GrubHub 10-Q 6 Nov 18 2018 Q3 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	9 Months Ended
	Sep. 30, 2018	Nov. 02, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q3
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 Common Stock, Shares Outstanding		90,701,489

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 294,550	$ 234,090
Short-term investments	16,687	23,605
Accounts receivable, less allowances for doubtful accounts	120,306	87,377
Income tax receivable	14,125	8,593
Prepaid expenses and other current assets	17,024	6,818
Total current assets	462,692	360,483
PROPERTY AND EQUIPMENT:
Property and equipment, net of depreciation and amortization	105,434	71,384
OTHER ASSETS:
Other assets	11,666	6,487
Goodwill	885,350	589,862
Acquired intangible assets, net of amortization	520,867	515,553
Total other assets	1,417,883	1,111,902
TOTAL ASSETS	1,986,009	1,543,769
CURRENT LIABILITIES:
Restaurant food liability	122,900	119,922
Accounts payable	17,184	7,607
Accrued payroll	19,036	13,186
Taxes payable	1,566	3,109
Short-term debt	6,250	3,906
Other accruals	33,186	26,818
Total current liabilities	200,122	174,548
LONG-TERM LIABILITIES:
Deferred taxes, non-current	44,073	74,292
Other accruals	19,683	7,468
Long-term debt	290,073	169,645
Total long-term liabilities	353,829	251,405
Commitments and contingencies
STOCKHOLDERS’ EQUITY:
Preferred Stock, $0.0001 par value. Authorized: 25,000,000 shares as of September 30, 2018 and December 31, 2017; issued and outstanding: no shares as of September 30, 2018 and December 31, 2017.
Common stock, $0.0001 par value. Authorized: 500,000,000 shares at September 30, 2018 and December 31, 2017; issued and outstanding: 90,598,259 and 86,790,624 shares as of September 30, 2018 and December 31, 2017, respectively	9	9
Accumulated other comprehensive loss	(1,620)	(1,228)
Additional paid-in capital	1,079,165	849,043
Retained earnings	354,504	269,992
Total Stockholders’ Equity	1,432,058	1,117,816
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,986,009	$ 1,543,769

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 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	90,598,259	86,790,624
Common stock, shares outstanding	90,598,259	86,790,624

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Revenues	$ 247,225	$ 163,059	$ 719,536	$ 477,987
Costs and expenses:
Operations and support	111,511	65,352	310,239	187,795
Sales and marketing	49,426	35,138	144,413	105,346
Technology (exclusive of amortization)	21,258	14,292	57,306	41,560
General and administrative	22,195	18,617	58,072	46,627
Depreciation and amortization	20,987	12,613	61,787	33,067
Total costs and expenses	225,377	146,012	631,817	414,395
Income from operations	21,848	17,047	87,719	63,592
Interest (income) expense - net	337	(373)	1,367	(908)
Income before provision for income taxes	21,511	17,420	86,352	64,500
Income tax (benefit) expense	(1,234)	4,432	2,721	19,043
Net income attributable to common stockholders	$ 22,745	$ 12,988	$ 83,631	$ 45,457
Net income per share attributable to common stockholders:
Basic	$ 0.25	$ 0.15	$ 0.94	$ 0.53
Diluted	$ 0.24	$ 0.15	$ 0.91	$ 0.52
Weighted-average shares used to compute net income per share attributable to common stockholders:
Basic	90,494	86,449	89,027	86,162
Diluted	93,678	88,543	92,091	87,788

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 22,745	$ 12,988	$ 83,631	$ 45,457
OTHER COMPREHENSIVE INCOME (LOSS)
Foreign currency translation adjustments	(92)	299	(392)	749
COMPREHENSIVE INCOME	$ 22,653	$ 13,287	$ 83,239	$ 46,206

