GrubHub 10-K 28 Feb 19 2018 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2018	Feb. 15, 2019	Jun. 30, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	FY
Trading Symbol	GRUB
Entity Registrant Name	GRUBHUB INC.
Entity Central Index Key	1,594,109
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		90,999,369
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	Yes
Entity Public Float			$ 7,262,685,665

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenues	$ 1,007,257	$ 683,067	$ 493,331
Costs and expenses:
Operations and support	454,321	269,453	171,756
Sales and marketing	214,290	150,730	110,323
Technology (exclusive of amortization)	82,278	56,263	42,454
General and administrative	85,465	65,023	50,482
Depreciation and amortization	85,940	51,848	35,193
Total costs and expenses	922,294	593,317	410,208
Income from operations	84,963	89,750	83,123
Interest (income) expense - net	3,530	102	(729)
Income before provision for income taxes	81,433	89,648	83,852
Income tax (benefit) expense	2,952	(9,335)	34,295
Net income attributable to common stockholders	$ 78,481	$ 98,983	$ 49,557
Net income per share attributable to common stockholders:
Basic	$ 0.88	$ 1.15	$ 0.58
Diluted	$ 0.85	$ 1.12	$ 0.58
Weighted-average shares used to compute net income per share attributable to common stockholders:
Basic	89,447	86,297	85,069
Diluted	92,354	88,182	86,135	[1]
[1]	Prior to the adoption of ASU 2016-09, the treasury stock method calculation of weighted-average dilutive shares outstanding for the year ended December 31, 2016 included the estimated impact of tax benefits and deficiencies.

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 78,481	$ 98,983	$ 49,557
OTHER COMPREHENSIVE INCOME (LOSS)
Foreign currency translation adjustments	(663)	850	(1,474)
COMPREHENSIVE INCOME	$ 77,818	$ 99,833	$ 48,083

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 211,245	$ 234,090
Short-term investments	14,084	23,605
Accounts receivable, less allowances for doubtful accounts	110,855	87,377
Income tax receivable	9,949	8,593
Prepaid expenses and other current assets	17,642	6,818
Total current assets	363,775	360,483
PROPERTY AND EQUIPMENT:
Property and equipment, net of depreciation and amortization	119,495	71,384
OTHER ASSETS:
Other assets	14,186	6,487
Goodwill	1,019,239	589,862
Acquired intangible assets, net of amortization	549,013	515,553
Total other assets	1,582,438	1,111,902
TOTAL ASSETS	2,065,708	1,543,769
CURRENT LIABILITIES:
Restaurant food liability	127,344	119,922
Accounts payable	26,656	7,607
Accrued payroll	18,173	13,186
Taxes payable	422	3,109
Short-term debt	6,250	3,906
Other accruals	44,323	26,818
Total current liabilities	223,168	174,548
LONG-TERM LIABILITIES:
Deferred taxes, non-current	46,383	74,292
Other accruals	18,270	7,468
Long-term debt	335,548	169,645
Total long-term liabilities	400,201	251,405
Commitments and contingencies
STOCKHOLDERS’ EQUITY:
Preferred Stock, $0.0001 par value. Authorized: 25,000,000 shares as of December 31, 2018 and December 31, 2017; issued and outstanding: no shares as of December 31, 2018 and December 31, 2017.
Common stock, $0.0001 par value. Authorized: 500,000,000 shares at December 31, 2018 and December 31, 2017; issued and outstanding: 90,756,548 and 86,790,624 shares as of December 31, 2018 and December 31, 2017, respectively	9	9
Accumulated other comprehensive loss	(1,891)	(1,228)
Additional paid-in capital	1,094,866	849,043
Retained earnings	349,355	269,992
Total Stockholders’ Equity	1,442,339	1,117,816
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 2,065,708	$ 1,543,769

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Preferred Stock, par value	$ 0.0001	$ 0.0001
Preferred Stock, shares authorized	25,000,000	25,000,000
Preferred Stock, shares issued	0	0
Preferred Stock, shares outstanding	0	0
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	90,756,548	86,790,624
Common stock, shares outstanding	90,756,548	86,790,624

Statements of Cash Flows

Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 78,481	$ 98,983	$ 49,557
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	21,647	11,775	8,921
Bad debt expense	941	1,424	1,102
Deferred taxes	1,724	(31,179)	1,027
Amortization of intangible assets and developed software	64,293	40,073	26,272
Stock-based compensation	55,261	32,748	23,559
Deferred rent	4,974	849	1,286
Tenant allowance amortization	(837)	(135)	(159)
Amortization of deferred loan costs	715	487	365
Other	(241)	(168)	(612)
Change in assets and liabilities, net of the effects of business acquisitions:
Accounts receivable	(6,092)	(26,236)	(12,027)
Income taxes receivable	(1,356)	(1,597)	(5,461)
Prepaid expenses and other assets	(16,270)	5,516	(8,663)
Restaurant food liability	2,921	8,576	16,451
Accounts payable	11,160	(4,244)	(3,204)
Accrued payroll	3,621	5,537	1,819
Other accruals	4,585	11,735	(2,453)
Net cash provided by operating activities	225,527	154,144	97,780
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisitions of businesses, net of cash acquired	(517,909)	(333,301)	(65,849)
Purchases of investments	(57,197)	(154,758)	(226,694)
Proceeds from maturity of investments	67,166	215,983	284,662
Capitalized website and development costs	(31,180)	(21,325)	(12,809)
Purchases of property and equipment	(43,033)	(18,971)	(24,087)
Acquisition of other intangible assets	(11,851)	(25,147)	(250)
Other cash flows from investing activities		557	(492)
Net cash used in investing activities	(594,004)	(336,962)	(45,519)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of common stock	200,000
Proceeds from borrowings under the credit facility	222,000	200,000
Repayments of borrowings under the credit facility	(53,906)	(25,781)
Repurchases of Common Stock			(14,774)
Proceeds from exercise of stock options	14,190	16,375	13,468
Excess tax benefits related to stock-based compensation			24,906
Taxes paid related to net settlement of stock-based compensation awards	(35,599)	(10,556)	(2,779)
Payments for debt issuance costs		(1,979)	(1,477)
Net cash provided by financing activities	346,685	178,059	19,344
Net change in cash, cash equivalents, and restricted cash	(21,792)	(4,759)	71,605
Effect of exchange rates on cash, cash equivalents and restricted cash	(645)	784	(1,394)
Cash, cash equivalents, and restricted cash at beginning of year	238,239	242,214	172,003
Cash, cash equivalents, and restricted cash at end of the year	215,802	238,239	242,214
SUPPLEMENTAL DISCLOSURE OF NON-CASH ITEMS
Cash paid for income taxes	7,895	19,148	8,722
Capitalized property, equipment and website and development costs in accounts payable at period end	7,463	2,960	2,583
Net working capital adjustment receivable	127	737
Fair value of equity awards assumed on acquisition	2,966	274
RECONCILIATION OF CASH, CASH EQUIVALENTS, AND RESTRICTED CASH
Cash and cash equivalents	211,245	$ 234,090	$ 239,528
Restricted cash included in prepaid expenses and other current assets	$ 1,398
Restricted Cash, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:PrepaidExpenseAndOtherAssetsCurrent	us-gaap:PrepaidExpenseAndOtherAssetsCurrent	us-gaap:PrepaidExpenseAndOtherAssetsCurrent
Restricted cash included in other assets	$ 3,159	$ 4,149	$ 2,686
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Total cash, cash equivalents, and restricted cash	$ 215,802	$ 238,239	$ 242,214

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Balance, beginning at Dec. 31, 2015	$ 877,596	$ 8	$ 759,292	$ (604)	$ 118,900
Balance, beginning (in shares) at Dec. 31, 2015		84,979,869
Net income	49,557				49,557
Currency translation	(1,474)			(1,474)
Stock-based compensation	25,619		25,619
Tax benefit related to stock-based compensation	24,906		24,906
Stock option exercises and vesting of restricted stock units, net of withholdings and other	13,468	$ 1	13,467
Stock option exercises and vesting of restricted stock units, net of withholdings and other (in shares)		1,523,952
Repurchases of common stock	(14,774)		(14,774)
Repurchases of common stock (shares)		(724,473)
Shares repurchased and retired to satisfy tax withholding upon vesting	(2,779)		(2,779)
Shares repurchased and retired to satisfy tax withholding upon vesting (in shares)		(87,015)
Balance, ending at Dec. 31, 2016	972,119	$ 9	805,731	(2,078)	168,457
Balance, ending (in shares) at Dec. 31, 2016		85,692,333
Net income	98,983				98,983
Cumulative effect adjustment upon adoption of ASU | ASU 2016-09	2,552				2,552
Currency translation	850			850
Stock-based compensation	37,219		37,219
Stock option exercises and vesting of restricted stock units, net of withholdings and other	16,375		16,375
Stock option exercises and vesting of restricted stock units, net of withholdings and other (in shares)		1,331,083
Issuance of common stock, acquisitions	274		274
Shares repurchased and retired to satisfy tax withholding upon vesting	(10,556)		(10,556)
Shares repurchased and retired to satisfy tax withholding upon vesting (in shares)		(232,792)
Balance, ending at Dec. 31, 2017	1,117,816	$ 9	849,043	(1,228)	269,992
Balance, ending (in shares) at Dec. 31, 2017		86,790,624
Net income	78,481				78,481
Cumulative effect adjustment upon adoption of ASU | ASU 2014-09	882				882
Currency translation	(663)			(663)
Stock-based compensation	64,266		64,266
Stock option exercises and vesting of restricted stock units, net of withholdings and other	14,190		14,190
Stock option exercises and vesting of restricted stock units, net of withholdings and other (in shares)		1,512,426
Issuance of common stock, investments	200,000		200,000
Issuance of common stock, investments		2,820,464
Issuance of common stock, acquisitions	2,966		2,966
Shares repurchased and retired to satisfy tax withholding upon vesting	(35,599)		(35,599)
Shares repurchased and retired to satisfy tax withholding upon vesting (in shares)		(366,966)
Balance, ending at Dec. 31, 2018	$ 1,442,339	$ 9	$ 1,094,866	$ (1,891)	$ 349,355
Balance, ending (in shares) at Dec. 31, 2018		90,756,548

Organization

Organization	12 Months Ended
	Dec. 31, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Organization	1. Organization Grubhub Inc., a Delaware corporation, and its wholly-owned subsidiaries (collectively referred to as the “Company”) provide an online and mobile takeout marketplace for restaurant pick-up and delivery orders. The Company connects diners and restaurants through restaurant technology and easy-to-use platforms. Diners enter their delivery address or use geo-location within the mobile applications and the Company displays the menus and other relevant information for restaurants in its network. Orders may be placed directly online, via mobile applications or over the phone. The Company primarily charges the restaurant a per order commission that is largely fee based. In many markets, the Company also provides delivery services to restaurants on its platform that do not have their own delivery operations. The Company’s takeout marketplace, and related platforms where the Company provides marketing services to generate orders, are collectively referred to as the “Platform”.

Summary of Significant Accounti

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2. Summary of Significant Accounting Policies Basis of Presentation and Principles of Consolidation The Company’s consolidated financial statements were prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The accompanying consolidated financial statements include all wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. The consolidated statements of operations include the results of entities acquired from the dates of the acquisitions for accounting purposes. On January 1, 2018, the Company adopted Financial Accounting Standards Board (the “FASB”) Revenue from Contracts with Customers Recently Issued Accounting Pronouncements Revenue, Changes in Accounting Principle See “ Recently Issued Accounting Pronouncements ” below for a description of accounting principle changes adopted during the year ended December 31, 2018 related to revenue and the statement of cash flows. Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the related disclosures at the date of the financial statements, as well as the reported amounts of revenue and expenses during the periods presented. Estimates include revenue recognition, the allowance for doubtful accounts, website and internal-use software development costs, goodwill, depreciable lives of property and equipment, recoverability of intangible assets with finite lives and other long-lived assets and stock-based compensation. To the extent there are material differences between these estimates, judgments or assumptions and actual results, the Company’s consolidated financial statements will be affected. In many cases, the accounting treatment of a particular transaction is specifically dictated by GAAP and does not require management’s judgment in its application. Cash and Cash Equivalents Cash includes demand deposits with banks or financial institutions. Cash equivalents include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and that are so near their maturity that they present minimal risk of changes in value because of changes in interest rates. The Company’s cash equivalents include only investments with original maturities of three months or less. The Company regularly maintains cash in excess of federally insured limits at financial institutions. Cash and cash equivalents excludes the Company’s restricted cash balances of $4.6 million and $4.1 million as of December 31, 2018 and 2017, respectively, which are included within prepaid expenses and other current assets and other long term assets on the consolidated balance sheets. Marketable Securities Marketable securities consist primarily of commercial paper and investment grade U.S. and non-U.S.-issued corporate debt securities. The Company invests in a diversified portfolio of marketable securities and limits the concentration of its investment in any particular security. Marketable securities with original maturities of three months or less are included in cash and cash equivalents and marketable securities with original maturities greater than three months, but less than one year, are included in short term investments on the consolidated balance sheets. The Company determines the classification of its marketable securities as available-for-sale or held-to-maturity at the time of purchase and reassesses these determinations at each balance sheet date. Debt securities are classified as held-to-maturity when the Company has the intent to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost and are periodically assessed for other-than-temporary impairment. The amortized cost of debt securities is adjusted for the amortization of premiums and accretion of discounts to maturity, which is recognized as interest income within net interest (income) expense in the consolidated statements of operations. Interest income is recognized when earned. Accumulated Other Comprehensive Loss Accumulated other comprehensive loss consists of foreign currency translation adjustments. The financial statements of the Company’s foreign subsidiaries are translated from their functional currency into U.S. dollars. Assets and liabilities are translated at period end rates of exchange, and revenue and expenses are translated using average rates of exchange. The resulting gain or loss is included in accumulated other comprehensive loss on the consolidated balance sheets. Property and Equipment, Net Property and equipment is recorded at cost and depreciated using the straight-line method over the estimated useful lives of the related assets. The useful lives are as follows: Estimated Useful Life Computer equipment 2-3 years Furniture and fixtures 5 years Developed software 1-3 years Purchased software and digital assets 3-5 years Leasehold improvements Shorter of expected useful life or lease term Maintenance and repair costs are charged to expense as incurred. Major improvements, which extend the useful life of the related asset, are capitalized. Upon disposal of a fixed asset, the Company records a gain or loss based on the difference between the proceeds received and the net book value of the disposed asset. Accounts Receivable, Net See Note 3, Revenue Advertising Costs Advertising costs are generally expensed as incurred in connection with the requisite service period. Certain advertising production costs are capitalized and expensed when the advertisement first takes place. For the years ended December 31, 2018, 2017 and 2016, expenses attributable to advertising totaled approximately $170.3 million, $107.2 million and $75.5 million, respectively. Advertising costs are recorded in sales and marketing expense on the Company’s consolidated statements of operations. Stock-Based Compensation The Company measures compensation expense for all stock-based awards, including stock options, restricted stock units and restricted stock awards, at fair value on the date of grant and recognizes compensation expense over the service period on a straight-line basis for awards expected to vest. The Company uses the Black-Scholes option-pricing model to determine the fair value for stock options. Management has determined the Black-Scholes fair value of stock option awards and related stock-based compensation expense with the assistance of third-party valuations. Determining the fair value of stock-based awards at the grant date requires judgment. The determination of the grant date fair value of options using an option-pricing model is affected by the Company’s estimated common stock fair value as well as assumptions regarding a number of other complex and subjective variables. If any of the assumptions used in the Black-Scholes model changes significantly, stock-based compensation for future awards may differ materially compared with the awards granted previously. The Black-Scholes option-pricing model requires the use of highly subjective and complex assumptions, including the expected term and the price volatility of the underlying stock, which determine the fair value of stock-based awards. These assumptions include: • Risk-free rate. Risk-free interest rates are derived from U.S. Treasury securities as of the option grant date. • Expected dividend yields. Expected dividend yields are based on our historical dividend payments, which have been zero to date (excluding the preferred stock tax distributions made by Seamless Holdings prior to 2015). • Volatility. Beginning in the first quarter of 2018, expected volatility is based on the historical and implied volatilities of the Company’s own common stock. Prior to 2018, the expected stock price volatility was based on a combination of the historical and implied volatilities of comparable publicly-traded companies and the historical volatility of our common stock due to our limited trading history as there was no active external or internal market for our common stock prior to the Company’s initial public offering in April 2014. • Expected term. Beginning in the first quarter of 2017, the expected term calculation for option awards considers a combination of the Company’s historical and estimated future exercise behavior. Prior to 2017, t he Company applied a simplified method which estimated the weighted-average expected life of the options as the average of the vesting option schedule and the term of the award due to insufficient historical exercise data as a result of the limited period of time stock-based awards had been exercisable. • Forfeiture rate. Forfeiture rates are estimated using historical actual forfeiture trends as well as our judgment of future forfeitures. These rates are evaluated at least annually and any change in compensation expense is recognized in the period of the change. The estimation of stock awards that will ultimately vest requires judgment and, to the extent actual results or updated estimates differ from our current estimates, such amounts will be recorded as a cumulative adjustment in the period in which the estimates are revised. The Company considers many factors when estimating expected forfeitures, including the types of awards and employee class. Actual results, and future changes in estimates, may differ substantially from management’s current estimates. See Note 10, Stock-Based Compensation, for the weighted-average assumptions used to estimate the fair value of options granted during the years ended December 31, 2018, 2017 and 2016. Prior to the adoption of Accounting Standards Update No. 2016-09, “Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”) in 2017 , other tax attributes available to the Company had been utilized. Beginning in the first quarter of 2017, the Company recognizes tax benefits and deficiencies for stock-based awards in income tax (benefit) expense within the consolidated statements of operations. See Note 10, Stock-Based Compensation, for further discussion. Income Tax (Benefit) Expense Income tax (benefit) expense is determined using the asset and liability method. Under this method, deferred tax assets and liabilities are calculated based upon the temporary differences between the financial statement and income tax bases of assets and liabilities using the enacted tax rates that are applicable in a given year. The utilization of deferred tax assets is limited by the amount of taxable income expected to be generated within the allowable carryforward period and other factors. The Company records a valuation allowance to reduce deferred tax assets to the amount management believes is more likely than not to be realized. As of December 31, 2018 and 2017, a valuation allowance of $23.8 million and $4.8 million, respectively, was recorded on the Company’s consolidated balance sheets. See Note 11, Income Taxes The Company utilizes a two-step approach to recognizing and measuring uncertain tax positions (“tax contingencies”). The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount which is more than 50% likely to be realized upon ultimate settlement. The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments, and which may not accurately forecast actual outcomes. Management believes that it is more likely than not that forecasted income, including future reversals of existing taxable temporary differences, will be sufficient to fully recover the net deferred tax assets. In the event the Company determines that all or part of the net deferred tax assets are not realizable in the future, we will adjust the valuation allowance with the adjustment recognized as expense in the period in which such determination is made. The calculation of income tax liabilities involves significant judgment in estimating the impact of uncertainties and complex tax laws. In addition, the Company’s tax returns are subject to audit by various U.S. and foreign tax authorities. Resolution of these uncertainties in a manner inconsistent with our expectations could have a material impact on the Company’s financial position and results of operations. Due to the reduced cost of repatriating unremitted earnings as a result of U.S. tax legislation signed into law in December of 2017, the Tax Cuts and Jobs Act (the “Tax Act”) The Company includes interest and penalties related to tax contingencies in the provision for income taxes in the consolidated statements of operations. Management does not expect the total amount of unrecognized tax benefits to significantly change in the next twelve months. Intangible Assets Intangible assets with finite useful lives are amortized using the straight-line method over their estimated useful lives and are reviewed for impairment. The Company evaluates intangible assets with finite and indefinite useful lives and other long-lived assets for impairment whenever events or circumstances indicate that they may not be recoverable, or at least annually. If management determines in its qualitative assessment that it is more likely than not that the assets may not be recoverable, the recoverability of finite and other long-lived assets is measured by comparing the carrying amount of an asset group to the future undiscounted net cash flows expected to be generated by that asset group. The Company groups assets for purposes of such review at the lowest level for which identifiable cash flows of the asset group are largely independent of the cash flows of the other groups of assets and liabilities. The amount of impairment to be recognized for finite and indefinite-lived intangible assets and other long-lived assets is calculated as the difference between the carrying value and the fair value of the asset group, generally measured by discounting estimated future cash flows. There were no impairment indicators present during the years ended December 31, 2018, 2017 or 2016. Website and Software Development Costs The costs incurred in the preliminary stages of website and software development are expensed as incurred. Once an application has reached the development stage, internal and external costs, if direct and incremental and deemed by management to be significant, are capitalized and amortized on a straight-line basis over the estimated useful life of the application. Maintenance and enhancement costs, including those costs in the post-implementation stages, are typically expensed as incurred, unless such costs relate to substantial upgrades and enhancements to the website or software that result in added functionality, in which case the costs are capitalized and amortized on a straight-line basis over the estimated useful lives. Amortization expense related to capitalized website and software development costs is included in depreciation and amortization in the consolidated statements of operations. The Company capitalized $41.1 million, $26.0 million and $15.6 million of website development costs during the years ended December 31, 2018, 2017 and 2016, respectively. Goodwill Goodwill represents the excess of the cost of an acquired business over the fair value of the assets acquired at the date of acquisition. The Company’s methodology for allocating the purchase price of acquisitions is based on established valuation techniques that consider a number of factors, including valuations performed by third-party appraisers. As of December 31, 2018, the Company had $1,019.2 million in goodwill on its consolidated balance sheets. The Company assesses the impairment of goodwill at least annually and whenever events or changes in circumstances indicate that goodwill may be impaired. Absent any special circumstances that could require an interim test, the Company has elected to test for goodwill impairment at September 30 of each year. The Company has one reporting unit in testing goodwill for impairment. In testing goodwill for impairment, the Company may elect to utilize a qualitative assessment to evaluate whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the qualitative assessment indicates that goodwill impairment is more likely than not, the Company performs a quantitative impairment test. T he Company would recognize an impairment charge for the amount by which the reporting unit’s carrying amount exceeds its fair value, if any, not to exceed the carrying amount of goodwill. Management determined the fair value of the Company as of September 30, 2018 by using a market-based approach that utilized our market capitalization, as adjusted for factors such as a control premium. After consideration of the Company’s market capitalization, business growth and other factors, management determined that it was more likely than not that the fair value of the Company exceeded its carrying amount at September 30, 2018 and that further analysis was not required. Additionally, as part of the interim review for indicators of impairment, management analyzed potential changes in value based on operating results for the three months ended December 31, 2018 compared to expected results. Management also considered how the Company’s market capitalization, business growth and other factors used in the September 30, 2018 impairment analysis, could be impacted by changes in market conditions and economic events. For example, the fair market value of the Company’s stock has decreased since September 30, 2018. Management considered these trends in performing its assessment of whether an interim impairment review was required. Based on this interim assessment, management concluded that as of December 31, 2018, there were no events or changes in circumstances that indicated it was more likely than not that the Company’s fair value was below its carrying value. The Company determined there was no goodwill impairment during the years ended December 31, 2018, 2017 and 2016. Nevertheless, significant changes in global economic and market conditions could result in changes to expectations of future financial results and key valuation assumptions. Such changes could result in revisions of management’s estimates of the Company’s fair value and could result in a material impairment of goodwill. D ebt Issuance Costs The Company allocates deferred debt issuance costs incurred for its current credit facility between the revolver and term loan based on their relative borrowing capacity. Deferred debt issuance costs associated with the revolving credit facility are recorded within other assets and those associated with the term loan are recorded as a reduction of the carrying value of the debt on the consolidated balance sheets. Debt Fair Value Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. The standards also establish a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. See Note 15, Fair Value Measurement Concentration of Credit Risk Financial instruments which potentially subject the Company to concentrations of credit risk consist principally of accounts receivable. For the years ended December 31, 2018, 2017 and 2016, the Company had no customers which accounted for more than 10% of revenue or accounts receivable. Revenue Recognition See Note 3, Revenue, Deferred Rent For the Company’s operating leases, the Company recognizes rent expenses on a straight-line basis over the terms of the leases. Accordingly, the Company records the difference between cash rent payments and the recognition of rent expenses as a deferred rent liability within other accruals in the consolidated balance sheets. The Company also has landlord-funded leasehold improvements that are recorded as tenant allowances, which are being amortized as a reduction of rent expense over the noncancelable terms of the operating leases. Deferred rent and tenant allowances recorded as of December 31, 2018 will be impacted by changes in accounting pronouncements that became effective in the first quarter of 2019. See Recently Issued Accounting Pronouncements Segments The Company has one reportable segment, which has been identified based on how the chief operating decision maker manages the business, makes operating decisions and evaluates operating performance. Recently Issued Accounting Pronouncements Company’s consolidated financial position, results of operations or cash flows. the FASB In August 2016, the FASB issued Accounting Standards Update No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments” (“ASU 2016-15”). ASU 2016-15 adds or clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows with the intent of reducing diversity in practice related to eight types of cash flows including, among others, debt prepayment or debt extinguishment costs, contingent consideration payments made after a business combination, and separately identifiable cash flows and application of the predominance principle. In addition, in November 2016, the FASB issued Accounting Standards Update No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash” (“ASU 2016-18”). ASU 2016-18 requires companies to include amounts generally described as restricted cash and restricted cash equivalents in cash and cash equivalents when reconciling beginning-of-period and end-of-period total amounts shown on the statement of cash flow . ASU 2016-15 and ASU 2016-18 were effective for and adopted by the Company beginning in the first quarter of 2018. The amendments were applied using a retrospective transition method to each period presented and impacted the Company’s presentation of the consolidated statements of cash flows. The adoption of ASU 2016-15 and ASU 2016-18 had no material impact on the Company’s consolidated financial position, results of operations or cash flows as the Company’s restricted cash balances are immaterial. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). ASU 2016-13 introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables and held-to-maturity debt securities, which will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This ASU also expands disclosure requirements. ASU 2016-13 is effective for the Company beginning in the first quarter of 2020 and early adoption is permitted. The guidance will be applied using the modified-retrospective approach. The adoption of ASU 2016-13 is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows. In February 2016, the FASB issued Accounting Standards Update No. the FASB issued Accounting Standards Update No. 2018-11 “Leases (Topic 842): Targeted Improvements” (“ASU 2018-11”), which provides for the election of transition methods between the modified retrospective method and the optional transition relief method. The modified retrospective method is applied to all prior reporting periods presented with a cumulative-effect adjustment recorded in the earliest comparative period while the optional transition relief method is applied beginning in the period of adoption with a cumulative-effect adjustment recorded in the first quarter of 2019. The Company will apply the optional transition relief method and has elected the optional practical expedient package, which includes retaining the current classification of leases. The adoption of ASC Topic 842 has a significant impact on the Company’s consolidated financial position, but management anticipates that it will have no material impact to its results of operations or cash flows. In May 2014, and in subsequent updates, the FASB issued ASC Topic 606 , Revenue from Contracts with Customers, Revenue Recognition industry-specific requirements. ASC Topic 606 establishes a five-step revenue recognition process in which an entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. ASC Topic 606 also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenues and cash flows from contracts with customers. ASC Topic 606 was effective for and adopted by the Company in the first quarter of 2018. . The adoption of ASC Topic 606 did not have and is not expected to have a material impact on the The adoption of ASC Topic 606 resulted in an increase in revenues of $1.2 million for the year December 31, 2018 • Beginning in January 1, 2018, the Company defers the incremental costs of obtaining contracts as contract acquisition assets resulting in a net decrease of $9.0 million in sales and marketing expense in the consolidated statements of operations for the year December 31, 2018 • Beginning in the first quarter of 2018, the Company recognizes revenue from estimated unredeemed gift cards that are not subject to unclaimed property laws over the expected customer redemption period, rather than when the likelihood of redemption became remote. The Company recorded a cumulative-effect adjustment to opening retained earnings as of January 1, 2018 of $0.9 million related to unredeemed gift cards, breakage income of $1.1 million in revenues in the consolidated statements of operations during the year December 31, 2018 and a corresponding decrease in other accruals of $2.0 million on the consolidated balance sheets. • Changes in the timing of revenue recognition under ASC Topic 606 related to incentives, refunds and adjustments resulted in a $0.1 million increase in revenues in the consolidated statements of operations during the year ended December 31, 2018. • The adoption of ASC Topic 606 had no impact to the Company’s total net cash provided by or used in operations, investing or financing activities within the Company’s consolidated statement of cash flows for the year ended See Note 3, Revenue

