net Loss per Share (Details) - shares shares in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from calculation of diluted net loss per share	10,892	16,999
Unvested Restricted Stock Units And Restricted Stock Awards Not Subject To A Performance Condition
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from calculation of diluted net loss per share	159,990	141,179
Convertible Notes (If-Converted)
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Anti-dilutive securities excluded from calculation of diluted net loss per share	55,468

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Details) shares in Millions, $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2019USD ($)Planshares	Dec. 31, 2018shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of share-based employee compensation plans | Plan	3
Pre-2017 RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 60.4
Weighted average recognition period	1 year
Post-2017 RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 1,400
Weighted average recognition period	3 years
Service condition satisfied, years	4 years
Post-2017 RSUs | First Year
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage	10.00%
Post-2017 RSUs | Second Year
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage	20.00%
Post-2017 RSUs | Third Year
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage	30.00%
Post-2017 RSUs | Fourth Year
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting percentage	40.00%
RSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
RSUs vested but not yet settled | shares	13.7	22.4
RSAs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized compensation cost	$ 80
Weighted average recognition period	3 years 6 months
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average recognition period	2 years
Unrecognized compensation cost related to stock options	$ 23

Stockholders' Equity - Summary

Stockholders' Equity - Summary of RSU and RSA Award Activity (Details) - $ / shares shares in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Restricted Stock Units
Outstanding Restricted Stock
Outstanding Restricted Stock, Vested	(13,700)	(22,400)
Weighted-Average Grant Date Fair Value per Restricted Stock
Weighted-Average Grant Date Fair Value per Restricted Stock, Unvested Beginning Balance	$ 13.34
Weighted-Average Grant Date Fair Value per Restricted Stock, Granted	10.66
Weighted-Average Grant Date Fair Value per Restricted Stock, Vested	11.76
Weighted-Average Grant Date Fair Value per Restricted Stock, Forfeited	13.22
Weighted-Average Grant Date Fair Value per Restricted Stock, Unvested Ending Balance	$ 12.55	$ 13.34
Restricted Stock Units | Class A Common Stock
Outstanding Restricted Stock
Outstanding Restricted Stock, Unvested Beginning Balance	149,638
Outstanding Restricted Stock, Granted	81,560
Outstanding Restricted Stock, Vested	(60,577)
Outstanding Restricted Stock, Forfeited	(19,431)
Outstanding Restricted Stock, Unvested Ending Balance	151,190	149,638
Restricted Stock Units | Class B Common Stock
Outstanding Restricted Stock
Outstanding Restricted Stock, Unvested Beginning Balance	492
Outstanding Restricted Stock, Vested	(490)
Outstanding Restricted Stock, Forfeited	(2)
Outstanding Restricted Stock, Unvested Ending Balance		492
Restricted Stock Awards
Weighted-Average Grant Date Fair Value per Restricted Stock
Weighted-Average Grant Date Fair Value per Restricted Stock, Unvested Beginning Balance	$ 7.51
Weighted-Average Grant Date Fair Value per Restricted Stock, Granted	12.61
Weighted-Average Grant Date Fair Value per Restricted Stock, Vested	10.16
Weighted-Average Grant Date Fair Value per Restricted Stock, Forfeited	5.85
Weighted-Average Grant Date Fair Value per Restricted Stock, Unvested Ending Balance	$ 9.39	$ 7.51
Restricted Stock Awards | Class A Common Stock
Outstanding Restricted Stock
Outstanding Restricted Stock, Unvested Beginning Balance	8,134
Outstanding Restricted Stock, Granted	3,975
Outstanding Restricted Stock, Vested	(2,160)
Outstanding Restricted Stock, Forfeited	(1,149)
Outstanding Restricted Stock, Unvested Ending Balance	8,800	8,134