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 83,631	$ 45,457
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	16,189	7,949
Provision for doubtful accounts	741	338
Deferred taxes	2,048	(2,162)
Amortization of intangible assets	45,598	25,118
Stock-based compensation	36,445	23,913
Deferred rent	3,975	130
Amortization of deferred loan costs	588	349
Other	(732)	(823)
Change in assets and liabilities, net of the effects of business acquisitions:
Accounts receivable	(17,969)	(15,903)
Income taxes receivable	(5,533)	3,795
Prepaid expenses and other assets	(15,455)	4,193
Restaurant food liability	1,608	4,591
Accounts payable	5,265	2,965
Accrued payroll	5,311	1,575
Other accruals	3,752	6,351
Net cash provided by operating activities	165,462	107,836
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisitions of businesses, net of cash acquired	(366,856)	(51,859)
Purchases of investments	(47,642)	(145,667)
Proceeds from maturity of investments	54,916	164,733
Capitalized website and development costs	(21,471)	(15,281)
Purchases of property and equipment	(31,984)	(12,549)
Acquisition of other intangible assets		(25,147)
Other cash flows from investing activities	38	589
Net cash used in investing activities	(412,999)	(85,181)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from the issuance of common stock	200,000
Proceeds from borrowings under the Credit Agreement	175,000
Repayments of borrowings under the Credit Agreement	(52,344)
Proceeds from exercise of stock options	13,010	12,505
Taxes paid related to net settlement of stock-based compensation awards	(28,238)	(7,696)
Payments for debt issuance costs		(285)
Net cash provided by financing activities	307,428	4,524
Net change in cash, cash equivalents, and restricted cash	59,891	27,179
Effect of exchange rates on cash, cash equivalents and restricted cash	(406)	709
Cash, cash equivalents, and restricted cash at beginning of year	238,239	242,214
Cash, cash equivalents, and restricted cash at end of the period	297,724	270,102
SUPPLEMENTAL DISCLOSURE OF NON-CASH ITEMS
Cash paid for income taxes	7,508	16,340
Capitalized property, equipment and website and development costs in accounts payable at period end	4,069	1,048
Net working capital adjustment receivable	530	887
Fair value of equity awards assumed on acquisition	2,594
RECONCILIATION OF CASH, CASH EQUIVALENTS, AND RESTRICTED CASH
Cash and cash equivalents	$ 294,550	265,958
Restricted cash included in prepaid expenses and other current assets		$ 1,500
Restricted Cash, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:PrepaidExpenseAndOtherAssetsCurrent	us-gaap:PrepaidExpenseAndOtherAssetsCurrent
Restricted cash included in other assets	$ 3,174	$ 2,644
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Total cash, cash equivalents, and restricted cash	$ 297,724	$ 270,102

Organization

Organization	9 Months Ended
	Sep. 30, 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 platform for restaurant pick-up and delivery orders. 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 at no cost to the diner. The Company charges the restaurant a per order commission that is largely fee based. In certain markets, the Company also provides delivery services to restaurants on its platform that do not have their own delivery operations.

Significant Accounting Policies

Significant Accounting Policies	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Significant Accounting Policies	2. Significant Accounting Policies Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated interim financial statements include the accounts of Grubhub Inc. and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in accordance with the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. These unaudited condensed consolidated interim financial statements include all wholly-owned subsidiaries and reflect all normal and recurring adjustments, as well as any other than normal adjustments, that are, in the opinion of management, necessary for a fair presentation of the results for the interim periods and should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017 filed with the SEC on February 28, 2018 (the “2017 Form 10-K”). All significant intercompany transactions have been eliminated in consolidation. Operating results for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2018. On January 1, 2018, the Company adopted Financial Accounting Standards Board (the “FASB”) Revenue from Contracts with Customers Recently Issued Accounting Pronouncements Revenue, Use of Estimates The preparation of condensed consolidated financial statements in accordance 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 definite lives and other long-lived assets, stock-based compensation and income taxes. Actual results could differ from these estimates. Changes in Accounting Principle See “ Recently Issued Accounting Pronouncements ” below for a description of accounting principle changes adopted during the nine months ended September 30, 2018 related to revenue and the statement of cash flows. Recently Issued Accounting Pronouncements In August 2018, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update No. 2018-15, “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract” (“ASU 2018-15”). ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in hosting arrangements that are service contracts and that include an internal-use software license with the requirement for capitalizing implementation costs incurred to develop or obtain internal-use software. The capitalized implementation costs are required to be expensed over the term of the hosting arrangement. The guidance also clarifies the presentation requirements for reporting such costs in the entity’s financial statements. The Company has elected to early adopt ASU 2018-15. The amendments will be applied prospectively to all implementation costs incurred after the date of adoption. Company’s consolidated financial position, results of operations or cash flows. In May 2017, 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. Accounting Standards Update No. 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. 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 these ASUs 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 $0.1 million and $0.9 million for the three and nine months September 30, 2018, respectively, • Beginning in January 1, 2018, the Company defers the incremental costs of obtaining contracts as contract acquisition assets resulting in a net decrease of $2.0 million and $6.6 million in sales and marketing expense in the condensed consolidated statements of operations for the three and nine months September 30, 2018, respectively, • 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 $0.3 million and $0.9 million in revenues in the condensed consolidated statements of operations during the three and nine months September 30, 2018, respectively, and a corresponding decrease in other accruals of $2.0 million on the condensed 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 decrease and $0.1 million increase in revenues in the condensed consolidated statements of operations during the three and nine months ended September 30, 2018, respectively. • 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 condensed consolidated statement of cash flows for the nine months ended See Note 3, Revenue,