Revenue

Revenue	12 Months Ended
	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Revenue	3. Revenue Revenues are recognized when control of the promised goods or services is transferred to the customer, in the amount that reflects the consideration the Company expects to receive in exchange for those good or services. The Company generates revenues primarily when diners place an order on the Platform through its mobile applications, its websites, or through third-party websites that incorporate the Company’s API or one of the Company’s listed phone numbers. Restaurants generally pay a commission, typically a percentage of the transaction, on orders that are processed through the Platform. Most of the restaurants on the Company’s Platform can choose their level of commission rate, at or above a base rate. A restaurant can choose to pay a higher rate that affects its prominence and exposure to diners on the Platform. Additionally, restaurants on the Platform that use the Company’s delivery services pay an additional commission for the use of those services. The Company may also charge a delivery or other convenience fee directly to the diner. Revenues from online and phone pick-up and delivery orders are recognized when the orders are transmitted to the restaurants, including revenues for managed delivery services due to the simultaneous nature of the Company’s delivery operations. The amount of revenue recognized by the Company is based on the arrangement with the related restaurant and is adjusted for any expected refunds or adjustments, which are estimated using an expected value approach based on historical experience and any cash credits related to the transaction, including incentive offers provided to restaurants and diners. The Company also recognizes as revenue any fees charged to the diner for delivery or convenience services provided by the Company. Although the Company processes and collects the entire amount of the transaction with the diner, it records revenue for transmitting orders to restaurants on a net basis because the Company is acting as an agent for takeout orders, which are prepared by the restaurants. The Company is the principal in the transaction with respect to credit card processing and managed delivery services because it controls the respective services. As a result, costs incurred for processing the credit card transactions and providing delivery services are included in operations and support expense in the consolidated statements of operations. The Company periodically provides incentive offers to restaurants and diners to use our platform. These promotions are generally cash credits to be applied against purchases. These incentive offers are recorded as a reduction in revenues, generally on the date the corresponding order revenue is recognized. For those incentives that create an obligation to discount current or future orders, management applies judgment in allocating the incentives that are expected to be redeemed proportionally to current and future orders based on their relative expected transaction prices. The Company derives some revenues from mobile application development professional services and access to the respective order ahead platforms and related services. Revenues for professional services and related platform access fees are generally recognized ratably over the subscription period beginning on the date the platform access becomes available to the customer. Revenues for certain professional services may be recognized in full once the services are performed if they are distinct. The Company also generates a small amount of revenues directly from companies that participate in our corporate ordering program and by selling advertising to third parties on our allmenus.com website. The Company does not anticipate that the foregoing will generate a material portion of our revenues in the foreseeable future. For most orders, diners use a credit card to pay for their meal when the order is placed. For these transactions, the Company collects the total amount of the diner’s order net of payment processing fees from the payment processor and remits the net proceeds to the restaurant less commission. The Company generally accumulates funds and remits the net proceeds to the restaurants on at least a monthly basis, depending on the payment terms with the restaurant. The Company also accepts payment for orders via gift cards offered on its platform. For gift cards that are not subject to unclaimed property laws, t he Company recognizes revenue from estimated unredeemed gift cards, based on its historical breakage experience, over the expected customer redemption period. Certain governmental taxes are imposed on the products and services provided through the Company’s platform and are included in the order fees charged to the diner and collected by the Company. Sales taxes are either remitted to the restaurant for payment or are paid directly to certain states. These fees are recorded on a net basis, and, as a result, are excluded from revenues. Accounts Receivable, Net Accounts receivable primarily represent the net cash due from the Company’s payment processors for cleared transactions and amounts owed from corporate and other institutional customers and Enterprise restaurants, which are generally invoiced on a monthly basis. The carrying amount of the Company’s receivables is reduced by an allowance for doubtful accounts that reflects management’s best estimate of amounts that will not be collected. These uncollected amounts are generally not recovered from the restaurants. The allowance is recorded through a charge to bad debt expense which is recognized within general and administrative expense in the consolidated statements of operations. The allowance is based on historical loss experience and any specific risks, current or forecasted, identified in collection matters. Management provides for probable uncollectible amounts through a charge against bad debt expense and a credit to an allowance based on its assessment of the current status of individual accounts. Balances still outstanding after management has used reasonable collection efforts are written off against the allowance. The Company does not charge interest on trade receivables. The Company incurs expenses for uncollected credit card receivables (or “chargebacks”), including fraudulent orders, when a diner’s card is authorized but fails to process, and for other unpaid credit card receivables. The majority of the Company’s chargeback expense is recorded directly to general and administrative expense in the consolidated statements of operations as the charges are incurred; however, a portion of the allowance for doubtful accounts includes a reserve for estimated chargebacks on the net cash due from the Company’s payment processors as of the end of the period. Changes in the Company’s allowance for doubtful accounts for the periods presented were as follows: Year Ended December 31, 2018 2017 Balance at beginning of period $ 1,513 $ 1,229 Additions (reductions) to expense (23 ) 335 Write-offs, net of recoveries and other adjustments (30 ) (51 ) Balance at end of period $ 1,460 $ 1,513 Deferred Revenues The Company’s deferred revenues consist primarily of gift card liabilities, certain incentive liabilities as well as customer billings for professional services recognized ratably over the subscription period. These amounts are included within other accruals on the consolidated balance sheets and are not material to the Company’s consolidated financial position. The majority of gift cards and incentives issued by the Company are redeemed within a year. Contract Acquisition Costs The Company defers the incremental costs of obtaining and renewing restaurant and corporate and campus program customer contracts, primarily consisting of commissions and bonuses and related payroll taxes, as contract acquisition assets within other assets on the consolidated balance sheets. Contract acquisition assets are amortized using the straight-line method to sales and marketing expense in the consolidated statements of operations over the useful life of the contract, which is estimated to be approximately 4 years based on anticipated customer renewals. During the year ended December 31, 2018, the Company deferred $10.3 million of contract acquisitions costs and amortized $1.3 million of related expense. No amounts were deferred prior to the adoption of ASC Topic 606 on January 1, 2018.

Acquisitions

Acquisitions	12 Months Ended
	Dec. 31, 2018
Business Combinations [Abstract]
Acquisitions	4. Acquisitions 2018 Acquisitions On November 7, 2018, the Company acquired all of the issued and outstanding shares of Tapingo Ltd. (“Tapingo”) for approximately $152.1 million, including $151.8 million of cash paid (net of cash acquired of $1.5 million), $0.4 million of other non-cash consideration and a net working capital adjustment receivable of $0.1 million. Tapingo is a leading platform for campus food ordering with direct integration into college meal plans and point of sale systems. The acquisition of Tapingo has enhanced the Company’s diner network on college campuses. On September 13, 2018, the Company acquired SCVNGR, Inc. d/b/a LevelUp (“LevelUp”) for approximately $369.4 million, including $366.8 million of cash paid (net of cash acquired of $6.0 million) and $2.6 million of other non-cash consideration. LevelUp is a leading provider of mobile diner engagement and payment solutions for national and regional restaurant brands. The acquisition of LevelUp has simplified the Company’s integrations with restaurants’ systems, increased diner engagement and accelerated product development. The Company assumed Tapingo and LevelUp employees’ unvested incentive stock option (“ISO”) awards as of the respective closing dates. Approximately $0.4 million and $2.6 million of the fair value of the assumed ISO awards granted to acquired Tapingo and LevelUp employees, respectively, was attributable to the pre-combination services of the awardees and was included in the respective purchase prices. These amounts are reflected within goodwill in the respective purchase price allocations. As of the respective acquisition dates, aggregate post-combination expense of approximately $21.4 million is expected to be recognized related to the combined assumed ISO awards over the remaining post-combination service periods. The results of operations of Tapingo and LevelUp have been included in the Company’s financial statements since November 7, 2018 and September 13, 2018, respectively but did not have a material impact on the Company’s consolidated results of operations for the year ended December 31, 2018. The excess of the consideration transferred in the acquisitions over the amounts assigned to the fair value of the net assets was recorded as goodwill, which represents the value of LevelUp’s technology team, the ability to simplify integrations with restaurants on the Company’s platform and the expanded breadth and depth of the Company’s network of diners and campus relationships. The total goodwill related to the acquisitions of Tapingo and LevelUp of $429.4 million is not deductible for income tax purposes. The assets acquired and liabilities assumed of Tapingo and LevelUp were recorded at their estimated fair values as of the closing dates of November 7, 2018 and September 13, 2018, respectively. The purchase price allocation for Tapingo and LevelUp is subject to change within the measurement period as certain significant fair value estimates are subject to management review and approval. The following table summarizes the preliminary purchase price allocation acquisition-date fair values of the asset and liabilities acquired in connection with the Tapingo and LevelUp acquisitions: Tapingo LevelUp Total (in thousands) Accounts receivable $ 3,101 $ 6,201 $ 9,302 Prepaid expenses and other current assets 843 1,396 2,239 Property and equipment — 895 895 Other assets 163 — 163 Restaurant relationships 11,279 10,217 21,496 Diner acquisition — 3,912 3,912 Below-market lease intangible — 2,205 2,205 Developed technology 9,755 20,107 29,862 Goodwill 133,383 295,994 429,377 Net deferred tax asset (1,988 ) 31,621 29,633 Accounts payable and accrued expenses (4,478 ) (3,121 ) (7,599 ) Total purchase price net of cash acquired $ 152,058 $ 369,427 $ 521,485 Net working capital adjustment receivable 127 — 127 Fair value of assumed ISOs attributable to pre-combination service (372 ) (2,594 ) (2,966 ) Net cash paid $ 151,813 $ 366,833 $ 518,646 2017 Acquisitions On October 10, 2017, the Company acquired all of the issued and outstanding equity interests of Eat24, LLC (“Eat24”), a wholly owned subsidiary of Yelp Inc., for approximately $281.7 million, including $281.4 million in net cash paid and $0.3 million of other non-cash consideration. Of such amount, $28.8 million will be held in escrow for an 18-month period after closing to secure the Company’s indemnification rights under the purchase agreement. The acquisition expanded the breadth and depth of the Company’s national network of restaurant partners and active diners. The Company granted restricted stock unit (“RSU”) awards to acquired Eat24 employees in replacement of their unvested equity awards as of the closing date. Approximately $0.3 million of the fair value of the replacement RSU awards granted to acquired Eat24 employees was attributable to the pre-combination services of the Eat24 awardees and was included in the $281.7 million purchase price. This amount is reflected within goodwill in the purchase price allocation. As of the acquisition date, post-combination expense of approximately $4.1 million was expected to be recognized related to the replacement awards over the remaining post-combination service period. On August 23, 2017, the Company acquired substantially all of the assets and certain expressly specified liabilities of A&D Network Solutions, Inc. and Dashed, Inc. (collectively, “Foodler”). The purchase price for Foodler was $51.1 million in cash, net of cash acquired of $0.1 million. Foodler is an independent online food-ordering company with an established diner base in the Northeast United States. The acquisition expanded the breadth and depth of the Company’s restaurant network, active diners and delivery network. The results of operations of Eat24 and Foodler have been included in the Company’s financial statements since October 10, 2017 and August 23, 2017, respectively. The excess of the consideration transferred in the acquisitions over the net amounts assigned to the fair value of the assets was recorded as goodwill, which represents the value of increasing the breadth and depth of the Company’s network of restaurants and diners The assets acquired and liabilities assumed of Eat24 and Foodler were recorded at their estimated fair values as of the respective closing dates of October 10, 2017 and August 23, 2017. The following table summarizes the final purchase price allocation acquisition-date fair values of the assets and liabilities acquired in connection with the Eat24 and Foodler acquisitions: Eat24 Foodler Total (in thousands) Accounts receivable $ 8,267 $ 307 $ 8,574 Prepaid expenses and other current assets 221 — 221 Property and equipment 1,113 — 1,113 Restaurant relationships 126,232 35,217 161,449 Diner acquisition 35,226 1,354 36,580 Trademarks 2,225 74 2,299 Developed technology 2,559 1,955 4,514 Goodwill 135,955 17,452 153,407 Accounts payable and accrued expenses (30,082 ) (5,237 ) (35,319 ) Total purchase price net of cash acquired $ 281,716 $ 51,122 $ 332,838 Fair value of replacement RSUs attributable to pre-combination service (274 ) — (274 ) Net cash paid $ 281,442 $ 51,122 $ 332,564 2016 Acquisitions On May 5, 2016, the Company acquired all of the issued and outstanding stock of KMLEE Investments Inc. and LABite.com, Inc. (collectively, “LABite”). The purchase price for LABite was $65.8 million in cash, net of cash acquired of $2.6 million. LABite provides online and mobile food ordering and delivery services for restaurants in numerous western and southwestern cities of the United States. The acquisition expanded the Company’s restaurant, diner and delivery networks. The results of operations of LABite have been included in the Company’s financial statements since May 5, 2016. The excess of the consideration transferred in the acquisition over the net amounts assigned to the fair value of the assets acquired was recorded as goodwill, which represents the opportunity to expand restaurant delivery services and enhance the breadth and depth of the Company’s restaurant partners. Of the $40.2 million of goodwill related to the acquisition, $5.0 million is expected to be deductible for income tax purposes. The assets acquired and liabilities assumed of LABite were recorded at their estimated fair values as of the closing date of May 5, 2016. The following table summarizes the final purchase price allocation acquisition-date fair values of the assets and liabilities acquired in connection with the LABite acquisition: (in thousands) Accounts receivable $ 2,320 Prepaid expenses and other assets 68 Restaurant relationships 46,513 Property and equipment 257 Developed technology 1,731 Goodwill 40,235 Trademarks 440 Accounts payable and accrued expenses (6,303) Net deferred tax liability (19,412) Total purchase price net of cash acquired $ 65,849 Additional Information The estimated fair values of the intangible assets acquired were determined based on a combination of the income, cost, and market approaches to measure the fair value of the restaurant relationships, diner acquisition, developed technology and trademarks as follows: Valuation Method Tapingo LevelUp Eat24 Foodler Restaurant relationships Multi-period excess earnings With or without comparative business valuation Multi-period excess earnings Multi-period excess earnings Diner acquisition n/a Cost to recreate Cost to recreate Cost to recreate Developed technology Cost to recreate Multi-period excess earnings Cost to recreate Cost to recreate Trademark n/a n/a Relief from royalty Relief from royalty The fair value of the LevelUp below market lease was measured based on the present value of the difference between the contractual amounts to be paid pursuant to the lease and an estimate of current fair market lease rates measured over the non-cancelable remaining term of the lease. These fair value measurements were based on significant inputs not observable in the market and thus represent Level 3 measurements within the fair value hierarchy. The Company incurred certain expenses directly and indirectly related to acquisitions which were recognized in general and administrative expenses within the consolidated statements of operations for the year ended December 31, 2018, 2017 and 2016 of $6.9 Pro Forma (unaudited) The following unaudited pro forma information presents a summary of the operating results of the Company for the years ended December 31, 2018 2017 Year Ended December 31, 2018 2017 (in thousands, except per share data) (unaudited) Revenues $ 1,041,811 $ 782,895 Net income 55,975 41,008 Net income per share attributable to common shareholders: Basic $ 0.63 $ 0.48 Diluted $ 0.61 $ 0.46 The pro forma adjustments that reflect the amortization that would have been recognized for intangible assets, elimination of transaction costs incurred, stock-based compensation expense for replacement awards, interest expense for transaction financings and other adjustments, as well as the pro forma tax impact of such adjustments for the years ended December 31, 2018 2017 Year Ended December 31, 2018 2017 (in thousands) (unaudited) Depreciation and amortization $ 4,893 $ 16,588 Transaction costs (6,923 ) 1,293 Stock-based compensation 3,748 7,200 Interest expense 1,601 5,358 Other — 4,690 Income tax benefit (1,548 ) (15,098 ) The unaudited pro forma revenues and net income are not intended to represent or be indicative of the Company’s consolidated results of operations or financial condition that would have been reported had the acquisitions been completed as of the beginning of the