Stockholders' Equity - Summar_2

Stockholders' Equity - Summary of Stock Option Award Activity (Details) - Stock Options - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Weighted-Average Exercise Price
Weighted-Average Exercise Price, Beginning balance	$ 7.83
Weighted-Average Exercise Price, Granted	14.69
Weighted-Average Exercise Price, Exercised	3.52
Weighted-Average Exercise Price, Forfeited	13.88
Weighted-Average Exercise Price, Ending balance	$ 8.82	$ 7.83
Weighted-Average Remaining Contractual Term
Weighted-Average Remaining Contractual Term (in years)	5 years 9 months 18 days	6 years 4 months 28 days
Aggregate Intrinsic Value
Aggregate Intrinsic Value, Outstanding	$ 34,567
Aggregate Intrinsic Value, Outstanding	$ 76,421	$ 34,567
Class A Common Stock
Number of Shares
Number of Shares, Beginning balance	13,322
Number of Shares, Granted	118
Number of Shares, Exercised	(3,024)
Number of Shares, Forfeited	(1,302)
Number of Shares, Ending balance	9,114	13,322
Class B Common Stock
Number of Shares
Number of Shares, Beginning balance	2,969
Number of Shares, Exercised	(1,162)
Number of Shares, Forfeited	(29)
Number of Shares, Ending balance	1,778	2,969

Stockholders' Equity - Summar_3

Stockholders' Equity - Summary of Total Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	$ 161,228	$ 126,809	$ 519,358	$ 416,439
Cost of Revenue
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	1,332	1,368	4,967	3,111
Research and Development
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	108,176	95,329	353,028	265,447
Sales and Marketing
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	23,333	25,082	67,567	63,264
General and Administrative
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total	$ 28,387	$ 5,030	$ 93,796	$ 84,617

Business Acquisitions and Div_3

Business Acquisitions and Divestitures - Additional Information (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Jun. 30, 2019	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal group including discontinued operation, purchase consideration		$ 0	$ 0	$ 73,796	$ 0
Placed, LLC
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal group including discontinued operation, cash consideration	$ 77,800
Disposal group including discontinued operation, purchase consideration	66,900
Placed, LLC | Other Income (Expense)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Disposal group including discontinued operation, net gain on disposal	$ 39,900

Business Acquisitions and Div_4

Business Acquisitions and Divestitures - Summary of Assets and Liabilities on Completion of Divestiture (Details) - Placed, LLC $ in Thousands	Sep. 30, 2019USD ($)
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Goodwill	$ 2,682
Other assets and liabilities, net	3,827
Total	27,000
Trademarks, Net
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Intangible assets	1,052
Technology, Net
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Intangible assets	14,193
Customer Relationships, Net
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Intangible assets	$ 5,246

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Changes in Carrying Amount of Goodwill (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, beginning balance	$ 632,370
Foreign currency translation	(7,930)
Divestitures	(2,682)
Goodwill, ending balance	$ 621,758

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 178,666	$ 226,259
Accumulated Amortization	106,295	100,205
Net	$ 72,371	$ 126,054
Domain Names
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Useful Life - Years	2 years 1 month 6 days	1 year 7 months 6 days
Gross Carrying Amount	$ 5,414	$ 5,414
Accumulated Amortization	5,096	4,283
Net	318	$ 1,131
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Useful Life - Years		1 year 4 months 24 days
Gross Carrying Amount	3,072	$ 5,772
Accumulated Amortization	$ 3,072	4,076
Net		$ 1,696
Acquired Developed Technology
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Useful Life - Years	3 years 3 months 18 days	3 years 9 months 18 days
Gross Carrying Amount	$ 148,298	$ 179,791
Accumulated Amortization	89,189	78,729
Net	59,109	$ 101,062
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Useful Life - Years		2 years 1 month 6 days
Gross Carrying Amount	2,172	$ 15,572
Accumulated Amortization	$ 2,172	8,012
Net		$ 7,560
Patents
Finite-Lived Intangible Assets [Line Items]
Weighted-Average Remaining Useful Life - Years	6 years 2 months 12 days	6 years 10 months 24 days
Gross Carrying Amount	$ 19,710	$ 19,710
Accumulated Amortization	6,766	5,105
Net	$ 12,944	$ 14,605

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization of intangible assets	$ 6.9	$ 10.6	$ 26.3	$ 32.2

Goodwill and Intangible Asset_5

Goodwill and Intangible Assets - Schedule of Estimated Intangible Asset Amortization Expense (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Finite Lived Intangible Assets Future Amortization Expense Current And Five Succeeding Fiscal Years [Abstract]
Remainder of 2019	$ 6,546
2020	23,028
2021	17,404
2022	10,810
2023	8,378
Thereafter	6,205
Net	$ 72,371	$ 126,054