Revenue

Revenue	9 Months Ended
	Sep. 30, 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 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 that use the Company’s delivery services pay an additional commission for the use of those services. The Company may also charge a delivery 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 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 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 related to current orders that create an obligation to discount future orders, the Company allocates the incentives that are expected to be redeemed proportionally to current and future orders based on their relative expected transaction prices. 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. 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. During the three months ended September 30, 2018, the Company recognized a small amount of revenues from software and professional services, which are generally recognized ratably over the subscription period beginning on the date the software is available. Revenues for certain professional services may be recognized in full once the services are performed if they are distinct and separately identifiable. Accounts Receivable Accounts receivable primarily represent the net cash due from the Company’s payment processor for cleared transactions and amounts owed from corporate customers, 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 based on historical loss experience and any current or forecasted specific risks. Deferred Revenues The Company’s deferred revenues consist primarily of gift card liabilities and certain incentive liabilities. 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 contracts including certain 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.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2018
Business Combinations [Abstract]
Acquisitions	4. Acquisitions 2018 Acquisitions On September 13, 2018, the Company acquired SCVNGR, Inc. d/b/a LevelUp (“LevelUp”) for approximately $369.7 million, including $367.6 million of cash paid (net of cash acquired of $6.0 million), $2.6 million of other non-cash consideration and a net working capital adjustment receivable of $0.5 million. LevelUp is a leading provider of mobile diner engagement and payment solutions for national and regional restaurant brands. The acquisition of LevelUp is expected to simplify the Company’s integrations with restaurants’ systems, increase diner engagement and accelerate product development. The Company assumed LevelUp employees’ unvested incentive stock option (“ISO”) awards as of the closing date. Approximately $2.6 million of the fair value of the assumed ISO awards granted to acquired LevelUp employees was attributable to the pre-combination services of the LevelUp awardees and was included in the $369.7 million purchase price. This amount is reflected within goodwill in the purchase price allocation. As of the acquisition date, post-combination expense of approximately $17.0 million is expected to be recognized related to the assumed ISO awards over the remaining post-combination service period. The results of operations of LevelUp have been included in the Company’s financial statements since September 13, 2018 but did not have a material impact on the Company’s condensed consolidated results of operations for the three and nine months ended September 30, 2018. The excess of the consideration transferred in the acquisition over the net amounts assigned to the fair value of the assets was recorded as goodwill, which represents the value of LevelUp’s technology team and the ability to simplify integrations with restaurants on the Company’s platform The assets acquired and liabilities assumed of LevelUp were recorded at their estimated fair values as of the closing date of September 13, 2018. The following table summarizes the preliminary purchase price allocation acquisition-date fair values of the asset and liabilities acquired in connection with the LevelUp acquisition: LevelUp (in thousands) Accounts receivable $ 6,201 Prepaid expenses and other current assets 1,396 Property and equipment 895 Restaurant relationships 10,217 Diner acquisition 3,912 Below-market lease intangible 2,205 Developed technology 20,107 Goodwill 295,488 Net deferred tax asset 32,267 Accounts payable and accrued expenses (3,031 ) Total purchase price net of cash acquired $ 369,657 Net working capital adjustment receivable 530 Fair value of assumed ISOs attributable to pre-combination service (2,594 ) Net cash paid $ 367,593 