Marketable Securities

Marketable Securities	12 Months Ended
	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Marketable Securities	5. Marketable Securities The amortized cost, unrealized gains and losses and estimated fair value of the Company’s held-to-maturity marketable securities as of December 31, 2018 and 2017 were as follows: December 31, 2018 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (in thousands) Cash and cash equivalents Commercial paper $ 12,097 $ — $ (21 ) $ 12,076 Corporate bonds 870 — — 870 Short-term investments Commercial paper 13,334 — (88 ) 13,246 Corporate bonds 750 — — 750 Total $ 27,051 $ — $ (109 ) $ 26,942 December 31, 2017 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (in thousands) Cash and cash equivalents Commercial paper $ 39,979 $ — $ (43 ) $ 39,936 Corporate bonds 1,250 — — 1,250 Short-term investments Commercial paper 21,480 — (99 ) 21,381 Corporate bonds 2,125 — (1 ) 2,124 Total $ 64,834 $ — $ (143 ) $ 64,691 All of the Company’s marketable securities were classified as held-to-maturity investments and have maturities within one year of December 31, 2018. Approximately $40 million of the Company’s marketable securities matured during the year ended December 31, 2018, which was invested in other interest-bearing accounts upon maturity. The gross unrealized losses, estimated fair value and length of time the individual marketable securities were in a continuous loss position for those marketable securities in an unrealized loss position as of December 31, 2018 and 2017 were as follows: December 31, 2018 Less Than 12 Months 12 Months or Greater Total Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Estimated Fair Value Unrealized Loss (in thousands) Commercial paper $ 25,322 $ (109 ) $ — $ — $ 25,322 $ (109 ) Corporate bonds 750 — — — 750 — Total $ 26,072 $ (109 ) $ — $ — $ 26,072 $ (109 ) December 31, 2017 Less Than 12 Months 12 Months or Greater Total Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Estimated Fair Value Unrealized Loss (in thousands) Commercial paper $ 61,317 $ (142 ) $ — $ — $ 61,317 $ (142 ) Corporate bonds 3,374 (1 ) — — 3,374 (1 ) Total $ 64,691 $ (143 ) $ — $ — $ 64,691 $ (143 ) The Company recognized interest income during the years ended December 31, 2018, 2017 and 2016 of $4.0 million, $2.0 million and $1.3 million, respectively, within net interest (income) expense on the consolidated statements of operations. During the years ended December 31, 2018, 2017 and 2016, the Company did not recognize any other-than-temporary impairment losses related to its marketable securities. The Company’s marketable securities are classified within Level 2 of the fair value hierarchy (see Note 15, Fair Value Measurement ,

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangible Assets	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and Acquired Intangible Assets	6. Goodwill and Acquired Intangible Assets The components of acquired intangible assets as of December 31, 2018 and 2017 were as follows: December 31, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Value Gross Amount Accumulated Amortization Net Value (in thousands) Restaurant relationships $ 494,278 $ (103,457 ) $ 390,821 $ 457,580 $ (76,852 ) $ 380,728 Diner acquisition 47,541 (10,306 ) 37,235 40,247 (1,906 ) 38,341 Developed technology 38,385 (10,247 ) 28,138 8,523 (6,418 ) 2,105 Trademarks 2,225 (2,225 ) — 2,225 (402 ) 1,823 Below-market lease intangible 2,206 (124 ) 2,082 — — — Other 3,676 (2,615 ) 1,061 6,888 (4,008 ) 2,880 Total amortizable intangible assets 588,311 (128,974 ) 459,337 515,463 (89,586 ) 425,877 Indefinite-lived trademarks 89,676 — 89,676 89,676 — 89,676 Total acquired intangible assets $ 677,987 $ (128,974 ) $ 549,013 $ 605,139 $ (89,586 ) $ 515,553 The gross carrying amount and accumulated amortization of the Company’s intangible assets as of December 31, 2018 were adjusted by $3.2 million and $2.5 million, respectively, for certain assets that were no longer in use. The changes in the carrying amount of goodwill during the years ended December 31, 2018 and 2017 were as follows. Goodwill Accumulated Impairment Losses Net Book Value (in thousands) Balance as of December 31, 2016 $ 436,455 $ — $ 436,455 Acquisitions 153,407 — 153,407 Balance as of December 31, 2017 $ 589,862 $ — $ 589,862 Acquisitions 429,377 — 429,377 Balance as of December 31, 2018 $ 1,019,239 $ — $ 1,019,239 In October 2018, the Company completed the acquisition of substantially all of the restaurant and diner network assets The Company previously completed the acquisition of certain assets of OrderUp from Groupon, Inc. in September 2017. During the year ended December 31, 2018, the Company recorded additions to acquired intangible assets of $76.1 million as a result of the acquisitions of LevelUp and Tapingo and the acquisition of certain assets of OrderUp. During the year ended December 31, , the Company recorded additions to acquired intangible assets of million as a result of the acquisitions of Eat24 and Foodler, the acquisition of certain assets of OrderUp and payments made to Zoomer, Inc. The components of the acquired intangible assets added during the years ended December 31, 2018 and 2017 were as follows: Year Ended December 31, 2018 Year Ended December 31, 2017 Amount Weighted-Average Amortization Period Amount Weighted-Average Amortization Period (in thousands) (years) (in thousands) (years) Restaurant relationships $ 36,697 17.5 $ 177,929 19.3 Developed technology 29,862 4.7 4,514 0.5 Diner acquisition 7,294 5.0 40,247 5.0 Below-market lease intangible 2,205 5.8 — Trademarks — 2,299 1.2 Other — 5,000 2.8 Total $ 76,058 $ 229,989 Estimated future amortization expense of acquired intangible assets as of December 31, 2018 was as follows: (in thousands) 2019 $ 47,445 2020 44,770 2021 39,120 2022 37,150 2023 30,644 Thereafter 260,208 Total $ 459,337 As of December 31, 2018, the estimated remaining weighted-average useful life of the Company’s acquired intangibles was 13.9 years. The Company recognizes amortization expense for acquired intangibles on a straight-line basis.

Property and Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Property and Equipment	7. Property and Equipment The components of the Company’s property and equipment as of December 31, 2018 and 2017 were as follows: December 31, 2018 December 31, 2017 (in thousands) Developed software $ 90,302 $ 52,041 Computer equipment 50,767 31,601 Leasehold improvements 39,550 23,400 Furniture and fixtures 10,801 6,857 Purchased software and digital assets 4,696 2,881 Construction in progress 1,976 — Property and equipment 198,092 116,780 Accumulated depreciation and amortization (78,597 ) (45,396 ) Property and equipment, net $ 119,495 $ 71,384 The Company recorded depreciation and amortization expense for property and equipment other than developed software for the years ended December 31, 2018, 2017 and 2016 of $21.6 million, $11.7 million and $8.9 million, respectively. The gross carrying amount and accumulated amortization of the Company’s leasehold improvements, developed software, furniture and fixtures and purchased software and digital assets as of December 31, 2018 were adjusted in aggregate by $10.3 million and $9.8 million, respectively, for certain assets that were no longer in use. The Company capitalized developed software costs of $41.1 million, $26.0 million and $15.6 million for the years ended December 31, 2018, 2017 and 2016, respectively. Amortization expense for developed software costs, recognized in depreciation and amortization in the consolidated statements of operations, for the years ended December 31, 2018, 2017 and 2016 was $21.8 million, $12.0 million and $5.4 million, respectively.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	8. Commitments and Contingencies Office Facility Leases As of December 31, 2018, the Company had various operating lease agreements for its office facilities which expire at various dates through September 2029. The terms of the lease agreements provide for rental payments on a graduated basis. For its primary operating leases, the Company can, after the initial lease term, renew its leases under right of first offer terms at fair value at the time of renewal for a period of five years. The Company recognizes rent expense on a straight-line basis over the lease term. Rental expense, primarily for leased office space under the operating lease commitments, was $13.1 million, $7.5 million and $5.6 million for the years ended December 31, 2018, 2017 and 2016, respectively. Future minimum lease payments under the Company’s operating lease agreements that have initial or remaining non-cancelable lease terms in excess of one year as of December 31, 2018 were as follows: (in thousands) 2019 $ 13,009 2020 14,874 2021 14,243 2022 12,219 2023 12,220 Thereafter 57,503 Total $ 124,068 The table above does not reflect the Company’s option to exercise early termination rights or the payment of related early termination fees. Legal In August 2011, Ameranth, Inc. (“Ameranth”) filed a patent infringement action against a number of defendants, including Grubhub Holdings Inc., in the U.S. District Court for the Southern District of California (the “Court”), Case No. 3:11-cv-1810 (“’1810 action”). Ameranth subsequently initiated additional actions for infringement of a related patent, including separate actions against Grubhub Holdings Inc., Case No. 3:12-cv-739, and Seamless North America, LLC, Case No. 3:12-cv-737, which were consolidated along with approximately 40 other cases Ameranth filed in the same district. In September 2018, the district court granted summary judgment (on another defendant’s motion) of unpatentability on the sole remaining patent and vacated the December 3, 2018 jury trial date for the claims against Grubhub Holdings Inc. and Seamless North America, LLC. In October 2018, the district court entered final judgment on all claims in the case in which summary judgment was granted, and then stayed the remaining cases (including the cases against Grubhub and Seamless). In addition to the matter described above, from time to time, the Company is involved in various other legal proceedings arising from the normal course of business activities, including labor and employment claims, some of which relate to the alleged misclassification of independent contractors. In September 2015, a claim was brought in the United States District Court for the Northern District of California under the Private Attorneys General Act by an individual plaintiff on behalf of himself and seeking to represent other drivers and the State of California. The claim sought monetary penalties and injunctive relief for alleged violations of the California Labor Code based on the alleged misclassification of drivers as independent contractors. The Company does not believe any of the foregoing claims will have a material impact on its consolidated financial statements. However, Indemnification In connection with the merger of Seamless North America, LLC, Seamless Holdings Corporation and Grubhub Holdings Inc. in August 2013, the Company agreed to indemnify Aramark Holdings Corporation for negative income tax consequences associated with the October 2012 spin-off of Seamless Holdings Corporation that were the result of certain actions taken by the Company through October 29, 2014, in certain instances subject to a $15.0 million limitation. Management is not aware of any actions that would impact the indemnification obligation.

Debt

Debt	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Debt	9. Debt The following table summarizes the carrying value of the Company’s debt as of December 31, 2018: December 31, 2018 December 31, 2017 (in thousands) Term loan $ 120,312 $ 124,219 Revolving loan 222,000 50,000 Total debt $ 342,312 $ 174,219 Less current portion (6,250 ) (3,906 ) Less unamortized deferred debt issuance costs (514 ) (668 ) Long-term debt $ 335,548 $ 169,645 On October 10, 2017, the Company entered into a credit agreement which provided, among other things, for aggregate revolving loans up to $225 million and term loans in an aggregate principal amount of $125 million (the “Previous Credit Agreement”). In addition, the Company was permitted to incur up to $150 million of incremental revolving loans or incremental term loans pursuant to the terms and conditions of the Previous Credit Agreement. The credit facility under the Previous Credit Agreement was due to expire on the Company refinanced the Previous Credit Agreement on February 6, 2019 (see Note 16, Subsequent Events , for additional details). During the year ended December 31, 2018, the Company borrowed $222.0 million of revolving loans under the Previous Credit Agreement. The Company utilized the revolving loan proceeds to finance a portion of the purchase price and transaction costs in connection with the acquisitions of Tapingo and LevelUp. During the year ended December 31, 2018, the Company made principal payments of $53.9 million from cash on hand. The fair value of the Company’s outstanding debt approximates its carrying value as of December 31, 2018 (see Note 15, Fair Value Measurement , for additional details). Under the Previous Credit Agreement, borrowings bore interest, at the Company’s option, based on LIBOR or an alternate base rate plus a margin. In the case of LIBOR loans, the margin ranged between 1.25% and 2.00% and, in the case of alternate base rate loans, between 0.25% and 1.0%, in each case, based upon the Company’s consolidated leverage ratio (as defined in the Previous Credit Agreement). The Company was also required to pay a commitment fee on the undrawn portion available under the revolving loan facility of between 0.20% and 0.30% per annum, based upon the Company’s consolidated leverage ratio. As of December 31, 2018 and 2017, total unamortized debt issuance costs of $1.9 million and $2.6 million, respectively, were recorded as other assets and as a reduction of long-term debt on the consolidated balance sheets in proportion to the borrowing capacities of the revolving and term loans. Interest expense includes interest on outstanding borrowings, amortization of debt issuance costs and commitment fees on the undrawn portion available under the Previous Credit Agreement. During the years ended December 31, 2018, 2017 and 2016, the Company recognized interest expense of $7.5 million, $2.1 million, and $0.6 million, respectively. The effective interest rate, including amortization of debt issuance costs and commitment fees, for borrowings under the Previous Credit Agreement for the years ended December 31, 2018 and 2017 was 3.82% and 3.00%, respectively. The obligations under the Previous Credit Agreement and the guarantees were secured by a lien on substantially all of the tangible and intangible property of the Company and the domestic subsidiaries that are guarantors, and by a pledge of all of the equity interests of the Company’s domestic subsidiaries, subject to certain exceptions set forth in the Previous Credit Agreement. The Previous Credit Agreement contained customary covenants that, among other things, required the Company to satisfy certain financial covenants and restricted the Company’s ability to incur additional debt, pay dividends and make distributions, make certain investments and acquisitions, create liens, transfer and sell material assets and merge or consolidate. The Company was in compliance with the covenants as of December 31, 2018. Future maturities of principal payments, excluding potential early payments, as of December 31, 2018 under the Previous Credit Agreement were as follows: (in thousands) 2019 $ 6,250 2020 6,250 2021 7,031 2022 322,781 Total $ 342,312

Stock-Based Compensation

Stock-Based Compensation	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	10. Stock-Based Compensation In May 2015, the Company’s stockholders approved the Grubhub Inc. 2015 Long-Term Incentive Plan (the “2015 Plan”), pursuant to which the Compensation Committee of the Board of Directors may grant stock options, stock appreciation rights, restricted stock awards, restricted stock units, performance awards and other stock-based and cash-based awards. On May 20, 2015, the Company filed a registration statement on Form S-8 to register up to 14,256,901 shares of common stock reserved for issuance pursuant to awards granted under the 2015 Plan. Effective May 20, 2015, no further grants will be made under the Company’s 2013 Omnibus Incentive Plan (the “2013 Plan”). As of December 31, , there were 3,729,176 shares of common stock authorized and available . On November 7, 2018 and September 14, 2018, the Company filed registration statements on Form S-8 to register up to 91,338 and 236,414 shares of common stock reserved for issuance pursuant to unvested assumed stock options granted under the respective incentive plans previously established by Tapingo and LevelUp. No further grants will be made under the assumed Tapingo and LevelUp incentive plans. The Company has granted non-qualified and incentive stock options, restricted stock units and restricted stock awards under its incentive plans. The Company recognizes compensation expense based on estimated grant date fair values for all stock-based awards issued to employees and directors, including stock options, restricted stock units and restricted stock awards. For all stock options outstanding as of December 31, 2018, the exercise price of the stock options equals the fair value of the stock option on the grant date. The stock options and restricted stock units vest over different lengths of time, but generally over 4 years, and are subject to forfeiture upon termination of employment prior to vesting. The maximum term for stock options issued to employees under the 2015 Plan, the 2013 Plan and the assumed Tapingo and LevelUp incentive plans is 10 years, and they expire 10 years from the date of grant. Compensation expense for stock options, restricted stock units and restricted stock awards is recognized ratably over the vesting period. The rights granted to the recipient of a restricted stock unit generally accrue over the vesting period. Participants holding restricted stock units are not entitled to any ordinary cash dividends paid by the Company with respect to such shares unless otherwise provided by the terms of the award. The Company does not expect to pay any dividends in the foreseeable future. The recipient of a restricted stock award shall have all of the rights of a holder of shares of the Company’s common stock, including the right to receive dividends, if any, the right to vote such shares and, upon the full vesting of the restricted stock awards, the right to tender such shares. The payment of any dividends will be deferred until the restricted stock awards have fully vested. The Company’s restricted stock awards generally vest over 2 years and are subject to forfeiture upon termination of employment prior to vesting unless otherwise provided in the terms of the award agreement. Stock-based Compensation Expense The total stock-based compensation expense related to all stock-based awards was $55.3 million, $32.7 million and $23.6 As of December 31, , $169.4 million of total unrecognized stock-based compensation expense is expected to be recognized over a weighted-average period of 2.9 years. Excess tax benefits reflect the total realized value of the Company’s tax deductions from individual stock option exercise transactions and the vesting of restricted stock awards and restricted stock units in excess of the deferred tax assets that were previously recorded. During the years ended December 31, 2018 and , the Company recognized excess tax benefits from stock-based compensation of $15.9 million and $7.1 million, respectively, within income tax (benefit) expense on the consolidated statements of operations and within cash flows from operating activities on the consolidated statements of cash flows. years The Company capitalized stock-based compensation expense as website and software development costs of $9.0 Stock Options The Company granted 347,891, 618,899 and 166,272 stock options under the 2015 Plan during the years ended December 31, 2018, 2017 and 2016, respectively. In 2018, the Company also assumed 327,752 unvested ISOs with the acquisitions of LevelUp and Tapingo. The fair value of each stock option award was estimated based on the assumptions below as of the grant date using the Black-Scholes-Merton option pricing model. Beginning in the first quarter of 2018, expected volatility is based on the historical and implied volatilities of the Company’s own common stock . The Company uses historical data to estimate option exercises and employee terminations within the valuation model. Separate groups of employees that have similar historical exercise behavior are considered separately for valuation purposes. The expected term calculation for option awards considers a combination of the Company’s historical and estimated future exercise behavior. The risk-free rate for the period within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant. The assumptions used to determine the fair value of the stock options granted during the years ended December 31, 2018, 2017 and 2016 were as follows: Year Ended December 31, 2018 2017 2016 Weighted-average fair value options granted $ 66.19 $ 15.19 $ 12.59 Average risk-free interest rate 2.61 % 1.65 % 1.41 % Expected stock price volatility (a) 46.4 % 48.7 % 49.7 % Dividend yield None None None Expected stock option life (years) (b) 3.51 4.00 5.84 (a) Prior to the first quarter of 2018, the expected stock price volatility was based on a combination of the historical and implied volatilities of comparable publicly-traded companies and the historical volatility of the Company’s own common stock due to its limited trading history as there was no active external or internal market for the Company’s common stock prior to the Company’s initial public offering in April 2014. (b) The expected term for Tapingo and LevelUp assumed ISO awards was calculated based on their respective remaining vesting periods as of the acquisition date. During the year ended December 31, 2016, the expected term of option awards was estimated using a simplified method due to the limited period of time stock-based awards had been exercisable. ____________________________________________________________________________________________________________________ Stock option awards as of December 31, 2018 and 2017, and changes during the year ended December 31, 2018, were as follows: Options Weighted-Average Exercise Price Aggregate Intrinsic Value (thousands) Weighted-Average Exercise Term (years) Outstanding at December 31, 2017 2,705,849 $ 25.53 $ 125,197 7.28 Granted 675,643 62.89 Forfeited (206,986 ) 46.27 Exercised (523,667 ) 27.10 Outstanding at December 31, 2018 2,650,839 33.13 120,977 6.87 Vested and expected to vest at December 31, 2018 2,649,081 33.11 120,926 6.87 Exercisable at December 31, 2018 1,599,731 $ 22.91 $ 86,880 6.03 The aggregate intrinsic value in the table above represents the total pre-tax intrinsic value (the difference between the fair value of the common stock and the exercise price, multiplied by the number of in-the-money options) that would have been received by the option holders had all option holders exercised their in-the-money options on each date. The aggregate intrinsic value of assumed Tapingo and LevelUp ISOs as of December 31, 2018 was approximately $13.1 million. This amount will change in future periods based on the fair value of the Company’s stock and the number of options outstanding. The aggregate intrinsic value of awards exercised during the years ended December 31, 2018, 2017 and 2016 was $38.7 million, $19.5 million and $30.2 million, respectively. The Company recorded compensation expense for stock options of $17.7 million, $11.8 million and $12.3 million for the years ended December 31, 2018, 2017 and 2016, respectively. As of December 31, 2018, total unrecognized compensation cost, adjusted for estimated forfeitures, related to non-vested stock options was $34.2 million and is expected to be recognized over a weighted-average period of 2.5 years, including aggregate remaining post-combination expense of approximately $11.7 million expected to be recognized related to the assumed Tapingo and LevelUp ISO awards. Restricted Stock Units and Restricted Stock Awards Non-vested restricted stock units as of December 31, 2018 and 2017, and changes during the year ended December 31, 2018 were as follows: Restricted Stock Units Shares Weighted-Average Grant Date Fair Value Outstanding at December 31, 2017 2,454,801 $ 37.56 Granted 1,325,499 94.41 Forfeited (462,684 ) 52.72 Vested (988,759 ) 36.55 Outstanding at December 31, 2018 2,328,857 $ 67.33 C ompensation expense related to restricted stock units was $37.6 , 2017 and 2016, respectively 2016 Each of the compensation expense recognized and the vest date aggregate fair value of vested awards related to restricted stock awards was $1.7 million during the year ended December 31, 2016 . There were no non-vested restricted stock awards or related expense during the years ended . December 31, 2018