Convertible Notes - Additional

Convertible Notes - Additional Information (Details)	1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 31, 2019USD ($)d$ / sharesshares	Sep. 30, 2019USD ($)$ / shares	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)$ / shares	Sep. 30, 2018USD ($)	Aug. 06, 2019$ / shares
Debt Instrument [Line Items]
Proceeds from issuance of convertible notes, net of issuance costs		$ 1,251,848,000	$ 0	$ 1,251,848,000	$ 0
Convertible Senior Notes
Debt Instrument [Line Items]
Debt instrument, principal amount	$ 1,265,000,000	1,265,000,000		$ 1,265,000,000
Indenture date	Aug. 9, 2019
Proceeds from issuance of convertible notes, net of issuance costs	$ 1,150,000,000
Interest payment beginning date	Feb. 1, 2020
Debt instrument, interest rate	0.75%
Debt instrument, interest rate terms				Interest is payable in cash semi-annually in arrears beginning on February 1, 2020 at a rate of 0.75% per year.
Debt instrument, maturity date	Aug. 1, 2026
Debt instrument, redemption price percentage	100.00%
Carrying amount of equity component	$ 381,500,000	377,432,000		$ 377,432,000
Effective interest rate	6.22%
Debt issuance costs allocated to equity component	$ 4,100,000
Debt issuance costs allocated to liability component	$ 9,500,000
Debt instrument convertible, amortization period				6 years 9 months 18 days
Cap price, net cost		$ 102,100,000		$ 102,100,000
Convertible Senior Notes | Class A Non-voting Common Stock
Debt Instrument [Line Items]
Shares issued upon conversion of each $1000 principal amount | shares	43.8481
Debt instrument, convertible principal amount used in conversion rate	$ 1,000
Conversion price per share | $ / shares	$ 22.81
Debt instrument convertible, percentage of conversion price	130.00%
Debt instrument convertible, number of trading days | d	20
Debt instrument, redemption price percentage	100.00%
Cap price, per share | $ / shares		$ 32.58		$ 32.58
Cap price per share, premium percentage above last reported sale price				100.00%
Last reported sale price, per share | $ / shares						$ 16.29
Convertible Senior Notes | Class A Non-voting Common Stock | Maximum
Debt Instrument [Line Items]
Conversion price per share | $ / shares		32.58		$ 32.58
Convertible Senior Notes | Class A Non-voting Common Stock | Minimum
Debt Instrument [Line Items]
Conversion price per share | $ / shares		$ 22.81		$ 22.81
Convertible Senior Notes | Class A Non-voting Common Stock | Scenario One
Debt Instrument [Line Items]
Debt instrument convertible, percentage of conversion price	130.00%
Debt instrument convertible, number of trading days | d	20
Debt instrument convertible, number of consecutive trading days | d	30
Convertible Senior Notes | Class A Non-voting Common Stock | Scenario Two
Debt Instrument [Line Items]
Debt instrument, convertible principal amount used in conversion rate	$ 1,000
Debt instrument convertible, number of consecutive trading days | d	10
Debt instrument, convertible, threshold business days	5 days
Convertible Senior Notes | Class A Non-voting Common Stock | Scenario Two | Maximum
Debt Instrument [Line Items]
Debt instrument convertible, percentage of conversion price	98.00%
Initial Placement | Convertible Senior Notes
Debt Instrument [Line Items]
Debt instrument, principal amount	$ 1,100,000,000
Over-Allotment Option | Convertible Senior Notes
Debt Instrument [Line Items]
Debt instrument, principal amount	$ 165,000,000

Convertible Notes - Summary of

Convertible Notes - Summary of Convertible Notes (Details) - Convertible Senior Notes - USD ($) $ in Thousands	Sep. 30, 2019	Aug. 31, 2019
Debt Instrument [Line Items]
Principal	$ 1,265,000	$ 1,265,000
Unamortized debt discount and issuance costs	(384,609)
Net carrying amount	880,391
Carrying amount of the equity component	$ 377,432	$ 381,500

Convertible Notes - Schedule of

Convertible Notes - Schedule of Interest Expense Recognized Related to Convertible Notes (Details) - Convertible Senior Notes $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Debt Instrument [Line Items]
Contractual interest expense	$ 1,352
Amortization of debt issuance costs	156
Amortization of debt discount	6,256
Total	$ 7,764