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 $281.8 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. Eat24 provides online and mobile food ordering for restaurants and diners across the United States. The acquisition expanded the breadth and depth of the Company’s national network of restaurant partners and active diners. The Company granted 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 $281.8 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 is 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 $51.2 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 were recorded as goodwill, which represents the value of increasing the breadth and depth of the Company’s network of restaurants and diners. The total goodwill related to the acquisitions of Eat24 and Foodler of $153.4 million is expected to be deductible for income tax purposes. 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) Cash $ 40 $ 86 $ 126 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 plus cash acquired 281,756 51,208 332,964 Fair value of replacement RSUs attributable to pre-combination service (274 ) — (274 ) Cash acquired (40 ) (86 ) (126 ) Net cash paid $ 281,442 $ 51,122 $ 332,564 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 LevelUp Foodler Eat24 Restaurant relationships With or without comparative business valuation Multi-period excess earnings Multi-period excess earnings Diner acquisition Cost to recreate Cost to recreate Cost to recreate Developed technology Multi-period excess earnings Cost to recreate Cost to recreate Trademark n/a Relief from royalty Relief from royalty The fair value of the 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 condensed consolidated statements of operations for the three months ended September 30, 2018 and 2017 of $2.6 Pro Forma The following unaudited pro forma information presents a summary of the operating results of the Company for the three and nine months ended September 30, 2018 and 2017 as if the acquisitions of LevelUp, Eat24 and Foodler had occurred as of January 1 of the year prior to acquisition: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands, except per share data) Revenues $ 255,777 $ 190,833 $ 746,545 $ 562,364 Net income 22,352 5,084 75,348 15,869 Net income per share attributable to common shareholders: Basic $ 0.25 $ 0.06 $ 0.85 $ 0.18 Diluted $ 0.24 $ 0.06 $ 0.82 $ 0.18 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 three and nine months ended September 30, 2018 and 2017 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Depreciation and amortization $ (186 ) $ 2,085 $ (248 ) $ 9,488 Transaction costs (2,646 ) (1,799 ) (5,010 ) 846 Stock-based compensation (458 ) 728 2,325 3,748 Interest expense 33 1,128 244 3,547 Other — 1,571 — 4,401 Income tax (benefit) expense 964 (1,546 ) 796 (9,367 ) The unaudited pro forma revenues and net income are not intended to represent or be indicative of the Company’s condensed 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	9 Months Ended
	Sep. 30, 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 September 30, 2018 and December 31, 2017 were as follows: September 30, 2018 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (in thousands) Cash and cash equivalents Commercial paper $ 10,231 $ — $ (12 ) $ 10,219 Short-term investments Commercial paper 14,938 — (112 ) 14,826 Corporate bonds 1,749 — — 1,749 Total $ 26,918 $ — $ (124 ) $ 26,794 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 September 30, 2018. Approximately $40 million of the Company’s marketable securities matured during the nine months ended September 30, 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 September 30, 2018 and December 31, 2017 were as follows: September 30, 2018 Less Than 12 Months 12 Months or Greater Total Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Loss (in thousands) Commercial paper $ 25,045 $ (124 ) $ — $ — $ 25,045 $ (124 ) Total $ 25,045 $ (124 ) $ — $ — $ 25,045 $ (124 ) December 31, 2017 Less Than 12 Months 12 Months or Greater Total Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Loss 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 three months ended September 30, 2018 and 2017 of $1.3 million and $0.5 million, respectively, and for the nine months ended September 30, 2018 and 2017 of $3.2 million and $1.5 million, respectively, within net interest (income) expense on the condensed consolidated statements of operations. During the three and nine months ended September 30, 2018 and 2017, 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 14, Fair Value Measurement,