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The Company files income tax returns in the U.S. federal, the United Kingdom (“U.K.”), Israel and various state jurisdictions. For the years ended December 31, 2018, 2017 and 2016, the income tax provision was comprised of the following: Year Ended December 31, 2018 2017 2016 (in thousands) Current: Federal $ (2,934 ) $ 16,852 $ 24,509 State 3,827 4,721 8,132 Foreign 335 271 338 Total current 1,228 21,844 32,979 Deferred: Federal 2,608 (30,794 ) 800 State (884 ) (385 ) 516 Total deferred 1,724 (31,179 ) 1,316 Total income tax (benefit) expense $ 2,952 $ (9,335 ) $ 34,295 Income before provision for income taxes for the years ended December 31, 2018, 2017 and 2016, was as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Domestic source $ 80,878 $ 88,357 $ 82,033 Foreign source 555 1,291 1,819 Income before provision for income taxes $ 81,433 $ 89,648 $ 83,852 The following is a reconciliation of income taxes computed at the U.S. federal statutory rate to the income taxes reported in the consolidated statements of operations for the years ended December 31, 2018, 2017 and 2016: Year Ended December 31, 2018 2017 2016 (in thousands) Income tax expense at statutory rate $ 17,101 $ 31,377 $ 29,348 State income taxes 1,248 5,011 5,621 Effect of federal rate change — (36,768 ) — Stock-based compensation (15,924 ) (7,072 ) — Excess compensation 1,753 — — Research and development tax credit (1,470 ) (800 ) (638 ) Uncertain tax position (545 ) (55 ) — Foreign rate differential (57 ) (203 ) (273 ) Unremitted earnings tax — 363 — All other 846 (1,188 ) 237 Total income tax (benefit) expense $ 2,952 $ (9,335 ) $ 34,295 On December 22, 2017, the U.S. legislature enacted the Tax Act resulting in significant modifications to the tax law. The Company completed its determination of the accounting effects of the Tax Act in the period it was enacted. The Tax Act reduced the corporate income tax rate from 35% to 21%, subjected certain foreign earnings on which U.S. income tax was previously deferred to a one-time transition tax, as well as other changes. As a result of the Tax Act, the Company incurred an incremental income tax benefit of $34.1 million during the year ended December 31, 2017, which consisted primarily of the remeasurement of deferred tax assets and liabilities at the 21% corporate income tax rate and the one-time transition tax on accumulated foreign earnings of $0.4 million. The tax effects of temporary differences giving rise to deferred income tax assets and liabilities as of December 31, 2018 and 2017 were as follows: As of December 31, 2018 2017 (in thousands) Deferred tax assets: Loss and credit carryforwards $ 72,466 $ 11,184 Accrued expenses 4,128 2,089 Stock-based compensation 8,832 9,914 Fixed assets - state 2,295 — Total deferred tax assets 87,721 23,187 Valuation allowance (23,840 ) (4,803 ) Net deferred tax assets 63,881 18,384 Deferred tax liabilities: Fixed assets (8,607 ) (5,909 ) Intangible assets (101,451 ) (86,462 ) Prepaid expenses (206 ) (305 ) Total deferred tax liabilities (110,264 ) (92,676 ) Net deferred tax liability $ (46,383 ) $ (74,292 ) The Company classified its net deferred tax liabilities as long-term liabilities on the consolidated balance sheets as of December 31, 2018 and 2017. A partial valuation reserve of $8.4 million and $4.8 million was recorded as of December 31, 2018 and 2017, respectively, against certain state-only credits as those credits have a short carryover period and the Company believes that this portion of the credit carryovers will more likely than not expire before they are utilized. The Company also recorded a full valuation allowance as of December 31, 2018 of $15.4 million on Israeli net operating losses (“NOLs”) as it is more likely than not that these will not be utilized. The Tax Act generally allows companies to repatriate future foreign source earnings without incurring additional U.S. taxes by providing a 100% exemption for the foreign source portion of dividends from certain foreign subsidiaries. As a result, the Company plans to repatriate cash from its foreign subsidiaries to the U.S. in the future. The Company estimated no additional tax liability as there are no applicable withholding taxes for the repatriation of unremitted earnings of its foreign subsidiaries. The Company had the following tax loss and credit carryforwards as of December 31, 2018 and 2017: 2018 2017 Beginning Year of Expiration (in thousands) U.S. federal loss carryforwards $ 29,853 $ 595 2027 U.S. state and local loss carryforwards 18,147 4,362 2027 Israeli loss carryforward 15,382 — Indefinite Illinois Edge Credits (a) 11,992 8,422 2018 Federal research and development credit 1,986 — 2028 State research and development credit 1,710 — 2018 (a) Amounts are before the federal benefit of state tax. __________________________________________________________________________________________________ The adoption of ASU 2016-09 resulted in a $2.6 million cumulative effect adjustment to retained earnings, including the federal benefit of state taxes, on the consolidated balance sheets as of January 1, 2017. In July 2018, the examination in New York for corporate income tax returns for the tax years ended December 31, 2014, 2015 and 2016 was completed with no material findings. The Company does not expect any material additional tax liabilities, penalties and/or interest as a result of the audit. The Company’s tax returns are subject to the normal statute of limitations, three years from the filing date for federal income tax purposes. The federal and state statute of limitations generally remain open for years in which tax losses are generated until three years from the year those losses are utilized. Under these rules, the 2006 and later year NOLs of Slick City Media, Inc. are still subject to audit by the IRS and state and local jurisdictions. Also, the 2007 and later year NOLs of Grubhub Holdings Inc. and its acquired businesses are still subject to audit by the IRS and state and local jurisdictions. The December 31, 2015 and later period U.K. returns of Seamless Europe Ltd. are subject to examination by the U.K. tax authorities. The December 31, 2014 and later period Israeli returns of Tapingo Ltd. are subject to exam by the Israeli tax authorities. The Company is subject to taxation in the U.S. federal and various state jurisdictions. Significant judgment is required in determining the provision for income taxes and recording the related income tax assets and liabilities. The Company’s practice for accounting for uncertainty in income taxes is to recognize the financial statement benefit of a tax position only after determining that the relevant tax authority would more likely than not sustain the position following an audit. For tax positions meeting the more-likely-than-not criteria, the amount recognized in the financial statements is the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the relevant tax authority. The following table summarizes the Company’s unrecognized tax benefit activity during the years ended December 31, 2018 and 2017, excluding the related accrual for interest: As of December 31, 2018 2017 (in thousands) Balance at beginning of period $ 2,864 $ 3,345 Reductions for tax positions taken in prior years (2,260 ) (937 ) Additions for tax positions taken in the current year 147 456 Balance at end of period $ 751 $ 2,864 Included in the net deferred tax liabilities on the consolidated balance sheets as of December 31, 2018 and 2017 were deferred tax assets that relate to the potential settlement of these unrecognized tax benefits. As of December 31, 2018, the remaining reserve related to the Company’s New York and New York City unitary position for the year ending December 31, 2014 was reversed due to the closing of the statute of limitations. The remaining reserve relates to research and development credits. The Company records interest and penalties, if any, as a component of its income tax (benefit) expense in the consolidated statements of operations. No interest expense or penalties were recognized during the year ended December 31, 2018. Interest expense of less than $0.1 million and no penalties were recognized during the year ended December 31, 2017.

Stockholders' Equity

Stockholders' Equity	12 Months Ended
	Dec. 31, 2018
Equity [Abstract]
Stockholders' Equity	12. Stockholders’ Equity As of December 31, 2018 and 2017, the Company was authorized to issue two classes of stock: common stock and preferred stock. Common Stock Each holder of common stock has one vote per share of common stock held on all matters that are submitted for stockholder vote. At December 31, 2018 and 2017, there were 500,000,000 shares of common stock authorized. At December 31, 2018 and 2017, there were 90,756,548 and 86,790,624 shares of common stock issued and outstanding, respectively. The Company did not hold any shares as treasury shares as of December 31, 2018 and 2017. On April 25, 2018, the Company issued and sold 2,820,464 shares of the Company’s common stock to Yum Restaurant Services Group, LLC (the “Investor”), a wholly owned subsidiary of Yum! Brands, Inc., for an aggregate purchase price of $200 million pursuant to an investment agreement dated February 7, 2018, by and between the Company and the Investor. The Company has used and expects to use the proceeds for general corporate purposes. On January 22, 2016, the Company’s Board of Directors approved a program that authorizes the repurchase of up to $100 million of the Company’s common stock exclusive of any fees, commissions or other expenses relating to such repurchases through open market purchases or privately negotiated transactions at the prevailing market price at the time of purchase. The repurchase program was announced on January 25, 2016. Repurchased stock may be retired or held as authorized but unissued treasury shares. The repurchase authorizations do not obligate the Company to acquire any particular amount of common stock or adopt any particular method of repurchase and may be modified, suspended or terminated at any time at management’s discretion. Repurchased and retired shares will result in an immediate reduction of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted net income per share at the time of the transaction. During the years ended December 31, 2018 and 2017, the Company did not repurchase any shares of its common stock. In 2016, the Company repurchased and retired 724,473 shares of its common stock at a weighted-average share price of $20.37, or an aggregate of $14.8 million. Preferred Stock The Company was authorized to issue 25,000,000 shares of preferred stock as of December 31, 2018 and 2017. There were no issued or outstanding shares of preferred stock as of December 31, 2018 and 2017.

Retirement Plan

Retirement Plan	12 Months Ended
	Dec. 31, 2018
Compensation And Retirement Disclosure [Abstract]
Retirement Plan	13. Retirement Plan Beginning February 1, 2012, the Company has maintained a defined contribution plan for employees. The plan is qualified under section 401(k) of the Internal Revenue Code. The Company may also make discretionary profit sharing contributions as determined by the Company’s Board of Directors. The Company matched 100% of the first 3% of employees’ contributions of eligible compensation and 50% of the next 2% of employees’ contributions of eligible compensation during the years ended December 31, 2018, 2017 and 2016 and recognized matching contributions expense of $3.5 million, $2.3 million and $1.7 million, respectively.

Earnings Per Share Attributable

Earnings Per Share Attributable to Common Stockholders	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Earnings Per Share Attributable to Common Stockholders	14. Earnings Per Share Attributable to Common Stockholders Basic earnings per share is computed by dividing net income attributable to common stockholders by the weighted-average number of common shares outstanding during the period without consideration for common stock equivalents. Diluted net income per share attributable to common stockholders is computed by dividing net income by the weighted-average number of common shares outstanding during the period and potentially dilutive common stock equivalents, including stock options, restricted stock units and restricted stock awards, except in cases where the effect of the common stock equivalent would be antidilutive. Potential common stock equivalents consist of common stock issuable upon exercise of stock options and vesting of restricted stock units and restricted stock awards using the treasury stock method. The sale of 2,820,464 shares of the Company’s common stock to the Investor on April 25, 2018 resulted in an immediate increase in the outstanding shares used to calculate the weighted-average common shares outstanding for the year ended December 31, 2018 Stockholders’ Equity The following table presents the calculation of basic and diluted net income per share attributable to common stockholders for the years ended December 31, 2018, 2017 and 2016: Year Ended December 31, 2018 2017 2016 (in thousands, except per share data) Basic earnings per share: Net income attributable to common stockholders (numerator) $ 78,481 $ 98,983 $ 49,557 Shares used in computation (denominator) Weighted-average common shares outstanding 89,447 86,297 85,069 Basic earnings per share $ 0.88 $ 1.15 $ 0.58 Diluted earnings per share: Net income attributable to common stockholders (numerator) $ 78,481 $ 98,983 $ 49,557 Shares used in computation (denominator) Weighted-average common shares outstanding 89,447 86,297 85,069 Effect of dilutive securities: Stock options 1,601 1,059 792 Restricted stock units and restricted stock awards 1,306 826 274 Weighted-average diluted shares 92,354 88,182 86,135 (a) Diluted earnings per share $ 0.85 $ 1.12 $ 0.58 (a) Prior to the adoption of ASU 2016-09, the treasury stock method calculation of weighted-average dilutive shares outstanding for the year ended December 31, 2016 included the estimated impact of tax benefits and deficiencies. During the year ended December 31, 2016, the Company repurchased and retired 724,473 shares of its common stock at a weighted-average share price of $20.37, or an aggregate of $14.8 million. The repurchases resulted in a reduction of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted net earnings per share from the dates of the repurchases. See Note 12, Stockholders' Equity The number of shares of common stock underlying stock-based awards excluded from the calculation of diluted net income per share attributable to common stockholders because their effect would have been antidilutive for the years ended December 31, were as follows: Year Ended December 31, 2018 2017 2016 Anti-dilutive shares underlying stock-based awards: Stock options 216,451 — 552,108 Restricted stock units 222,984 35,646 212,170

Fair Value Measurement

Fair Value Measurement	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurement	15. Fair Value Measurement Certain assets and liabilities are required to be recorded at fair value on a recurring basis. Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. The standards also establish a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The accounting guidance for fair value measurements prioritizes valuation methodologies based on the reliability of the inputs in the following three-tier value hierarchy: Level 1 Quoted prices in active markets for identical assets or liabilities. Level 2 Assets and liabilities valued based on observable market data for similar instruments, such as quoted prices for similar assets or liabilities. Level 3 Unobservable inputs that are supported by little or no market activity; instruments valued based on the best available data, some of which is internally developed, and considers risk premiums that a market participant would require. The Company applied the following methods and assumptions in estimating its fair value measurements. The Company’s commercial paper, investments in corporate bonds and certain money market funds are classified as Level 2 within the fair value hierarchy because they are valued using inputs other than quoted prices in active markets that are observable directly or indirectly. The Company’s long-term debt is classified as Level 3 within the fair value hierarchy because it is valued using an income approach, which utilizes a discounted cash flow technique that considers the credit profile of the Company. Accounts receivable, restaurant food liability and accounts payable approximate fair value due to their generally short-term maturities. The following table presents the fair value, for disclosure purposes only, and carrying value of the Company’s assets and liabilities that are recorded at other than fair value as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 Level 2 Level 3 Carrying Value Level 2 Level 3 Carrying Value (in thousands) Assets Money market funds $ 61 $ — $ 61 $ 93 $ — $ 93 Commercial paper 25,322 — 25,431 61,317 — 61,459 Corporate bonds 1,620 — 1,620 3,374 — 3,375 Total assets $ 27,003 $ — $ 27,112 $ 64,784 $ — $ 64,927 Liabilities Long-term debt, including current maturities $ — $ 342,745 $ 342,312 $ — $ 175,700 $ 174,219 Total liabilities $ — $ 342,745 $ 342,312 $ — $ 175,700 $ 174,219 The Company is required to record certain assets and liabilities at fair value on a nonrecurring basis, generally as a result of acquisitions. See Note 4, Acquisitions

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	16. Subsequent Events On February 6, 2019, the Company entered into an Amended and Restated Credit Agreement (the “Credit Agreement”) which provides, among other things, for aggregate revolving loans up to $225 million and term loans in an aggregate principal amount of $325 million. In addition, the Company may incur up to $250 million of incremental revolving loans or incremental term loans pursuant to the terms and conditions of the Credit Agreement. The credit facility will be available to the Company until February 5, 2024. The Credit Agreement replaced the Company’s $350.0 million Previous Credit Agreement. Under the Credit Agreement, borrowings bear interest, at the Company’s option, based on LIBOR or an alternate base rate plus a margin. In the case of LIBOR loans the margin ranges between 1.125% and 1.175% and, in the case of alternate base rate loans, between 0.125% and 0.75%, in each case, based upon the Company’s consolidated senior secured net leverage ratio (as defined in the Credit Agreement). The obligations under the Credit Agreement and the guarantees are secured by a lien on substantially all of the tangible and intangible property of the Company and the domestic subsidiaries that are guarantors, and by a pledge of all of the equity interests of the Company’s domestic subsidiaries, subject to certain exceptions set forth in the Credit Agreement. As of the filing of this Annual Report on Form 10-K, outstanding borrowings under the Credit Agreement were $342.3 million, including $325.0 million of term loans and $17.3 million of revolving loans. Additional capacity under the Credit Agreement may be used for general corporate purposes. The Credit Agreement contains customary covenants that, among other things, require the Company to satisfy certain financial covenants and may restrict the Company’s ability to incur additional debt, pay dividends and make distributions, make certain investments and acquisitions, create liens, transfer and sell material assets and merge or consolidate. The Company incurred loan origination fees at closing of the Credit Agreement and other expenses related to the financing of the facility of $1.5 million, which, in addition to $1.8 million of the remaining unamortized balance of loan origination costs under the Previous Credit Agreement, will be deferred on the consolidated balance sheets and amortized over the term of the new facility.