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Details) - USD ($)	1 Months Ended	9 Months Ended
	Jan. 31, 2017	Sep. 30, 2019	Oct. 31, 2018	Feb. 28, 2017
Indemnification Agreement
Loss Contingencies [Line Items]
Liabilities recorded		$ 0
Google Cloud Platform License Agreement
Loss Contingencies [Line Items]
Purchase commitment, description		The agreement has an initial term of five years and we are required to purchase at least $400.0 million of cloud services in each year of the agreement. For each of the first four years, up to 15% of this amount may be moved to a subsequent year. If we fail to meet the minimum purchase commitment during any year, we are required to pay the difference.
Initial term of agreement	5 years
Minimum amount of services to be purchased in each year	$ 400,000,000
Initial period required to purchase minimum amount of services	4 years
Google Cloud Platform License Agreement | Maximum
Loss Contingencies [Line Items]
Purchase commitment, percentage of minimum purchase requirement that can be moved to subsequent year	15.00%
AWS Enterprise Agreement, Cloud Services
Loss Contingencies [Line Items]
Purchase commitment, description		In March 2016, we entered into the AWS Enterprise Agreement for the use of cloud services from Amazon Web Services, Inc. (“AWS”), which was amended in March 2016 and again in February 2017. The agreement will continue indefinitely until terminated by either party. Under the February 2017 addendum to the agreement, we committed to spend $1.0 billion between January 2017 and December 2021. That addendum was amended in October 2018, and we are now committed to spend an aggregate of $1.1 billion between January 2017 and December 2022 on AWS services ($90.0 million in 2018, $150.0 million in 2019, $215.0 million in 2020, $280.0 million in 2021, and $349.0 million in 2022). If we fail to meet the minimum purchase commitment during any year, we are required to pay the difference. Any such payment may be applied to future use of AWS services during the addendum term, although it will not count towards meeting the future minimum purchase commitments under the addendum.
Minimum purchase commitment to spend between January 2017 and December 2021				$ 1,000,000,000
Minimum purchase commitment to spend between January 2017 and December 2022			$ 1,100,000,000
Minimum purchase commitment, due in 2018			90,000,000
Minimum purchase commitment, due in 2019			150,000,000
Minimum purchase commitment, due in 2020			215,000,000
Minimum purchase commitment, due in 2021			280,000,000
Minimum purchase commitment, due in 2022			$ 349,000,000

Commitments and Contingencies_2

Commitments and Contingencies - Schedule of Future Minimum Contractual Commitments (Details) $ in Thousands	Sep. 30, 2019USD ($)
Commitments And Contingencies Disclosure [Abstract]
Remainder of 2019	$ 158,192
2020	633,017
2021	683,245
2022	383,713
Total minimum commitments	$ 1,858,167

Leases - Components of Lease Co

Leases - Components of Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease expense	$ 14,442	$ 46,313
Sublease income	(1,287)	(3,480)
Total net lease costs	$ 13,155	$ 42,833

Leases - Summary of Weighted Av

Leases - Summary of Weighted Average Remaining Lease Term and Discount Rate Related to Operating Leases (Details)	Sep. 30, 2019
Leases [Abstract]
Weighted-average remaining lease term	6 years 9 months 18 days
Weighted-average discount rate	6.10%

Leases - Present Value of Opera

Leases - Present Value of Operating Lease Liabilities (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
Remainder of 2019	$ 16,260
2020	69,071
2021	64,922
2022	56,315
2023	52,166
Thereafter	152,266
Total lease payments	411,000
Less: Imputed interest	(76,477)
Present value of lease liabilities	$ 334,523

Leases - Additional Information

Leases - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Lessee Lease Description [Line Items]
Lease obligations for additional leases not yet commenced	$ 14.2	$ 14.2
Operating leases not yet commenced, start year		2019
Operating leases not yet commenced, end year		2021
Lease exit liability			$ 32.1
Net assets capitalized under leases			$ 48.4
Operating lease liabilities	$ 16.2	$ 49.4
Lease liabilities arising from obtaining operating lease right-of-use assets		$ 13.3
Minimum
Lessee Lease Description [Line Items]
Operating leases, terms	1 year	1 year
Maximum
Lessee Lease Description [Line Items]
Operating leases, terms	5 years	5 years

Fair Value Measurements - Addit

Fair Value Measurements - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair value assets transferred from level 1 to level 2	$ 0
Fair value assets transferred from level 2 to level 1	0
Fair value liabilities transferred from level 1 to level 2	0
Fair value liabilities transferred from level 2 to level 1	0
Other-than-temporary impaired investments	0
Level 2 Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Convertible notes	$ 1,300,000