Summary of Significant Accoun_2

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The Company’s consolidated financial statements were prepared in conformity with accounting principles generally accepted in the United States of America (“GAAP”). The accompanying consolidated financial statements include all wholly-owned subsidiaries. All significant intercompany accounts and transactions have been eliminated. The consolidated statements of operations include the results of entities acquired from the dates of the acquisitions for accounting purposes. On January 1, 2018, the Company adopted Financial Accounting Standards Board (the “FASB”) Revenue from Contracts with Customers Recently Issued Accounting Pronouncements Revenue,
Changes in Accounting Principle	Changes in Accounting Principle See “ Recently Issued Accounting Pronouncements ” below for a description of accounting principle changes adopted during the year ended December 31, 2018 related to revenue and the statement of cash flows.
Use of Estimates	Use of Estimates The preparation of consolidated financial statements in conformity with GAAP requires management to make certain estimates, judgments and assumptions that affect the reported amounts of assets and liabilities and the related disclosures at the date of the financial statements, as well as the reported amounts of revenue and expenses during the periods presented. Estimates include revenue recognition, the allowance for doubtful accounts, website and internal-use software development costs, goodwill, depreciable lives of property and equipment, recoverability of intangible assets with finite lives and other long-lived assets and stock-based compensation. To the extent there are material differences between these estimates, judgments or assumptions and actual results, the Company’s consolidated financial statements will be affected. In many cases, the accounting treatment of a particular transaction is specifically dictated by GAAP and does not require management’s judgment in its application.
Cash and Cash Equivalents	Cash and Cash Equivalents Cash includes demand deposits with banks or financial institutions. Cash equivalents include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and that are so near their maturity that they present minimal risk of changes in value because of changes in interest rates. The Company’s cash equivalents include only investments with original maturities of three months or less. The Company regularly maintains cash in excess of federally insured limits at financial institutions. Cash and cash equivalents excludes the Company’s restricted cash balances of $4.6 million and $4.1 million as of December 31, 2018 and 2017, respectively, which are included within prepaid expenses and other current assets and other long term assets on the consolidated balance sheets.
Marketable Securities	Marketable Securities Marketable securities consist primarily of commercial paper and investment grade U.S. and non-U.S.-issued corporate debt securities. The Company invests in a diversified portfolio of marketable securities and limits the concentration of its investment in any particular security. Marketable securities with original maturities of three months or less are included in cash and cash equivalents and marketable securities with original maturities greater than three months, but less than one year, are included in short term investments on the consolidated balance sheets. The Company determines the classification of its marketable securities as available-for-sale or held-to-maturity at the time of purchase and reassesses these determinations at each balance sheet date. Debt securities are classified as held-to-maturity when the Company has the intent to hold the securities to maturity. Held-to-maturity securities are stated at amortized cost and are periodically assessed for other-than-temporary impairment. The amortized cost of debt securities is adjusted for the amortization of premiums and accretion of discounts to maturity, which is recognized as interest income within net interest (income) expense in the consolidated statements of operations. Interest income is recognized when earned.
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Accumulated other comprehensive loss consists of foreign currency translation adjustments. The financial statements of the Company’s foreign subsidiaries are translated from their functional currency into U.S. dollars. Assets and liabilities are translated at period end rates of exchange, and revenue and expenses are translated using average rates of exchange. The resulting gain or loss is included in accumulated other comprehensive loss on the consolidated balance sheets.
Property and Equipment, Net	Property and Equipment, Net Property and equipment is recorded at cost and depreciated using the straight-line method over the estimated useful lives of the related assets. The useful lives are as follows: Estimated Useful Life Computer equipment 2-3 years Furniture and fixtures 5 years Developed software 1-3 years Purchased software and digital assets 3-5 years Leasehold improvements Shorter of expected useful life or lease term Maintenance and repair costs are charged to expense as incurred. Major improvements, which extend the useful life of the related asset, are capitalized. Upon disposal of a fixed asset, the Company records a gain or loss based on the difference between the proceeds received and the net book value of the disposed asset.
Accounts Receivable, Net	Accounts Receivable, Net See Note 3, Revenue Accounts Receivable, Net Accounts receivable primarily represent the net cash due from the Company’s payment processors for cleared transactions and amounts owed from corporate and other institutional customers and Enterprise restaurants, which are generally invoiced on a monthly basis. The carrying amount of the Company’s receivables is reduced by an allowance for doubtful accounts that reflects management’s best estimate of amounts that will not be collected. These uncollected amounts are generally not recovered from the restaurants. The allowance is recorded through a charge to bad debt expense which is recognized within general and administrative expense in the consolidated statements of operations. The allowance is based on historical loss experience and any specific risks, current or forecasted, identified in collection matters. Management provides for probable uncollectible amounts through a charge against bad debt expense and a credit to an allowance based on its assessment of the current status of individual accounts. Balances still outstanding after management has used reasonable collection efforts are written off against the allowance. The Company does not charge interest on trade receivables. The Company incurs expenses for uncollected credit card receivables (or “chargebacks”), including fraudulent orders, when a diner’s card is authorized but fails to process, and for other unpaid credit card receivables. The majority of the Company’s chargeback expense is recorded directly to general and administrative expense in the consolidated statements of operations as the charges are incurred; however, a portion of the allowance for doubtful accounts includes a reserve for estimated chargebacks on the net cash due from the Company’s payment processors as of the end of the period. Changes in the Company’s allowance for doubtful accounts for the periods presented were as follows: Year Ended December 31, 2018 2017 Balance at beginning of period $ 1,513 $ 1,229 Additions (reductions) to expense (23 ) 335 Write-offs, net of recoveries and other adjustments (30 ) (51 ) Balance at end of period $ 1,460 $ 1,513
Advertising Costs	Advertising Costs Advertising costs are generally expensed as incurred in connection with the requisite service period. Certain advertising production costs are capitalized and expensed when the advertisement first takes place. For the years ended December 31, 2018, 2017 and 2016, expenses attributable to advertising totaled approximately $170.3 million, $107.2 million and $75.5 million, respectively. Advertising costs are recorded in sales and marketing expense on the Company’s consolidated statements of operations.
Stock-Based Compensation	Stock-Based Compensation The Company measures compensation expense for all stock-based awards, including stock options, restricted stock units and restricted stock awards, at fair value on the date of grant and recognizes compensation expense over the service period on a straight-line basis for awards expected to vest. The Company uses the Black-Scholes option-pricing model to determine the fair value for stock options. Management has determined the Black-Scholes fair value of stock option awards and related stock-based compensation expense with the assistance of third-party valuations. Determining the fair value of stock-based awards at the grant date requires judgment. The determination of the grant date fair value of options using an option-pricing model is affected by the Company’s estimated common stock fair value as well as assumptions regarding a number of other complex and subjective variables. If any of the assumptions used in the Black-Scholes model changes significantly, stock-based compensation for future awards may differ materially compared with the awards granted previously. The Black-Scholes option-pricing model requires the use of highly subjective and complex assumptions, including the expected term and the price volatility of the underlying stock, which determine the fair value of stock-based awards. These assumptions include: • Risk-free rate. Risk-free interest rates are derived from U.S. Treasury securities as of the option grant date. • Expected dividend yields. Expected dividend yields are based on our historical dividend payments, which have been zero to date (excluding the preferred stock tax distributions made by Seamless Holdings prior to 2015). • Volatility. Beginning in the first quarter of 2018, expected volatility is based on the historical and implied volatilities of the Company’s own common stock. Prior to 2018, the expected stock price volatility was based on a combination of the historical and implied volatilities of comparable publicly-traded companies and the historical volatility of our common stock due to our limited trading history as there was no active external or internal market for our common stock prior to the Company’s initial public offering in April 2014. • Expected term. Beginning in the first quarter of 2017, the expected term calculation for option awards considers a combination of the Company’s historical and estimated future exercise behavior. Prior to 2017, t he Company applied a simplified method which estimated the weighted-average expected life of the options as the average of the vesting option schedule and the term of the award due to insufficient historical exercise data as a result of the limited period of time stock-based awards had been exercisable. • Forfeiture rate. Forfeiture rates are estimated using historical actual forfeiture trends as well as our judgment of future forfeitures. These rates are evaluated at least annually and any change in compensation expense is recognized in the period of the change. The estimation of stock awards that will ultimately vest requires judgment and, to the extent actual results or updated estimates differ from our current estimates, such amounts will be recorded as a cumulative adjustment in the period in which the estimates are revised. The Company considers many factors when estimating expected forfeitures, including the types of awards and employee class. Actual results, and future changes in estimates, may differ substantially from management’s current estimates. See Note 10, Stock-Based Compensation, for the weighted-average assumptions used to estimate the fair value of options granted during the years ended December 31, 2018, 2017 and 2016. Prior to the adoption of Accounting Standards Update No. 2016-09, “Compensation—Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting” (“ASU 2016-09”) in 2017 , other tax attributes available to the Company had been utilized. Beginning in the first quarter of 2017, the Company recognizes tax benefits and deficiencies for stock-based awards in income tax (benefit) expense within the consolidated statements of operations. See Note 10, Stock-Based Compensation, for further discussion.
Income Tax (Benefit) Expense	Income Tax (Benefit) Expense Income tax (benefit) expense is determined using the asset and liability method. Under this method, deferred tax assets and liabilities are calculated based upon the temporary differences between the financial statement and income tax bases of assets and liabilities using the enacted tax rates that are applicable in a given year. The utilization of deferred tax assets is limited by the amount of taxable income expected to be generated within the allowable carryforward period and other factors. The Company records a valuation allowance to reduce deferred tax assets to the amount management believes is more likely than not to be realized. As of December 31, 2018 and 2017, a valuation allowance of $23.8 million and $4.8 million, respectively, was recorded on the Company’s consolidated balance sheets. See Note 11, Income Taxes The Company utilizes a two-step approach to recognizing and measuring uncertain tax positions (“tax contingencies”). The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes. The second step is to measure the tax benefit as the largest amount which is more than 50% likely to be realized upon ultimate settlement. The Company considers many factors when evaluating and estimating its tax positions and tax benefits, which may require periodic adjustments, and which may not accurately forecast actual outcomes. Management believes that it is more likely than not that forecasted income, including future reversals of existing taxable temporary differences, will be sufficient to fully recover the net deferred tax assets. In the event the Company determines that all or part of the net deferred tax assets are not realizable in the future, we will adjust the valuation allowance with the adjustment recognized as expense in the period in which such determination is made. The calculation of income tax liabilities involves significant judgment in estimating the impact of uncertainties and complex tax laws. In addition, the Company’s tax returns are subject to audit by various U.S. and foreign tax authorities. Resolution of these uncertainties in a manner inconsistent with our expectations could have a material impact on the Company’s financial position and results of operations. Due to the reduced cost of repatriating unremitted earnings as a result of U.S. tax legislation signed into law in December of 2017, the Tax Cuts and Jobs Act (the “Tax Act”) The Company includes interest and penalties related to tax contingencies in the provision for income taxes in the consolidated statements of operations. Management does not expect the total amount of unrecognized tax benefits to significantly change in the next twelve months.
Intangible Assets	Intangible Assets Intangible assets with finite useful lives are amortized using the straight-line method over their estimated useful lives and are reviewed for impairment. The Company evaluates intangible assets with finite and indefinite useful lives and other long-lived assets for impairment whenever events or circumstances indicate that they may not be recoverable, or at least annually. If management determines in its qualitative assessment that it is more likely than not that the assets may not be recoverable, the recoverability of finite and other long-lived assets is measured by comparing the carrying amount of an asset group to the future undiscounted net cash flows expected to be generated by that asset group. The Company groups assets for purposes of such review at the lowest level for which identifiable cash flows of the asset group are largely independent of the cash flows of the other groups of assets and liabilities. The amount of impairment to be recognized for finite and indefinite-lived intangible assets and other long-lived assets is calculated as the difference between the carrying value and the fair value of the asset group, generally measured by discounting estimated future cash flows. There were no impairment indicators present during the years ended December 31, 2018, 2017 or 2016.
Website and Software Development Costs	Website and Software Development Costs The costs incurred in the preliminary stages of website and software development are expensed as incurred. Once an application has reached the development stage, internal and external costs, if direct and incremental and deemed by management to be significant, are capitalized and amortized on a straight-line basis over the estimated useful life of the application. Maintenance and enhancement costs, including those costs in the post-implementation stages, are typically expensed as incurred, unless such costs relate to substantial upgrades and enhancements to the website or software that result in added functionality, in which case the costs are capitalized and amortized on a straight-line basis over the estimated useful lives. Amortization expense related to capitalized website and software development costs is included in depreciation and amortization in the consolidated statements of operations. The Company capitalized $41.1 million, $26.0 million and $15.6 million of website development costs during the years ended December 31, 2018, 2017 and 2016, respectively.
Goodwill	Goodwill Goodwill represents the excess of the cost of an acquired business over the fair value of the assets acquired at the date of acquisition. The Company’s methodology for allocating the purchase price of acquisitions is based on established valuation techniques that consider a number of factors, including valuations performed by third-party appraisers. As of December 31, 2018, the Company had $1,019.2 million in goodwill on its consolidated balance sheets. The Company assesses the impairment of goodwill at least annually and whenever events or changes in circumstances indicate that goodwill may be impaired. Absent any special circumstances that could require an interim test, the Company has elected to test for goodwill impairment at September 30 of each year. The Company has one reporting unit in testing goodwill for impairment. In testing goodwill for impairment, the Company may elect to utilize a qualitative assessment to evaluate whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount. If the qualitative assessment indicates that goodwill impairment is more likely than not, the Company performs a quantitative impairment test. T he Company would recognize an impairment charge for the amount by which the reporting unit’s carrying amount exceeds its fair value, if any, not to exceed the carrying amount of goodwill. Management determined the fair value of the Company as of September 30, 2018 by using a market-based approach that utilized our market capitalization, as adjusted for factors such as a control premium. After consideration of the Company’s market capitalization, business growth and other factors, management determined that it was more likely than not that the fair value of the Company exceeded its carrying amount at September 30, 2018 and that further analysis was not required. Additionally, as part of the interim review for indicators of impairment, management analyzed potential changes in value based on operating results for the three months ended December 31, 2018 compared to expected results. Management also considered how the Company’s market capitalization, business growth and other factors used in the September 30, 2018 impairment analysis, could be impacted by changes in market conditions and economic events. For example, the fair market value of the Company’s stock has decreased since September 30, 2018. Management considered these trends in performing its assessment of whether an interim impairment review was required. Based on this interim assessment, management concluded that as of December 31, 2018, there were no events or changes in circumstances that indicated it was more likely than not that the Company’s fair value was below its carrying value. The Company determined there was no goodwill impairment during the years ended December 31, 2018, 2017 and 2016. Nevertheless, significant changes in global economic and market conditions could result in changes to expectations of future financial results and key valuation assumptions. Such changes could result in revisions of management’s estimates of the Company’s fair value and could result in a material impairment of goodwill.
Debt Issuance Costs	D ebt Issuance Costs The Company allocates deferred debt issuance costs incurred for its current credit facility between the revolver and term loan based on their relative borrowing capacity. Deferred debt issuance costs associated with the revolving credit facility are recorded within other assets and those associated with the term loan are recorded as a reduction of the carrying value of the debt on the consolidated balance sheets. Debt
Fair Value	Fair Value Accounting standards define fair value as the price that would be received to sell an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market in an orderly transaction between market participants on the measurement date. The standards also establish a fair value hierarchy, which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. See Note 15, Fair Value Measurement
Concentration of Credit Risk	Concentration of Credit Risk Financial instruments which potentially subject the Company to concentrations of credit risk consist principally of accounts receivable. For the years ended December 31, 2018, 2017 and 2016, the Company had no customers which accounted for more than 10% of revenue or accounts receivable.
Revenue Recognition	Revenue Recognition See Note 3, Revenue,
Deferred Rent	Deferred Rent For the Company’s operating leases, the Company recognizes rent expenses on a straight-line basis over the terms of the leases. Accordingly, the Company records the difference between cash rent payments and the recognition of rent expenses as a deferred rent liability within other accruals in the consolidated balance sheets. The Company also has landlord-funded leasehold improvements that are recorded as tenant allowances, which are being amortized as a reduction of rent expense over the noncancelable terms of the operating leases. Deferred rent and tenant allowances recorded as of December 31, 2018 will be impacted by changes in accounting pronouncements that became effective in the first quarter of 2019. See Recently Issued Accounting Pronouncements
Segments	Segments The Company has one reportable segment, which has been identified based on how the chief operating decision maker manages the business, makes operating decisions and evaluates operating performance.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements Company’s consolidated financial position, results of operations or cash flows. the FASB In August 2016, the FASB issued Accounting Standards Update No. 2016-15, “Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments” (“ASU 2016-15”). ASU 2016-15 adds or clarifies guidance on the classification of certain cash receipts and payments in the statement of cash flows with the intent of reducing diversity in practice related to eight types of cash flows including, among others, debt prepayment or debt extinguishment costs, contingent consideration payments made after a business combination, and separately identifiable cash flows and application of the predominance principle. In addition, in November 2016, the FASB issued Accounting Standards Update No. 2016-18, “Statement of Cash Flows (Topic 230): Restricted Cash” (“ASU 2016-18”). ASU 2016-18 requires companies to include amounts generally described as restricted cash and restricted cash equivalents in cash and cash equivalents when reconciling beginning-of-period and end-of-period total amounts shown on the statement of cash flow . ASU 2016-15 and ASU 2016-18 were effective for and adopted by the Company beginning in the first quarter of 2018. The amendments were applied using a retrospective transition method to each period presented and impacted the Company’s presentation of the consolidated statements of cash flows. The adoption of ASU 2016-15 and ASU 2016-18 had no material impact on the Company’s consolidated financial position, results of operations or cash flows as the Company’s restricted cash balances are immaterial. In June 2016, the FASB issued Accounting Standards Update No. 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments” (“ASU 2016-13”). ASU 2016-13 introduces a new forward-looking approach, based on expected losses, to estimate credit losses on certain types of financial instruments, including trade receivables and held-to-maturity debt securities, which will require entities to incorporate considerations of historical information, current information and reasonable and supportable forecasts. This ASU also expands disclosure requirements. ASU 2016-13 is effective for the Company beginning in the first quarter of 2020 and early adoption is permitted. The guidance will be applied using the modified-retrospective approach. The adoption of ASU 2016-13 is not expected to have a material impact on the Company’s consolidated financial position, results of operations or cash flows. In February 2016, the FASB issued Accounting Standards Update No. the FASB issued Accounting Standards Update No. 2018-11 “Leases (Topic 842): Targeted Improvements” (“ASU 2018-11”), which provides for the election of transition methods between the modified retrospective method and the optional transition relief method. The modified retrospective method is applied to all prior reporting periods presented with a cumulative-effect adjustment recorded in the earliest comparative period while the optional transition relief method is applied beginning in the period of adoption with a cumulative-effect adjustment recorded in the first quarter of 2019. The Company will apply the optional transition relief method and has elected the optional practical expedient package, which includes retaining the current classification of leases. The adoption of ASC Topic 842 has a significant impact on the Company’s consolidated financial position, but management anticipates that it will have no material impact to its results of operations or cash flows. In May 2014, and in subsequent updates, the FASB issued ASC Topic 606 , Revenue from Contracts with Customers, Revenue Recognition industry-specific requirements. ASC Topic 606 establishes a five-step revenue recognition process in which an entity will recognize revenue when it transfers promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. ASC Topic 606 also requires enhanced disclosures regarding the nature, amount, timing and uncertainty of revenues and cash flows from contracts with customers. ASC Topic 606 was effective for and adopted by the Company in the first quarter of 2018. . The adoption of ASC Topic 606 did not have and is not expected to have a material impact on the The adoption of ASC Topic 606 resulted in an increase in revenues of $1.2 million for the year December 31, 2018 • Beginning in January 1, 2018, the Company defers the incremental costs of obtaining contracts as contract acquisition assets resulting in a net decrease of $9.0 million in sales and marketing expense in the consolidated statements of operations for the year December 31, 2018 • Beginning in the first quarter of 2018, the Company recognizes revenue from estimated unredeemed gift cards that are not subject to unclaimed property laws over the expected customer redemption period, rather than when the likelihood of redemption became remote. The Company recorded a cumulative-effect adjustment to opening retained earnings as of January 1, 2018 of $0.9 million related to unredeemed gift cards, breakage income of $1.1 million in revenues in the consolidated statements of operations during the year December 31, 2018 and a corresponding decrease in other accruals of $2.0 million on the consolidated balance sheets. • Changes in the timing of revenue recognition under ASC Topic 606 related to incentives, refunds and adjustments resulted in a $0.1 million increase in revenues in the consolidated statements of operations during the year ended December 31, 2018. • The adoption of ASC Topic 606 had no impact to the Company’s total net cash provided by or used in operations, investing or financing activities within the Company’s consolidated statement of cash flows for the year ended See Note 3, Revenue
Deferred Revenues	Deferred Revenues The Company’s deferred revenues consist primarily of gift card liabilities, certain incentive liabilities as well as customer billings for professional services recognized ratably over the subscription period. These amounts are included within other accruals on the consolidated balance sheets and are not material to the Company’s consolidated financial position. The majority of gift cards and incentives issued by the Company are redeemed within a year.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2018
Accounting Policies [Abstract]
Schedule of Property and Equipment Estimated Useful Life	Property and equipment is recorded at cost and depreciated using the straight-line method over the estimated useful lives of the related assets. The useful lives are as follows: Estimated Useful Life Computer equipment 2-3 years Furniture and fixtures 5 years Developed software 1-3 years Purchased software and digital assets 3-5 years Leasehold improvements Shorter of expected useful life or lease term

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2018
Revenue From Contract With Customer [Abstract]
Summary of Changes in Allowance For Doubtful Accounts	Changes in the Company’s allowance for doubtful accounts for the periods presented were as follows: Year Ended December 31, 2018 2017 Balance at beginning of period $ 1,513 $ 1,229 Additions (reductions) to expense (23 ) 335 Write-offs, net of recoveries and other adjustments (30 ) (51 ) Balance at end of period $ 1,460 $ 1,513

Acquisitions (Tables)

Acquisitions (Tables)	12 Months Ended
	Dec. 31, 2018
Tapingo and LevelUp
Business Acquisition [Line Items]
Schedule of Acquisition Date Fair Value of Assets and Liabilities	The following table summarizes the preliminary purchase price allocation acquisition-date fair values of the asset and liabilities acquired in connection with the Tapingo and LevelUp acquisitions: Tapingo LevelUp Total (in thousands) Accounts receivable $ 3,101 $ 6,201 $ 9,302 Prepaid expenses and other current assets 843 1,396 2,239 Property and equipment — 895 895 Other assets 163 — 163 Restaurant relationships 11,279 10,217 21,496 Diner acquisition — 3,912 3,912 Below-market lease intangible — 2,205 2,205 Developed technology 9,755 20,107 29,862 Goodwill 133,383 295,994 429,377 Net deferred tax asset (1,988 ) 31,621 29,633 Accounts payable and accrued expenses (4,478 ) (3,121 ) (7,599 ) Total purchase price net of cash acquired $ 152,058 $ 369,427 $ 521,485 Net working capital adjustment receivable 127 — 127 Fair value of assumed ISOs attributable to pre-combination service (372 ) (2,594 ) (2,966 ) Net cash paid $ 151,813 $ 366,833 $ 518,646
Eat24 and Foodler
Business Acquisition [Line Items]
Schedule of Acquisition Date Fair Value of Assets and Liabilities	The following table summarizes the final purchase price allocation acquisition-date fair values of the assets and liabilities acquired in connection with the Eat24 and Foodler acquisitions: Eat24 Foodler Total (in thousands) Accounts receivable $ 8,267 $ 307 $ 8,574 Prepaid expenses and other current assets 221 — 221 Property and equipment 1,113 — 1,113 Restaurant relationships 126,232 35,217 161,449 Diner acquisition 35,226 1,354 36,580 Trademarks 2,225 74 2,299 Developed technology 2,559 1,955 4,514 Goodwill 135,955 17,452 153,407 Accounts payable and accrued expenses (30,082 ) (5,237 ) (35,319 ) Total purchase price net of cash acquired $ 281,716 $ 51,122 $ 332,838 Fair value of replacement RSUs attributable to pre-combination service (274 ) — (274 ) Net cash paid $ 281,442 $ 51,122 $ 332,564
LABite
Business Acquisition [Line Items]
Schedule of Acquisition Date Fair Value of Assets and Liabilities	The following table summarizes the final purchase price allocation acquisition-date fair values of the assets and liabilities acquired in connection with the LABite acquisition: (in thousands) Accounts receivable $ 2,320 Prepaid expenses and other assets 68 Restaurant relationships 46,513 Property and equipment 257 Developed technology 1,731 Goodwill 40,235 Trademarks 440 Accounts payable and accrued expenses (6,303) Net deferred tax liability (19,412) Total purchase price net of cash acquired $ 65,849
Tapingo, LevelUp, Eat24, and Foodler
Business Acquisition [Line Items]
Valuation Methods for Intangible Assets Acquired	The estimated fair values of the intangible assets acquired were determined based on a combination of the income, cost, and market approaches to measure the fair value of the restaurant relationships, diner acquisition, developed technology and trademarks as follows: Valuation Method Tapingo LevelUp Eat24 Foodler Restaurant relationships Multi-period excess earnings With or without comparative business valuation Multi-period excess earnings Multi-period excess earnings Diner acquisition n/a Cost to recreate Cost to recreate Cost to recreate Developed technology Cost to recreate Multi-period excess earnings Cost to recreate Cost to recreate Trademark n/a n/a Relief from royalty Relief from royalty
Pro Forma Summary of Operation	The following unaudited pro forma information presents a summary of the operating results of the Company for the years ended December 31, 2018 2017 Year Ended December 31, 2018 2017 (in thousands, except per share data) (unaudited) Revenues $ 1,041,811 $ 782,895 Net income 55,975 41,008 Net income per share attributable to common shareholders: Basic $ 0.63 $ 0.48 Diluted $ 0.61 $ 0.46
Pro Forma Adjustments	The pro forma adjustments that reflect the amortization that would have been recognized for intangible assets, elimination of transaction costs incurred, stock-based compensation expense for replacement awards, interest expense for transaction financings and other adjustments, as well as the pro forma tax impact of such adjustments for the years ended December 31, 2018 2017 Year Ended December 31, 2018 2017 (in thousands) (unaudited) Depreciation and amortization $ 4,893 $ 16,588 Transaction costs (6,923 ) 1,293 Stock-based compensation 3,748 7,200 Interest expense 1,601 5,358 Other — 4,690 Income tax benefit (1,548 ) (15,098 )

Marketable Securities (Tables)

Marketable Securities (Tables)	12 Months Ended
	Dec. 31, 2018
Investments Debt And Equity Securities [Abstract]
Summary of Held-to-Maturity Marketable Securities	The amortized cost, unrealized gains and losses and estimated fair value of the Company’s held-to-maturity marketable securities as of December 31, 2018 and 2017 were as follows: December 31, 2018 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (in thousands) Cash and cash equivalents Commercial paper $ 12,097 $ — $ (21 ) $ 12,076 Corporate bonds 870 — — 870 Short-term investments Commercial paper 13,334 — (88 ) 13,246 Corporate bonds 750 — — 750 Total $ 27,051 $ — $ (109 ) $ 26,942 December 31, 2017 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (in thousands) Cash and cash equivalents Commercial paper $ 39,979 $ — $ (43 ) $ 39,936 Corporate bonds 1,250 — — 1,250 Short-term investments Commercial paper 21,480 — (99 ) 21,381 Corporate bonds 2,125 — (1 ) 2,124 Total $ 64,834 $ — $ (143 ) $ 64,691
Summary of Continuous Unrealized Loss on Marketable Securities	The gross unrealized losses, estimated fair value and length of time the individual marketable securities were in a continuous loss position for those marketable securities in an unrealized loss position as of December 31, 2018 and 2017 were as follows: December 31, 2018 Less Than 12 Months 12 Months or Greater Total Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Estimated Fair Value Unrealized Loss (in thousands) Commercial paper $ 25,322 $ (109 ) $ — $ — $ 25,322 $ (109 ) Corporate bonds 750 — — — 750 — Total $ 26,072 $ (109 ) $ — $ — $ 26,072 $ (109 ) December 31, 2017 Less Than 12 Months 12 Months or Greater Total Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Estimated Fair Value Unrealized Loss (in thousands) Commercial paper $ 61,317 $ (142 ) $ — $ — $ 61,317 $ (142 ) Corporate bonds 3,374 (1 ) — — 3,374 (1 ) Total $ 64,691 $ (143 ) $ — $ — $ 64,691 $ (143 )

Goodwill and Acquired Intangi_2

Goodwill and Acquired Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Components of Acquired Intangible Assets (Finite Lived)	The components of acquired intangible assets as of December 31, 2018 and 2017 were as follows: December 31, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Value Gross Amount Accumulated Amortization Net Value (in thousands) Restaurant relationships $ 494,278 $ (103,457 ) $ 390,821 $ 457,580 $ (76,852 ) $ 380,728 Diner acquisition 47,541 (10,306 ) 37,235 40,247 (1,906 ) 38,341 Developed technology 38,385 (10,247 ) 28,138 8,523 (6,418 ) 2,105 Trademarks 2,225 (2,225 ) — 2,225 (402 ) 1,823 Below-market lease intangible 2,206 (124 ) 2,082 — — — Other 3,676 (2,615 ) 1,061 6,888 (4,008 ) 2,880 Total amortizable intangible assets 588,311 (128,974 ) 459,337 515,463 (89,586 ) 425,877 Indefinite-lived trademarks 89,676 — 89,676 89,676 — 89,676 Total acquired intangible assets $ 677,987 $ (128,974 ) $ 549,013 $ 605,139 $ (89,586 ) $ 515,553
Components of Acquired Intangible Assets (Infinite Lived)	The components of acquired intangible assets as of December 31, 2018 and 2017 were as follows: December 31, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Value Gross Amount Accumulated Amortization Net Value (in thousands) Restaurant relationships $ 494,278 $ (103,457 ) $ 390,821 $ 457,580 $ (76,852 ) $ 380,728 Diner acquisition 47,541 (10,306 ) 37,235 40,247 (1,906 ) 38,341 Developed technology 38,385 (10,247 ) 28,138 8,523 (6,418 ) 2,105 Trademarks 2,225 (2,225 ) — 2,225 (402 ) 1,823 Below-market lease intangible 2,206 (124 ) 2,082 — — — Other 3,676 (2,615 ) 1,061 6,888 (4,008 ) 2,880 Total amortizable intangible assets 588,311 (128,974 ) 459,337 515,463 (89,586 ) 425,877 Indefinite-lived trademarks 89,676 — 89,676 89,676 — 89,676 Total acquired intangible assets $ 677,987 $ (128,974 ) $ 549,013 $ 605,139 $ (89,586 ) $ 515,553
Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill during the years ended December 31, 2018 and 2017 were as follows. Goodwill Accumulated Impairment Losses Net Book Value (in thousands) Balance as of December 31, 2016 $ 436,455 $ — $ 436,455 Acquisitions 153,407 — 153,407 Balance as of December 31, 2017 $ 589,862 $ — $ 589,862 Acquisitions 429,377 — 429,377 Balance as of December 31, 2018 $ 1,019,239 $ — $ 1,019,239
Components of Acquired Intangibles Assets Added During the Year (Finite Lived)	Year Ended December 31, 2018 Year Ended December 31, 2017 Amount Weighted-Average Amortization Period Amount Weighted-Average Amortization Period (in thousands) (years) (in thousands) (years) Restaurant relationships $ 36,697 17.5 $ 177,929 19.3 Developed technology 29,862 4.7 4,514 0.5 Diner acquisition 7,294 5.0 40,247 5.0 Below-market lease intangible 2,205 5.8 — Trademarks — 2,299 1.2 Other — 5,000 2.8 Total $ 76,058 $ 229,989
Estimated Future Amortization of Acquired Intangible Assets	Estimated future amortization expense of acquired intangible assets as of December 31, 2018 was as follows: (in thousands) 2019 $ 47,445 2020 44,770 2021 39,120 2022 37,150 2023 30,644 Thereafter 260,208 Total $ 459,337

Property and Equipment (Tables)

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2018
Property Plant And Equipment [Abstract]
Components of Property and Equipment	The components of the Company’s property and equipment as of December 31, 2018 and 2017 were as follows: December 31, 2018 December 31, 2017 (in thousands) Developed software $ 90,302 $ 52,041 Computer equipment 50,767 31,601 Leasehold improvements 39,550 23,400 Furniture and fixtures 10,801 6,857 Purchased software and digital assets 4,696 2,881 Construction in progress 1,976 — Property and equipment 198,092 116,780 Accumulated depreciation and amortization (78,597 ) (45,396 ) Property and equipment, net $ 119,495 $ 71,384

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2018
Commitments And Contingencies Disclosure [Abstract]
Summary of Future Minimum Lease Payments	Future minimum lease payments under the Company’s operating lease agreements that have initial or remaining non-cancelable lease terms in excess of one year as of December 31, 2018 were as follows: (in thousands) 2019 $ 13,009 2020 14,874 2021 14,243 2022 12,219 2023 12,220 Thereafter 57,503 Total $ 124,068

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2018
Debt Disclosure [Abstract]
Schedule of Debt	The following table summarizes the carrying value of the Company’s debt as of December 31, 2018: December 31, 2018 December 31, 2017 (in thousands) Term loan $ 120,312 $ 124,219 Revolving loan 222,000 50,000 Total debt $ 342,312 $ 174,219 Less current portion (6,250 ) (3,906 ) Less unamortized deferred debt issuance costs (514 ) (668 ) Long-term debt $ 335,548 $ 169,645
Schedule of Future Maturities of Principal Payments	Future maturities of principal payments, excluding potential early payments, as of December 31, 2018 under the Previous Credit Agreement were as follows: (in thousands) 2019 $ 6,250 2020 6,250 2021 7,031 2022 322,781 Total $ 342,312

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Assumptions Used to Determine Fair Value of Stock Options Granted	The assumptions used to determine the fair value of the stock options granted during the years ended December 31, 2018, 2017 and 2016 were as follows: Year Ended December 31, 2018 2017 2016 Weighted-average fair value options granted $ 66.19 $ 15.19 $ 12.59 Average risk-free interest rate 2.61 % 1.65 % 1.41 % Expected stock price volatility (a) 46.4 % 48.7 % 49.7 % Dividend yield None None None Expected stock option life (years) (b) 3.51 4.00 5.84 (a) Prior to the first quarter of 2018, the expected stock price volatility was based on a combination of the historical and implied volatilities of comparable publicly-traded companies and the historical volatility of the Company’s own common stock due to its limited trading history as there was no active external or internal market for the Company’s common stock prior to the Company’s initial public offering in April 2014. (b) The expected term for Tapingo and LevelUp assumed ISO awards was calculated based on their respective remaining vesting periods as of the acquisition date. During the year ended December 31, 2016, the expected term of option awards was estimated using a simplified method due to the limited period of time stock-based awards had been exercisable. ____________________________________________________________________________________________________________________
Summary of Stock Option Activity	Stock option awards as of December 31, 2018 and 2017, and changes during the year ended December 31, 2018, were as follows: Options Weighted-Average Exercise Price Aggregate Intrinsic Value (thousands) Weighted-Average Exercise Term (years) Outstanding at December 31, 2017 2,705,849 $ 25.53 $ 125,197 7.28 Granted 675,643 62.89 Forfeited (206,986 ) 46.27 Exercised (523,667 ) 27.10 Outstanding at December 31, 2018 2,650,839 33.13 120,977 6.87 Vested and expected to vest at December 31, 2018 2,649,081 33.11 120,926 6.87 Exercisable at December 31, 2018 1,599,731 $ 22.91 $ 86,880 6.03
Non-vested Restricted Stock Units	Non-vested restricted stock units as of December 31, 2018 and 2017, and changes during the year ended December 31, 2018 were as follows: Restricted Stock Units Shares Weighted-Average Grant Date Fair Value Outstanding at December 31, 2017 2,454,801 $ 37.56 Granted 1,325,499 94.41 Forfeited (462,684 ) 52.72 Vested (988,759 ) 36.55 Outstanding at December 31, 2018 2,328,857 $ 67.33

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income Tax Provision	For the years ended December 31, 2018, 2017 and 2016, the income tax provision was comprised of the following: Year Ended December 31, 2018 2017 2016 (in thousands) Current: Federal $ (2,934 ) $ 16,852 $ 24,509 State 3,827 4,721 8,132 Foreign 335 271 338 Total current 1,228 21,844 32,979 Deferred: Federal 2,608 (30,794 ) 800 State (884 ) (385 ) 516 Total deferred 1,724 (31,179 ) 1,316 Total income tax (benefit) expense $ 2,952 $ (9,335 ) $ 34,295
Income Before Provision for Income Taxes	Income before provision for income taxes for the years ended December 31, 2018, 2017 and 2016, was as follows: Year Ended December 31, 2018 2017 2016 (in thousands) Domestic source $ 80,878 $ 88,357 $ 82,033 Foreign source 555 1,291 1,819 Income before provision for income taxes $ 81,433 $ 89,648 $ 83,852
Reconciliation of Income Taxes Computed at U.S. Federal Statutory Rate to Income Taxes	The following is a reconciliation of income taxes computed at the U.S. federal statutory rate to the income taxes reported in the consolidated statements of operations for the years ended December 31, 2018, 2017 and 2016: Year Ended December 31, 2018 2017 2016 (in thousands) Income tax expense at statutory rate $ 17,101 $ 31,377 $ 29,348 State income taxes 1,248 5,011 5,621 Effect of federal rate change — (36,768 ) — Stock-based compensation (15,924 ) (7,072 ) — Excess compensation 1,753 — — Research and development tax credit (1,470 ) (800 ) (638 ) Uncertain tax position (545 ) (55 ) — Foreign rate differential (57 ) (203 ) (273 ) Unremitted earnings tax — 363 — All other 846 (1,188 ) 237 Total income tax (benefit) expense $ 2,952 $ (9,335 ) $ 34,295
Deferred Income Tax Assets and Liabilities	The tax effects of temporary differences giving rise to deferred income tax assets and liabilities as of December 31, 2018 and 2017 were as follows: As of December 31, 2018 2017 (in thousands) Deferred tax assets: Loss and credit carryforwards $ 72,466 $ 11,184 Accrued expenses 4,128 2,089 Stock-based compensation 8,832 9,914 Fixed assets - state 2,295 — Total deferred tax assets 87,721 23,187 Valuation allowance (23,840 ) (4,803 ) Net deferred tax assets 63,881 18,384 Deferred tax liabilities: Fixed assets (8,607 ) (5,909 ) Intangible assets (101,451 ) (86,462 ) Prepaid expenses (206 ) (305 ) Total deferred tax liabilities (110,264 ) (92,676 ) Net deferred tax liability $ (46,383 ) $ (74,292 )
Credit Carryforwards	The Company had the following tax loss and credit carryforwards as of December 31, 2018 and 2017: 2018 2017 Beginning Year of Expiration (in thousands) U.S. federal loss carryforwards $ 29,853 $ 595 2027 U.S. state and local loss carryforwards 18,147 4,362 2027 Israeli loss carryforward 15,382 — Indefinite Illinois Edge Credits (a) 11,992 8,422 2018 Federal research and development credit 1,986 — 2028 State research and development credit 1,710 — 2018 (a) Amounts are before the federal benefit of state tax. __________________________________________________________________________________________________
Unrecognized Tax Benefit Activity Excluding Related Accrual for Interest	The following table summarizes the Company’s unrecognized tax benefit activity during the years ended December 31, 2018 and 2017, excluding the related accrual for interest: As of December 31, 2018 2017 (in thousands) Balance at beginning of period $ 2,864 $ 3,345 Reductions for tax positions taken in prior years (2,260 ) (937 ) Additions for tax positions taken in the current year 147 456 Balance at end of period $ 751 $ 2,864

Earnings Per Share Attributab_2

Earnings Per Share Attributable to Common Stockholders (Tables)	12 Months Ended
	Dec. 31, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Income Per Share	The following table presents the calculation of basic and diluted net income per share attributable to common stockholders for the years ended December 31, 2018, 2017 and 2016: Year Ended December 31, 2018 2017 2016 (in thousands, except per share data) Basic earnings per share: Net income attributable to common stockholders (numerator) $ 78,481 $ 98,983 $ 49,557 Shares used in computation (denominator) Weighted-average common shares outstanding 89,447 86,297 85,069 Basic earnings per share $ 0.88 $ 1.15 $ 0.58 Diluted earnings per share: Net income attributable to common stockholders (numerator) $ 78,481 $ 98,983 $ 49,557 Shares used in computation (denominator) Weighted-average common shares outstanding 89,447 86,297 85,069 Effect of dilutive securities: Stock options 1,601 1,059 792 Restricted stock units and restricted stock awards 1,306 826 274 Weighted-average diluted shares 92,354 88,182 86,135 (a) Diluted earnings per share $ 0.85 $ 1.12 $ 0.58 (a) Prior to the adoption of ASU 2016-09, the treasury stock method calculation of weighted-average dilutive shares outstanding for the year ended December 31, 2016 included the estimated impact of tax benefits and deficiencies.
Anti-dilutive Securities Excluded from Calculation of Diluted Net Income Per Share	The number of shares of common stock underlying stock-based awards excluded from the calculation of diluted net income per share attributable to common stockholders because their effect would have been antidilutive for the years ended December 31, were as follows: Year Ended December 31, 2018 2017 2016 Anti-dilutive shares underlying stock-based awards: Stock options 216,451 — 552,108 Restricted stock units 222,984 35,646 212,170

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	12 Months Ended
	Dec. 31, 2018
Fair Value Disclosures [Abstract]
Schedule of Fair Value and Carrying Value of Assets and Liabilities Recorded at Other Than Fair Value	The following table presents the fair value, for disclosure purposes only, and carrying value of the Company’s assets and liabilities that are recorded at other than fair value as of December 31, 2018 and 2017: December 31, 2018 December 31, 2017 Level 2 Level 3 Carrying Value Level 2 Level 3 Carrying Value (in thousands) Assets Money market funds $ 61 $ — $ 61 $ 93 $ — $ 93 Commercial paper 25,322 — 25,431 61,317 — 61,459 Corporate bonds 1,620 — 1,620 3,374 — 3,375 Total assets $ 27,003 $ — $ 27,112 $ 64,784 $ — $ 64,927 Liabilities Long-term debt, including current maturities $ — $ 342,745 $ 342,312 $ — $ 175,700 $ 174,219 Total liabilities $ — $ 342,745 $ 342,312 $ — $ 175,700 $ 174,219

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2018USD ($)CustomerSegment	Dec. 31, 2017USD ($)Customer	Dec. 31, 2016USD ($)Customer	Jan. 01, 2019USD ($)	Jan. 01, 2018USD ($)
Significant Accounting Policies [Line Items]
Restricted cash balances	$ 4,600,000	$ 4,100,000
Restricted Cash, Asset, Statement of Financial Position [Extensible List]	grub:PrepaidExpenseAndOtherAssetsCurrentAndNoncurrent	grub:PrepaidExpenseAndOtherAssetsCurrentAndNoncurrent
Advertising costs	$ 170,300,000	$ 107,200,000	$ 75,500,000
Expected dividend yield	0.00%	0.00%	0.00%
Valuation allowance related to deferred tax assets	$ 23,840,000	$ 4,803,000
Additional tax liability, unremitted foreign earnings	0	0
Goodwill	1,019,239,000	589,862,000	$ 436,455,000
Goodwill Impairment	$ 0	0	0
Number of reportable segment | Segment	1
Revenues	$ 1,007,257,000	683,067,000	493,331,000
Effect on sales and marketing	214,290,000	150,730,000	$ 110,323,000
Effect on other assets	14,186,000	6,487,000
Retained earnings	349,355,000	269,992,000
Other accruals	44,323,000	$ 26,818,000
ASC Topic 606 | Adjustments
Significant Accounting Policies [Line Items]
Revenues	1,200,000
ASC Topic 606 | Adjustments | Adjustment Unredeemed Gift Card Breakage Income
Significant Accounting Policies [Line Items]
Revenues	1,100,000
Retained earnings					$ 900,000
Other accruals	(2,000,000)
ASC Topic 606 | Adjustments | Incentives Refunds And Adjustments
Significant Accounting Policies [Line Items]
Revenues	100,000
ASC Topic 606 | Adjustments | Capitalized Contract Cost
Significant Accounting Policies [Line Items]
Effect on sales and marketing	(9,000,000)
Effect on other assets	$ 9,000,000
Contract acquisition assets, estimated service period	4 years
Subsequent Event | Accounting Standards Update 2016-02 | Minimum
Significant Accounting Policies [Line Items]
Operating leases, right of use assets				$ 80,000,000
Operating leases, liabilities				80,000,000
Subsequent Event | Accounting Standards Update 2016-02 | Maximum
Significant Accounting Policies [Line Items]
Operating leases, right of use assets				95,000,000
Operating leases, liabilities				$ 95,000,000
Customer Concentration Risk | Revenue
Significant Accounting Policies [Line Items]
Number of customers accounted | Customer	0	0	0
Concentration risk percentage	10.00%	10.00%	10.00%
Customer Concentration Risk | Accounts receivable
Significant Accounting Policies [Line Items]
Number of customers accounted | Customer	0	0	0
Concentration risk percentage	10.00%	10.00%	10.00%
Developed software
Significant Accounting Policies [Line Items]
Capitalized cost	$ 41,100,000	$ 26,000,000	$ 15,600,000
Measurement Input Expected Dividend Rate
Significant Accounting Policies [Line Items]
Expected dividend yield	0.00%

Estimated Useful life of Proper

Estimated Useful life of Property and Equipment (Detail)	12 Months Ended
	Dec. 31, 2018
Computer equipment | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Life	2 years
Computer equipment | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Life	3 years
Furniture and fixtures
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Life	5 years
Developed software | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Life	1 year
Developed software | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Life	3 years
Purchased Software and Digital Assets | Minimum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Life	3 years
Purchased Software and Digital Assets | Maximum
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Life	5 years
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment, Estimated Useful Life	Shorter of expected useful life or lease term