Fair Value Measurements - Summa

Fair Value Measurements - Summary of Financial Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash, Cost or Amortized Cost	$ 728,828	$ 387,149
Fair Value, Measurements, Recurring
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash and Marketable securities, Cost or Amortized Cost	2,260,258	1,279,275
Cash and Marketable securities, Gross Unrealized Gains	592	17
Cash and Marketable securities, Gross Unrealized Losses	(120)	(229)
Cash and Marketable Securities, Total Estimated Fair Value	2,260,730	1,279,063
Fair Value, Measurements, Recurring | Cash
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Cash, Cost or Amortized Cost	468,196	279,950
Cash, Total Estimated Fair Value	468,196	279,950
Fair Value, Measurements, Recurring | Level 1 Securities | U.S. Government Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities, Cost or Amortized Cost	1,314,132	735,988
Marketable securities, Gross Unrealized Gains	522	12
Marketable securities, Gross Unrealized Losses	(91)	(175)
Marketable securities, Total Estimated Fair Value	1,314,563	735,825
Fair Value, Measurements, Recurring | Level 1 Securities | U.S. Government Agency Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities, Cost or Amortized Cost	351,511	181,032
Marketable securities, Gross Unrealized Gains	27	4
Marketable securities, Gross Unrealized Losses	(29)	(36)
Marketable securities, Total Estimated Fair Value	351,509	181,000
Fair Value, Measurements, Recurring | Level 2 Securities | Corporate Debt Securities
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities, Cost or Amortized Cost	31,457	35,819
Marketable securities, Gross Unrealized Gains	41	1
Marketable securities, Gross Unrealized Losses		(18)
Marketable securities, Total Estimated Fair Value	31,498	35,802
Fair Value, Measurements, Recurring | Level 2 Securities | Commercial Paper
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities, Cost or Amortized Cost	72,726	33,193
Marketable securities, Gross Unrealized Gains	2
Marketable securities, Total Estimated Fair Value	72,728	33,193
Fair Value, Measurements, Recurring | Level 2 Securities | Certificates of Deposit
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Marketable securities, Cost or Amortized Cost	22,236	13,293
Marketable securities, Total Estimated Fair Value	$ 22,236	$ 13,293

Income Taxes - Additional Infor

Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income tax benefit (expense)	$ 1,296	$ (244)	$ (61)	$ (2,899)

Accumulated Other Comprehensi_3

Accumulated Other Comprehensive Income (Loss) - Schedules of Changes in Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period			$ 2,310,999
OCI before reclassifications			(10,365)
Amounts reclassified from AOCI			45
Total other comprehensive income (loss), net of tax	$ (9,275)	$ (1,737)	(10,320)	$ (7,687)
Balance, end of period	2,324,415	2,384,092	2,324,415	2,384,092
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period			(368)
OCI before reclassifications			564
Amounts reclassified from AOCI			45
Total other comprehensive income (loss), net of tax			609
Balance, end of period	241		241
Foreign Currency Translation
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period			3,515
OCI before reclassifications			(10,929)
Total other comprehensive income (loss), net of tax			(10,929)
Balance, end of period	(7,414)		(7,414)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income Loss [Line Items]
Balance, beginning of period	2,102	8,207	3,147	14,157
Total other comprehensive income (loss), net of tax	(9,275)	(1,737)	(10,320)	(7,687)
Balance, end of period	$ (7,173)	$ 6,470	$ (7,173)	$ 6,470

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Income (Loss) - Additional Information (Details) $ in Millions	9 Months Ended
	Sep. 30, 2019USD ($)
Marketable Securities
Accumulated Other Comprehensive Income Loss [Line Items]
Tax expense for gains / losses on marketable securities	$ 0.2

Property and Equipment, Net - P

Property and Equipment, Net - Property and Equipment, Net by Geographic Area (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Property and equipment, net:
Total property and equipment, net	$ 177,073	$ 212,560
United States
Property and equipment, net:
Total property and equipment, net	158,719	190,412
Rest of World
Property and equipment, net:
Total property and equipment, net	$ 18,354	$ 22,148

Property and Equipment, Net -_2

Property and Equipment, Net - Property and Equipment, Net by Geographic Area (Parenthetical) (Details) - Country	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Geographic Concentrations | Property and Equipment Net | Rest of World
Revenues From External Customers And Long Lived Assets [Line Items]
Number of individual country exceeded 10% of total property and equipment	0	0