Summary of Changes in Allowance

Summary of Changes in Allowance For Doubtful Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Balance at beginning of period	$ 1,513	$ 1,229
Additions (reductions) to expense	(23)	335
Write-offs, net of recoveries and other adjustments	(30)	(51)
Balance at end of period	$ 1,460	$ 1,513

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Capitalized Contract Cost [Line Items]
Contract acquisition assets, estimated service period	4 years
Capitalized contract acquisition costs	$ 10,300,000
Contract acquisition assets amortization	$ 1,300,000
Prior to Adoption of ASC Topic 606
Capitalized Contract Cost [Line Items]
Capitalized contract acquisition costs		$ 0
Contract acquisition assets amortization		$ 0

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	Nov. 07, 2018	Sep. 13, 2018	Oct. 10, 2017	Aug. 23, 2017	May 05, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Net cash payments to acquire businesses						$ 517,909	$ 333,301	$ 65,849
Fair value of replacement awards granted to acquired business employees						2,966	274
Net working capital adjustment receivable						127	737
Goodwill						1,019,239	589,862	436,455
General and administrative expenses
Business Acquisition [Line Items]
Direct and indirect expense incurred related to acquisitions						$ 6,900	$ 5,600	$ 2,000
Tapingo
Business Acquisition [Line Items]
Acquisition date	Nov. 7, 2018
Total purchase price net of cash acquired	$ 152,058
Net cash payments to acquire businesses	151,813
Cash acquired in business acquisition	1,500
Net working capital adjustment receivable	127
Goodwill	133,383
Tapingo | ISO
Business Acquisition [Line Items]
Fair value of replacement awards granted to acquired business employees	372
LevelUp
Business Acquisition [Line Items]
Acquisition date		Sep. 13, 2018
Total purchase price net of cash acquired		$ 369,427
Net cash payments to acquire businesses		366,833
Cash acquired in business acquisition		6,000
Goodwill		295,994
LevelUp | ISO
Business Acquisition [Line Items]
Fair value of replacement awards granted to acquired business employees		$ 2,594
Tapingo and LevelUp
Business Acquisition [Line Items]
Total purchase price net of cash acquired	521,485
Net cash payments to acquire businesses	518,646
Net working capital adjustment receivable	127
Goodwill	429,377
Tapingo and LevelUp | ISO
Business Acquisition [Line Items]
Fair value of replacement awards granted to acquired business employees	2,966
Post combination expense expected to be recognized related to replacement awards	$ 21,400
Eat24
Business Acquisition [Line Items]
Acquisition date			Oct. 10, 2017
Total purchase price net of cash acquired			$ 281,716
Net cash payments to acquire businesses			281,442
Goodwill			135,955
Escrow related to indemnification rights under purchase agreement			$ 28,800
Period of escrow			18 months
Eat24 | Restricted Stock Units
Business Acquisition [Line Items]
Fair value of replacement awards granted to acquired business employees			$ 274
Post combination expense expected to be recognized related to replacement awards			4,100
Foodler
Business Acquisition [Line Items]
Acquisition date				Aug. 23, 2017
Total purchase price net of cash acquired				$ 51,122
Net cash payments to acquire businesses				51,122
Cash acquired in business acquisition				100
Goodwill				$ 17,452
Eat24 and Foodler
Business Acquisition [Line Items]
Total purchase price net of cash acquired			332,838
Net cash payments to acquire businesses			332,564
Goodwill			153,407
Goodwill expected to be deductible for income tax purposes			153,407
Eat24 and Foodler | Restricted Stock Units
Business Acquisition [Line Items]
Fair value of replacement awards granted to acquired business employees			$ 274
LABite
Business Acquisition [Line Items]
Acquisition date					May 5, 2016
Total purchase price net of cash acquired					$ 65,849
Cash acquired in business acquisition					2,600
Goodwill					40,235
Goodwill expected to be deductible for income tax purposes					$ 5,000

Schedule of Acquisition-Date Fa

Schedule of Acquisition-Date Fair Value of Assets and Liabilities (Detail) - USD ($) $ in Thousands	Nov. 07, 2018	Sep. 13, 2018	Oct. 10, 2017	Aug. 23, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	May 05, 2016
Business Acquisition [Line Items]
Goodwill					$ 1,019,239	$ 589,862	$ 436,455
Net working capital adjustment receivable					127	737
Fair value of assumed equity awards attributable to pre-combination service					(2,966)	(274)
Net cash paid					$ 517,909	$ 333,301	$ 65,849
Tapingo
Business Acquisition [Line Items]
Accounts receivable	$ 3,101
Prepaid expenses and other current assets	843
Other assets	163
Goodwill	133,383
Net deferred tax liability	(1,988)
Accounts payable and accrued expenses	(4,478)
Total purchase price net of cash acquired	152,058
Net working capital adjustment receivable	127
Net cash paid	151,813
Tapingo | ISO
Business Acquisition [Line Items]
Fair value of assumed equity awards attributable to pre-combination service	(372)
Tapingo | Restaurant relationships
Business Acquisition [Line Items]
Intangible assets	11,279
Tapingo | Developed technology
Business Acquisition [Line Items]
Intangible assets	9,755
LevelUp
Business Acquisition [Line Items]
Accounts receivable		$ 6,201
Prepaid expenses and other current assets		1,396
Property and equipment		895
Goodwill		295,994
Net deferred tax asset		31,621
Accounts payable and accrued expenses		(3,121)
Total purchase price net of cash acquired		369,427
Net cash paid		366,833
LevelUp | ISO
Business Acquisition [Line Items]
Fair value of assumed equity awards attributable to pre-combination service		(2,594)
LevelUp | Restaurant relationships
Business Acquisition [Line Items]
Intangible assets		10,217
LevelUp | Diner acquisition
Business Acquisition [Line Items]
Intangible assets		3,912
LevelUp | Below-market lease intangible
Business Acquisition [Line Items]
Intangible assets		2,205
LevelUp | Developed technology
Business Acquisition [Line Items]
Intangible assets		$ 20,107
Tapingo and LevelUp
Business Acquisition [Line Items]
Accounts receivable	9,302
Prepaid expenses and other current assets	2,239
Property and equipment	895
Other assets	163
Goodwill	429,377
Net deferred tax asset	29,633
Accounts payable and accrued expenses	(7,599)
Total purchase price net of cash acquired	521,485
Net working capital adjustment receivable	127
Net cash paid	518,646
Tapingo and LevelUp | ISO
Business Acquisition [Line Items]
Fair value of assumed equity awards attributable to pre-combination service	(2,966)
Tapingo and LevelUp | Restaurant relationships
Business Acquisition [Line Items]
Intangible assets	21,496
Tapingo and LevelUp | Diner acquisition
Business Acquisition [Line Items]
Intangible assets	3,912
Tapingo and LevelUp | Below-market lease intangible
Business Acquisition [Line Items]
Intangible assets	2,205
Tapingo and LevelUp | Developed technology
Business Acquisition [Line Items]
Intangible assets	$ 29,862
Eat24
Business Acquisition [Line Items]
Accounts receivable			$ 8,267
Prepaid expenses and other current assets			221
Property and equipment			1,113
Goodwill			135,955
Accounts payable and accrued expenses			(30,082)
Total purchase price net of cash acquired			281,716
Net cash paid			281,442
Eat24 | Restricted Stock Units
Business Acquisition [Line Items]
Fair value of assumed equity awards attributable to pre-combination service			(274)
Eat24 | Restaurant relationships
Business Acquisition [Line Items]
Intangible assets			126,232
Eat24 | Diner acquisition
Business Acquisition [Line Items]
Intangible assets			35,226
Eat24 | Developed technology
Business Acquisition [Line Items]
Intangible assets			2,559
Eat24 | Trademarks
Business Acquisition [Line Items]
Intangible assets			2,225
Foodler
Business Acquisition [Line Items]
Accounts receivable				$ 307
Goodwill				17,452
Accounts payable and accrued expenses				(5,237)
Total purchase price net of cash acquired				51,122
Net cash paid				51,122
Foodler | Restaurant relationships
Business Acquisition [Line Items]
Intangible assets				35,217
Foodler | Diner acquisition
Business Acquisition [Line Items]
Intangible assets				1,354
Foodler | Developed technology
Business Acquisition [Line Items]
Intangible assets				1,955
Foodler | Trademarks
Business Acquisition [Line Items]
Intangible assets				$ 74
Eat24 and Foodler
Business Acquisition [Line Items]
Accounts receivable			8,574
Prepaid expenses and other current assets			221
Property and equipment			1,113
Goodwill			153,407
Accounts payable and accrued expenses			(35,319)
Total purchase price net of cash acquired			332,838
Net cash paid			332,564
Eat24 and Foodler | Restricted Stock Units
Business Acquisition [Line Items]
Fair value of assumed equity awards attributable to pre-combination service			(274)
Eat24 and Foodler | Restaurant relationships
Business Acquisition [Line Items]
Intangible assets			161,449
Eat24 and Foodler | Diner acquisition
Business Acquisition [Line Items]
Intangible assets			36,580
Eat24 and Foodler | Developed technology
Business Acquisition [Line Items]
Intangible assets			4,514
Eat24 and Foodler | Trademarks
Business Acquisition [Line Items]
Intangible assets			$ 2,299
LABite
Business Acquisition [Line Items]
Accounts receivable								$ 2,320
Prepaid expenses and other current assets								68
Property and equipment								257
Goodwill								40,235
Net deferred tax liability								(19,412)
Accounts payable and accrued expenses								(6,303)
Total purchase price net of cash acquired								65,849
LABite | Restaurant relationships
Business Acquisition [Line Items]
Intangible assets								46,513
LABite | Developed technology
Business Acquisition [Line Items]
Intangible assets								1,731
LABite | Trademarks
Business Acquisition [Line Items]
Intangible assets								$ 440

Acquisitions - Valuation Method

Acquisitions - Valuation Methods for Intangible Assets Acquired (Detail)	12 Months Ended
	Dec. 31, 2018
Restaurant relationships | Tapingo
Business Acquisition [Line Items]
Valuation Method	Multi-period excess earnings
Restaurant relationships | LevelUp
Business Acquisition [Line Items]
Valuation Method	With or without comparative business valuation
Restaurant relationships | Eat24
Business Acquisition [Line Items]
Valuation Method	Multi-period excess earnings
Restaurant relationships | Foodler
Business Acquisition [Line Items]
Valuation Method	Multi-period excess earnings
Diner acquisition | Tapingo
Business Acquisition [Line Items]
Valuation Method	n/a
Diner acquisition | LevelUp
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Diner acquisition | Eat24
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Diner acquisition | Foodler
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Developed technology | Tapingo
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Developed technology | LevelUp
Business Acquisition [Line Items]
Valuation Method	Multi-period excess earnings
Developed technology | Eat24
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Developed technology | Foodler
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Trademarks | Tapingo
Business Acquisition [Line Items]
Valuation Method	n/a
Trademarks | LevelUp
Business Acquisition [Line Items]
Valuation Method	n/a
Trademarks | Eat24
Business Acquisition [Line Items]
Valuation Method	Relief from royalty
Trademarks | Foodler
Business Acquisition [Line Items]
Valuation Method	Relief from royalty

Pro forma Summary of Operation

Pro forma Summary of Operation (Detail) - Tapingo, LevelUp, Eat24, and Foodler - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Revenues	$ 1,041,811	$ 782,895
Net income	$ 55,975	$ 41,008
Net income per share attributable to common shareholders:
Basic	$ 0.63	$ 0.48
Diluted	$ 0.61	$ 0.46

Pro Forma Adjustments for Addit

Pro Forma Adjustments for Additional Amortization of That Would Have Been Recognized on the Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Interest expense	$ 7,500	$ 2,100	$ 600
Income tax (benefit) expense	2,952	(9,335)	$ 34,295
Tapingo, LevelUp, Eat24, and Foodler | Pro Forma
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Depreciation and amortization	4,893	16,588
Transaction costs	(6,923)	1,293
Stock-based compensation	3,748	7,200
Interest expense	1,601	5,358
Other		4,690
Income tax (benefit) expense	$ (1,548)	$ (15,098)

Summary of Held-to-Maturity Mar

Summary of Held-to-Maturity Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	$ 27,051	$ 64,834
Unrealized Losses	(109)	(143)
Estimated Fair Value	26,942	64,691
Commercial Paper | Cash and Cash Equivalents
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	12,097	39,979
Unrealized Losses	(21)	(43)
Estimated Fair Value	12,076	39,936
Commercial Paper | Short Term Investments
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	13,334	21,480
Unrealized Losses	(88)	(99)
Estimated Fair Value	13,246	21,381
Corporate Bonds | Cash and Cash Equivalents
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	870	1,250
Estimated Fair Value	870	1,250
Corporate Bonds | Short Term Investments
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	750	2,125
Unrealized Losses		(1)
Estimated Fair Value	$ 750	$ 2,124

Marketable Securities - Additio

Marketable Securities - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Held To Maturity Securities [Line Items]
Marketable securities matured during the period and held in other interest-bearing accounts	$ 40,000,000
Other-than-temporary impairment losses related to marketable securities	0	$ 0	$ 0
Net Interest (Income) Expense
Schedule Of Held To Maturity Securities [Line Items]
Interest income	$ 4,000,000	$ 2,000,000	$ 1,300,000

Summary of Continuous Unrealize

Summary of Continuous Unrealized Loss on Marketable Securities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Held To Maturity Securities [Line Items]
Estimated Fair Value, Less Than 12 Months	$ 26,072	$ 64,691
Unrealized Loss, Less Than 12 Months	(109)	(143)
Estimated Fair Value, 12 Months or Greater	0	0
Unrealized Loss, 12 Months or Greater	0	0
Estimated Fair Value, Total	26,072	64,691
Unrealized Loss, Total	(109)	(143)
Commercial Paper
Schedule Of Held To Maturity Securities [Line Items]
Estimated Fair Value, Less Than 12 Months	25,322	61,317
Unrealized Loss, Less Than 12 Months	(109)	(142)
Estimated Fair Value, 12 Months or Greater	0	0
Unrealized Loss, 12 Months or Greater	0	0
Estimated Fair Value, Total	25,322	61,317
Unrealized Loss, Total	(109)	(142)
Corporate Bonds
Schedule Of Held To Maturity Securities [Line Items]
Estimated Fair Value, Less Than 12 Months	750	3,374
Unrealized Loss, Less Than 12 Months		(1)
Estimated Fair Value, 12 Months or Greater	0	0
Unrealized Loss, 12 Months or Greater	0	0
Estimated Fair Value, Total	$ 750	3,374
Unrealized Loss, Total		$ (1)

Components of Acquired Intangib

Components of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	$ 588,311	$ 515,463
Amortizable intangible assets, Accumulated Amortization	(128,974)	(89,586)
Amortizable intangible assets, Net Carrying Value	459,337	425,877
Indefinite-lived trademarks	89,676	89,676
Total acquired intangible assets, Gross Carrying Amount	677,987	605,139
Total acquired intangible assets, Net Carrying Value	549,013	515,553
Restaurant relationships
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	494,278	457,580
Amortizable intangible assets, Accumulated Amortization	(103,457)	(76,852)
Amortizable intangible assets, Net Carrying Value	390,821	380,728
Diner acquisition
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	47,541	40,247
Amortizable intangible assets, Accumulated Amortization	(10,306)	(1,906)
Amortizable intangible assets, Net Carrying Value	37,235	38,341
Developed technology
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	38,385	8,523
Amortizable intangible assets, Accumulated Amortization	(10,247)	(6,418)
Amortizable intangible assets, Net Carrying Value	28,138	2,105
Trademarks
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	2,225	2,225
Amortizable intangible assets, Accumulated Amortization	(2,225)	(402)
Amortizable intangible assets, Net Carrying Value		1,823
Below-market lease intangible
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	2,206
Amortizable intangible assets, Accumulated Amortization	(124)
Amortizable intangible assets, Net Carrying Value	2,082
Other
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	3,676	6,888
Amortizable intangible assets, Accumulated Amortization	(2,615)	(4,008)
Amortizable intangible assets, Net Carrying Value	$ 1,061	$ 2,880

Goodwill and Acquired Intangi_3

Goodwill and Acquired Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross carrying amount of intangible assets	$ 588,311	$ 515,463
Accumulated amortization of intangible assets no longer in use	128,974	89,586
Intangible assets amortization expense	$ 42,500	28,100	$ 20,900
Weighted Average Amortization Period (years)	13 years 10 months 24 days
LevelUp and Tapingo and OrderUp
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 76,100
Eat24, Foodler, OrderUp and payments to Zoomer
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets		$ 229,989
Disposal Group, Disposed of by Means Other than Sale, Not Discontinued Operations
Finite Lived Intangible Assets [Line Items]
Gross carrying amount of intangible assets	3,200
Accumulated amortization of intangible assets no longer in use	$ 2,500

Schedule of Carrying Amount of

Schedule of Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, Beginning Balance	$ 589,862	$ 436,455
Goodwill, Acquisition	429,377	153,407
Goodwill, Ending Balance	1,019,239	589,862
Net Book Value, Beginning Balance	589,862	436,455
Net Book Value, Acquisition	429,377	153,407
Net Book Value, Ending Balance	$ 1,019,239	$ 589,862

Components of Acquired Intang_2

Components of Acquired Intangibles Assets Added During the Years (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Finite Lived Intangible Assets [Line Items]
Weighted-Average Amortization Period	13 years 10 months 24 days
Tapingo and LevelUp and OrderUp
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 76,058
Eat24, Foodler, OrderUp and payments to Zoomer
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets		$ 229,989
Restaurant relationships | Tapingo and LevelUp and OrderUp
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 36,697
Weighted-Average Amortization Period	17 years 6 months
Restaurant relationships | Eat24, Foodler, OrderUp and payments to Zoomer
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets		$ 177,929
Weighted-Average Amortization Period		19 years 3 months 18 days
Developed technology | Tapingo and LevelUp and OrderUp
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 29,862
Weighted-Average Amortization Period	4 years 8 months 12 days
Developed technology | Eat24, Foodler, OrderUp and payments to Zoomer
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets		$ 4,514
Weighted-Average Amortization Period		6 months
Diner acquisition | Tapingo and LevelUp and OrderUp
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 7,294
Weighted-Average Amortization Period	5 years
Diner acquisition | Eat24, Foodler, OrderUp and payments to Zoomer
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets		$ 40,247
Weighted-Average Amortization Period		5 years
Below-market lease intangible | Tapingo and LevelUp and OrderUp
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 2,205
Weighted-Average Amortization Period	5 years 9 months 18 days
Trademarks | Eat24, Foodler, OrderUp and payments to Zoomer
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets		$ 2,299
Weighted-Average Amortization Period		1 year 2 months 12 days
Other | Eat24, Foodler, OrderUp and payments to Zoomer
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets		$ 5,000
Weighted-Average Amortization Period		2 years 9 months 18 days

Estimated Future Amortization o

Estimated Future Amortization of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
2,019	$ 47,445
2,020	44,770
2,021	39,120
2,022	37,150
2,023	30,644
Thereafter	260,208
Amortizable intangible assets, Net Carrying Value	$ 459,337	$ 425,877

Components of Property and Equi

Components of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Property and equipment	$ 198,092	$ 116,780
Accumulated depreciation and amortization	(78,597)	(45,396)
Property and equipment, net	119,495	71,384
Developed software
Property Plant And Equipment [Line Items]
Property and equipment	90,302	52,041
Computer equipment
Property Plant And Equipment [Line Items]
Property and equipment	50,767	31,601
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment	39,550	23,400
Furniture and fixtures
Property Plant And Equipment [Line Items]
Property and equipment	10,801	6,857
Purchased Software and Digital Assets
Property Plant And Equipment [Line Items]
Property and equipment	4,696	$ 2,881
Construction in progress
Property Plant And Equipment [Line Items]
Property and equipment	$ 1,976

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 85,940	$ 51,848	$ 35,193
Capitalized developed software costs	41,100	26,000	15,600
Property And Equipment Excluding Developed Software
Property Plant And Equipment [Line Items]
Depreciation and amortization	21,600	11,700	8,900
Leasehold Improvements, Developed Software, Furniture and Fixtures and Purchased Software and Digital Assets
Property Plant And Equipment [Line Items]
Gross carrying amount of property and equipment no longer in use	10,300
Accumulated amortization of property and equipment no longer in use	9,800
Developed software
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 21,800	$ 12,000	$ 5,400

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Loss Contingencies [Line Items]
Lease renewal period	5 years
Operating lease, rental expense	$ 13.1	$ 7.5	$ 5.6
Maximum | Merger Income Tax Consequences
Loss Contingencies [Line Items]
Indemnification related to business combination	$ 15

Future Minimum Lease Payments (

Future Minimum Lease Payments (Detail) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2,019	$ 13,009
2,020	14,874
2,021	14,243
2,022	12,219
2,023	12,220
Thereafter	57,503
Total	$ 124,068

Schedule of Debt (Detail)

Schedule of Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt	$ 335,548	$ 169,645
Previous Credit Agreement
Debt Instrument [Line Items]
Total debt	342,312	174,219
Less current portion	(6,250)	(3,906)
Less unamortized deferred debt issuance costs	(514)	(668)
Long-term debt	335,548	169,645
Previous Credit Agreement | Term loan
Debt Instrument [Line Items]
Total debt	120,312	124,219
Previous Credit Agreement | Revolving loan
Debt Instrument [Line Items]
Total debt	$ 222,000	$ 50,000

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	Oct. 10, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Long-term debt		$ 342,300,000
Proceeds from borrowings		222,000,000	$ 200,000,000
Repayment of borrowings		53,906,000	25,781,000
Unamortized Debt Issuance Expense		1,900,000	2,600,000
Interest expense		$ 7,500,000	$ 2,100,000	$ 600,000
Previous Credit Agreement
Debt Instrument [Line Items]
Credit facility, additional borrowing capacity	$ 150,000,000
Credit facility, expiration date	Oct. 9, 2022
Credit facility, borrowings interest rate description		Borrowings bore interest, at the Company’s option, based on LIBOR or an alternate base rate plus a margin.
Effective interest rate		3.82%	3.00%
Previous Credit Agreement | Minimum
Debt Instrument [Line Items]
Credit facility, commitment fee on undrawn portion available	0.20%
Previous Credit Agreement | Maximum
Debt Instrument [Line Items]
Credit facility, commitment fee on undrawn portion available	0.30%
Previous Credit Agreement | LIBOR | Minimum
Debt Instrument [Line Items]
Credit facility, variable rate	1.25%
Previous Credit Agreement | LIBOR | Maximum
Debt Instrument [Line Items]
Credit facility, variable rate	2.00%
Previous Credit Agreement | Base Rate | Minimum
Debt Instrument [Line Items]
Credit facility, variable rate	0.25%
Previous Credit Agreement | Base Rate | Maximum
Debt Instrument [Line Items]
Credit facility, variable rate	1.00%
Previous Credit Agreement | Revolving Loans
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 225,000,000
Proceeds from borrowings		$ 222,000,000
Previous Credit Agreement | Term Loans
Debt Instrument [Line Items]
Long-term debt	$ 125,000,000

Schedule of Future Maturities o

Schedule of Future Maturities of Principal Payments (Detail) - Previous Credit Agreement - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
2,019	$ 6,250
2,020	6,250
2,021	7,031
2,022	322,781
Total debt	$ 342,312	$ 174,219

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($)	Nov. 07, 2018	May 20, 2015	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Sep. 14, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options, Granted			675,643
Stock options expire period from the date of grant			10 years
Stock-based compensation			$ 55,261,000	$ 32,748,000	$ 23,559,000
Total unrecognized stock-based compensation expense			$ 169,400,000
Unrecognized compensation expense recognition period			2 years 10 months 24 days
Recognized excess tax benefits from stock-based compensation					(24,906,000)
Excess tax benefits related to stock-based compensation					24,906,000
Stock-based compensation capitalized as website and software development cost			$ 9,000,000	4,500,000	2,100,000
Aggregate intrinsic value of awards exercised			38,700,000	19,500,000	30,200,000
Aggregate intrinsic value			86,880,000
ASU 2016-09 | Income Tax Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized excess tax benefits from stock-based compensation			15,900,000	7,100,000
Excess tax benefits from stock-based compensation			$ 15,900,000	7,100,000
Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Term for share-based awards issued to employees			2 years
Stock-based compensation			$ 0	0	1,700,000
Fair value of awards vested during the period					1,700,000
Unrecognized compensation expense related to share based awards other than options			0
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation			$ 17,700,000	11,800,000	12,300,000
Unrecognized compensation expense recognition period			2 years 6 months
Unrecognized stock-based compensation expense			$ 34,200,000
Stock Options | Tapingo and LevelUp
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expense			11,700,000
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation			$ 37,600,000	20,900,000	9,600,000
Unrecognized compensation expense recognition period			3 years
Fair value of awards vested during the period			$ 96,300,000	$ 27,300,000	$ 5,800,000
Unrecognized compensation expense related to share based awards other than options			$ 135,200,000
Non-vested restricted stock units or awards expected to vest			2,316,461
Weighted average grant date fair value			$ 67.14
2015 Long-Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares reserved for issuance		14,256,901
Options, Granted			347,891	618,899	166,272
Shares of common stock authorized			3,729,176
Common stock shares available for issuance			3,729,176
Term for share-based awards issued to employees			4 years
2015 Long-Term Incentive Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options expire period from the date of grant			10 years
2013 Omnibus Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options, Granted		0
Term for share-based awards issued to employees			4 years
2013 Omnibus Incentive Plan | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options expire period from the date of grant			10 years
Tapingo and LevelUp ISOs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock shares reserved for issuance	91,338					236,414
Options, Granted	0		327,752
Aggregate intrinsic value			$ 13,100,000
Tapingo and LevelUp ISOs | Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options expire period from the date of grant			10 years

Assumptions Used to Determine F

Assumptions Used to Determine Fair Value of Stock Options Granted (Detail) - $ / shares		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted-average fair value options granted		$ 66.19	$ 15.19	$ 12.59
Average risk-free interest rate		2.61%	1.65%	1.41%
Expected stock price volatility	[1]	46.40%	48.70%	49.70%
Dividend yield		0.00%	0.00%	0.00%
Expected stock option life (years)	[2]	3 years 6 months 3 days	4 years	5 years 10 months 2 days
[1]	Prior to the first quarter of 2018, the expected stock price volatility was based on a combination of the historical and implied volatilities of comparable publicly-traded companies and the historical volatility of the Company’s own common stock due to its limited trading history as there was no active external or internal market for the Company’s common stock prior to the Company’s initial public offering in April 2014.
[2]	The expected term for Tapingo and LevelUp assumed ISO awards was calculated based on their respective remaining vesting periods as of the acquisition date. During the year ended December 31, 2016, the expected term of option awards was estimated using a simplified method due to the limited period of time stock-based awards had been exercisable.

Stock Option Activity (Detail)

Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Options
Options, Beginning Balance	2,705,849
Options, Granted	675,643
Options, Forfeited	(206,986)
Options, Exercised	(523,667)
Options, Ending Balance	2,650,839	2,705,849
Options, Vested and expected to vest	2,649,081
Options, Exercisable	1,599,731
Weighted-Average Exercise Price
Weighted-Average Exercise Price, Beginning Balance	$ 25.53
Weighted-Average Exercise Price, Granted	62.89
Weighted-Average Exercise Price, Forfeited	46.27
Weighted-Average Exercise Price, Exercised	27.10
Weighted-Average Exercise Price, Ending Balance	33.13	$ 25.53
Weighted-Average Exercise Price, Vested and expected to vest	33.11
Weighted-Average Exercise Price, Exercisable	$ 22.91
Aggregate Intrinsic Value/Weighted-Average Exercise Term
Aggregate Intrinsic Value	$ 120,977	$ 125,197
Aggregate Intrinsic Value, Vested and expected to vest	120,926
Aggregate Intrinsic Value, Exercisable	$ 86,880
Weighted-Average Exercise Term, Outstanding Balance	6 years 10 months 13 days	7 years 3 months 10 days
Weighted-Average Exercise Term, Vested and expected to vest	6 years 10 months 13 days
Weighted-Average Exercise Term, Exercisable	6 years 10 days

Non-vested Restricted Stock Uni

Non-vested Restricted Stock Units (Detail) - Restricted Stock Units	12 Months Ended
	Dec. 31, 2018$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Beginning Balance | shares	2,454,801
Shares, Granted | shares	1,325,499
Shares, Forfeited | shares	(462,684)
Shares, Vested | shares	(988,759)
Shares, Ending Balance | shares	2,328,857
Weighted-Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 37.56
Weighted-Average Grant Date Fair Value, Granted | $ / shares	94.41
Weighted-Average Grant Date Fair Value, Forfeited | $ / shares	52.72
Weighted-Average Grant Date Fair Value, Vested | $ / shares	36.55
Weighted-Average Grant Date Fair Value, Ending Balance | $ / shares	$ 67.33

Income Tax Provision (Detail)

Income Tax Provision (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Current:
Federal	$ (2,934)	$ 16,852	$ 24,509
State	3,827	4,721	8,132
Foreign	335	271	338
Total current	1,228	21,844	32,979
Deferred:
Federal	2,608	(30,794)	800
State	(884)	(385)	516
Total deferred	1,724	(31,179)	1,316
Total income tax (benefit) expense	$ 2,952	$ (9,335)	$ 34,295

Income Before Provision for Inc

Income Before Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments [Abstract]
Domestic source	$ 80,878	$ 88,357	$ 82,033
Foreign source	555	1,291	1,819
Income before provision for income taxes	$ 81,433	$ 89,648	$ 83,852

Reconciliation of Income Taxes

Reconciliation of Income Taxes Computed at U.S. Federal Statutory Rate to Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense at statutory rate	$ 17,101	$ 31,377	$ 29,348
State income taxes	1,248	5,011	5,621
Effect of federal rate change		(36,768)
Stock-based compensation	(15,924)	(7,072)
Excess compensation	1,753
Research and development tax credit	(1,470)	(800)	(638)
Uncertain tax position	(545)	(55)
Foreign rate differential	(57)	(203)	(273)
Unremitted earnings tax		363
All other	846	(1,188)	237
Total income tax (benefit) expense	$ 2,952	$ (9,335)	$ 34,295

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax [Line Items]
Corporate income tax rate	21.00%	35.00%
Income tax (benefit) expense	$ 2,952,000	$ (9,335,000)	$ 34,295,000
Tax liability related to one-time tax on unremitted foreign earnings		363,000
Valuation reserve, Recorded	$ 23,840,000	4,803,000
Income tax examination description	In July 2018, the examination in New York for corporate income tax returns for the tax years ended December 31, 2014, 2015 and 2016 was completed with no material findings. The Company does not expect any material additional tax liabilities, penalties and/or interest as a result of the audit.
Significant adjustments to unrecognized tax benefits within the next twelve months	As of December 31, 2018, the remaining reserve related to the Company’s New York and New York City unitary position for the year ending December 31, 2014 was reversed due to the closing of the statute of limitations.
Unrecognized tax liabilities, interest expense or penalties	$ 0
Unrecognized Tax liabilities, penalties		0
Maximum
Income Tax [Line Items]
Unrecognized Tax liabilities, interest expense		100,000
ASU 2016-09
Income Tax [Line Items]
Cumulative effect adjustment to retained earnings		2,552,000
Foreign Subsidiaries
Income Tax [Line Items]
Tax exemption percentage on foreign source portion of dividends from foreign subsidiaries	100.00%
Withholding taxes on undistributed foreign earnings repatriated	$ 0
Additional tax liability, unremitted foreign earnings	0
U.S
Income Tax [Line Items]
Valuation reserve, Recorded	8,400,000	4,800,000
Israeli
Income Tax [Line Items]
Valuation allowances recorded on net operating loss	$ 15,400,000
Tax Cuts and Jobs Act
Income Tax [Line Items]
Income tax (benefit) expense		(34,100,000)
Tax liability related to one-time tax on unremitted foreign earnings		$ 400,000

Deferred Income Tax Assets and

Deferred Income Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Loss and credit carryforwards	$ 72,466	$ 11,184
Accrued expenses	4,128	2,089
Stock-based compensation	8,832	9,914
Fixed assets - state	2,295
Total deferred tax assets	87,721	23,187
Valuation allowance	(23,840)	(4,803)
Net deferred tax assets	63,881	18,384
Deferred tax liabilities:
Fixed assets	(8,607)	(5,909)
Intangible assets	(101,451)	(86,462)
Prepaid expenses	(206)	(305)
Total deferred tax liabilities	(110,264)	(92,676)
Net deferred tax liability	$ (46,383)	$ (74,292)

Tax Loss and Credit Carryforwar

Tax Loss and Credit Carryforwards (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017
U.S. federal
Tax Credit Carryforward [Line Items]
Tax loss carryforwards		$ 29,853	$ 595
Tax loss carryforwards, Expiration year		Dec. 31, 2027
State and Local
Tax Credit Carryforward [Line Items]
Tax loss carryforwards		$ 18,147	4,362
Tax loss carryforwards, Expiration year		Dec. 31, 2027
Israeli
Tax Credit Carryforward [Line Items]
Tax loss carryforwards		$ 15,382
Tax loss carryforwards, Expiration year		Indefinite
Illinois Edge
Tax Credit Carryforward [Line Items]
Tax credit carryforwards	[1]	$ 11,992	$ 8,422
Tax credit carryforwards, Expiration year	[1]	Dec. 31, 2018
Research and development | U.S. federal
Tax Credit Carryforward [Line Items]
Tax credit carryforwards		$ 1,986
Tax credit carryforwards, Expiration year		Dec. 31, 2028
Research and development | State and Local
Tax Credit Carryforward [Line Items]
Tax credit carryforwards		$ 1,710
Tax credit carryforwards, Expiration year		Dec. 31, 2018
[1]	Amounts are before the federal benefit of state tax

Unrecognized Tax Benefit Activi

Unrecognized Tax Benefit Activity Excluding Related Accrual for Interest (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Balance at beginning of period	$ 2,864	$ 3,345
Reductions for tax positions taken in prior years	(2,260)	(937)
Additions for tax positions taken in the current year	147	456
Balance at end of period	$ 751	$ 2,864

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	Apr. 25, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Jan. 22, 2016
Class Of Stock [Line Items]
Number of votes per share		one vote per share
Common stock, shares authorized		500,000,000	500,000,000
Common stock, shares issued		90,756,548	86,790,624
Common stock, shares outstanding		90,756,548	86,790,624
Treasury stock, shares		0	0
Aggregate purchase price		$ 200,000,000
Preferred Stock, shares authorized		25,000,000	25,000,000
Preferred Stock, shares issued		0	0
Preferred Stock, shares outstanding		0	0
Common stock
Class Of Stock [Line Items]
Stock Issued and sold		2,820,464
Common stock repurchased, Shares				724,473
Common stock | Stock Repurchase Program
Class Of Stock [Line Items]
Stock repurchase program, announced date		Jan. 25, 2016
Common stock repurchased and retired, Shares				724,473
Common stock repurchased, Shares		0	0
Common stock repurchased and retired, Average Price Paid per Share				$ 20.37
Common stock repurchased and retired				$ 14,774,000
Common stock | Maximum | Stock Repurchase Program
Class Of Stock [Line Items]
Authorized to repurchase of common stock					$ 100,000,000
Investment Agreement | Common stock | Accredited Investor
Class Of Stock [Line Items]
Stock Issued and sold	2,820,464
Aggregate purchase price	$ 200,000,000

Retirement Plan - Additional In

Retirement Plan - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan matching contributions amount	$ 3.5	$ 2.3	$ 1.7
First Eligible Employee Percentage
Defined Benefit Plan Disclosure [Line Items]
Companies matching on eligible employee contribution percentage	100.00%	100.00%	100.00%
Defined benefit plan eligible employee percentage	3.00%	3.00%	3.00%
Second Eligible Employee Percentage
Defined Benefit Plan Disclosure [Line Items]
Companies matching on eligible employee contribution percentage	50.00%	50.00%	50.00%
Defined benefit plan eligible employee percentage	2.00%	2.00%	2.00%

Earnings Per Share Attributab_3

Earnings Per Share Attributable to Common Stockholders - Additional Information (Detail) - Common stock - USD ($) $ / shares in Units, $ in Thousands	Apr. 25, 2018	Dec. 31, 2016
Stock Repurchase Program
Class Of Stock [Line Items]
Common stock repurchased and retired, Shares		724,473
Common stock repurchased and retired, average price paid per share		$ 20.37
Common stock repurchased and retired		$ 14,774
Investment Agreement | Accredited Investor
Class Of Stock [Line Items]
Shares issued and sold	2,820,464

Computation of Basic and Dilute

Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Basic earnings per share:
Net income attributable to common stockholders (numerator)	$ 78,481	$ 98,983	$ 49,557
Shares used in computation (denominator)
Weighted-average common shares outstanding	89,447	86,297	85,069
Basic earnings per share	$ 0.88	$ 1.15	$ 0.58
Diluted earnings per share:
Net income attributable to common stockholders (numerator)	$ 78,481	$ 98,983	$ 49,557
Shares used in computation (denominator)
Weighted-average common shares outstanding	89,447	86,297	85,069
Effect of dilutive securities:
Weighted-average diluted shares	92,354	88,182	86,135	[1]
Diluted earnings per share	$ 0.85	$ 1.12	$ 0.58
Stock Options
Effect of dilutive securities:
Stock options, Restricted stock units and restricted stock awards, shares	1,601	1,059	792
Restricted Stock Units and Restricted Stock Awards
Effect of dilutive securities:
Stock options, Restricted stock units and restricted stock awards, shares	1,306	826	274
[1]	Prior to the adoption of ASU 2016-09, the treasury stock method calculation of weighted-average dilutive shares outstanding for the year ended December 31, 2016 included the estimated impact of tax benefits and deficiencies.

Anti-dilutive Securities Exclud

Anti-dilutive Securities Excluded from Calculation of Diluted Net Income Per Share (Detail) - shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Stock Options
Anti-dilutive shares underlying stock-based awards:
Anti-dilutive shares underlying stock-based awards	216,451	0	552,108
Restricted Stock Units
Anti-dilutive shares underlying stock-based awards:
Anti-dilutive shares underlying stock-based awards	222,984	35,646	212,170

Schedule of Fair Value and Carr

Schedule of Fair Value and Carrying Value of Assets and Liabilities Recorded at Other Than Fair Value (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Fair Value | Level 2
Assets
Assets, fair value disclosure	$ 27,003	$ 64,784
Fair Value | Level 3
Liabilities
Long-term debt, including current maturities	342,745	175,700
Total liabilities	342,745	175,700
Carrying Value
Assets
Assets, fair value disclosure	27,112	64,927
Liabilities
Long-term debt, including current maturities	342,312	174,219
Total liabilities	342,312	174,219
Money Market Funds | Fair Value | Level 2
Assets
Assets, fair value disclosure	61	93
Money Market Funds | Carrying Value
Assets
Assets, fair value disclosure	61	93
Commercial Paper | Fair Value | Level 2
Assets
Assets, fair value disclosure	25,322	61,317
Commercial Paper | Carrying Value
Assets
Assets, fair value disclosure	25,431	61,459
Corporate Bonds | Fair Value | Level 2
Assets
Assets, fair value disclosure	1,620	3,374
Corporate Bonds | Carrying Value
Assets
Assets, fair value disclosure	$ 1,620	$ 3,375

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($)	Feb. 06, 2019	Oct. 10, 2017	Feb. 28, 2019	Dec. 31, 2018
Subsequent Event [Line Items]
Long-term debt				$ 342,300,000
Previous Credit Agreement
Subsequent Event [Line Items]
Credit facility, additional borrowing capacity		$ 150,000,000
Credit facility, expiration date		Oct. 9, 2022
Previous Credit Agreement | Minimum
Subsequent Event [Line Items]
Credit facility, commitment fee on undrawn portion available		0.20%
Previous Credit Agreement | Maximum
Subsequent Event [Line Items]
Credit facility, commitment fee on undrawn portion available		0.30%
Previous Credit Agreement | LIBOR | Minimum
Subsequent Event [Line Items]
Credit facility, variable rate		1.25%
Previous Credit Agreement | LIBOR | Maximum
Subsequent Event [Line Items]
Credit facility, variable rate		2.00%
Previous Credit Agreement | Base Rate | Minimum
Subsequent Event [Line Items]
Credit facility, variable rate		0.25%
Previous Credit Agreement | Base Rate | Maximum
Subsequent Event [Line Items]
Credit facility, variable rate		1.00%
Previous Credit Agreement | Revolving Loans
Subsequent Event [Line Items]
Credit facility, maximum borrowing capacity		$ 225,000,000
Previous Credit Agreement | Term Loans
Subsequent Event [Line Items]
Long-term debt		$ 125,000,000
Subsequent Event
Subsequent Event [Line Items]
Long-term debt			$ 342,300,000
Subsequent Event | Revolving Loans
Subsequent Event [Line Items]
Long-term debt			17,300,000
Subsequent Event | Term Loans
Subsequent Event [Line Items]
Long-term debt			$ 325,000,000
Subsequent Event | Credit Agreement
Subsequent Event [Line Items]
Credit facility, additional borrowing capacity	$ 250,000,000
Credit facility, expiration date	Feb. 5, 2024
Credit facility, origination fee and other expenses	$ 1,500,000
Subsequent Event | Credit Agreement | Minimum
Subsequent Event [Line Items]
Credit facility, commitment fee on undrawn portion available	0.15%
Subsequent Event | Credit Agreement | Maximum
Subsequent Event [Line Items]
Credit facility, commitment fee on undrawn portion available	0.275%
Subsequent Event | Credit Agreement | LIBOR | Minimum
Subsequent Event [Line Items]
Credit facility, variable rate	1.125%
Subsequent Event | Credit Agreement | LIBOR | Maximum
Subsequent Event [Line Items]
Credit facility, variable rate	1.175%
Subsequent Event | Credit Agreement | Base Rate | Minimum
Subsequent Event [Line Items]
Credit facility, variable rate	0.125%
Subsequent Event | Credit Agreement | Base Rate | Maximum
Subsequent Event [Line Items]
Credit facility, variable rate	0.75%
Subsequent Event | Credit Agreement | Revolving Loans
Subsequent Event [Line Items]
Credit facility, maximum borrowing capacity	$ 225,000,000
Subsequent Event | Credit Agreement | Term Loans
Subsequent Event [Line Items]
Long-term debt	325,000,000
Subsequent Event | Previous Credit Agreement
Subsequent Event [Line Items]
Long-term debt	350,000,000
Credit facility, origination fee and other expenses	$ 1,800,000