Goodwill and Acquired Intangibl

Goodwill and Acquired Intangible Assets	9 Months Ended
	Sep. 30, 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 September 30, 2018 and December 31, 2017 were as follows: September 30, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Value Gross Amount Accumulated Amortization Net Value (in thousands) Restaurant relationships $ 467,797 $ (96,321 ) $ 371,476 $ 457,580 $ (76,852 ) $ 380,728 Diner acquisition 44,159 (7,982 ) 36,177 40,247 (1,906 ) 38,341 Developed technology 28,630 (8,591 ) 20,039 8,523 (6,418 ) 2,105 Trademarks 2,225 (2,225 ) — 2,225 (402 ) 1,823 Below-market lease intangible 2,206 (21 ) 2,185 — — — Other 3,676 (2,362 ) 1,314 6,888 (4,008 ) 2,880 Total amortizable intangible assets 548,693 (117,502 ) 431,191 515,463 (89,586 ) 425,877 Indefinite-lived trademarks 89,676 — 89,676 89,676 — 89,676 Total acquired intangible assets $ 638,369 $ (117,502 ) $ 520,867 $ 605,139 $ (89,586 ) $ 515,553 The gross carrying amount and accumulated amortization of the Company’s other intangible assets as of September 30, 2018 were adjusted by $3.2 million and $2.5 million, respectively, for certain assets that were no longer in use. Amortization expense for acquired intangible assets was $10.0 million and $6.4 million for the three months ended September 30, 2018 and 2017, respectively, and $31.1 million and $16.8 million for the nine months The changes in the carrying amount of goodwill during the nine months ended September 30, 2018 were as follows: Goodwill Accumulated Impairment Losses Net Book Value (in thousands) Balance as of December 31, 2017 $ 589,862 $ — $ 589,862 Acquisition of LevelUp 295,488 — 295,488 Balance as of September 30, 2018 $ 885,350 $ — $ 885,350 During the nine months Nine Months Ended September 30, 2018 Amount Weighted-Average Amortization Period (in thousands) (years) Developed technology $ 20,107 6.0 Restaurant relationships 10,217 19.0 Diner acquisition 3,912 5.0 Below-market lease intangible 2,205 5.8 Total $ 36,441 Estimated future amortization expense of acquired intangible assets as of September 30, 2018 was as follows: (in thousands) The remainder of 2018 $ 10,117 2019 38,485 2020 37,315 2021 37,304 2022 35,334 Thereafter 272,636 Total $ 431,191

Property and Equipment

Property and Equipment	9 Months Ended
	Sep. 30, 2018
Property Plant And Equipment [Abstract]
Property and Equipment	7. Property and Equipment The components of the Company’s property and equipment as of September 30, 2018 and December 31, 2017 were as follows: September 30, 2018 December 31, 2017 (in thousands) Developed software $ 78,332 $ 52,041 Computer equipment 44,896 31,601 Leasehold improvements 31,809 23,400 Furniture and fixtures 8,704 6,857 Purchased software and digital assets 3,581 2,881 Construction in progress 5,559 — Property and equipment 172,881 116,780 Accumulated depreciation and amortization (67,447 ) (45,396 ) Property and equipment, net $ 105,434 $ 71,384 The Company recorded depreciation and amortization expense for property and equipment other than developed software of $5.7 million and $2.9 million for the three months ended September 30, 2018 and 2017, respectively, and $16.2 million and $8.0 million for the nine months 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 September 30, 2018 were adjusted in aggregate by $8.6 million and $8.2 million, respectively, for certain assets that were no longer in use. The Company capitalized developed software costs of $10.8 million and $6.8 million for the three months ended September 30, 2018 and 2017, respectively, and $28.1 million and $18.9 million for the nine months

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 30, 2018
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	8. Commitments and Contingencies 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”). In March 2012, Ameranth initiated eight additional actions for infringement of a related patent, U.S. Patent No. 8,146,077 (“’077 patent”), in the same forum, including separate actions against Grubhub Holdings Inc., Case No. 3:12-cv-739 (“’739 action”), and Seamless North America, LLC, Case No. 3:12-cv-737 (“’737 action”). In August 2012, the Court severed the claims against Grubhub Holdings Inc. and Seamless North America, LLC in the ’1810 action and consolidated them with the ’739 action and the ’737 action, respectively. Later, the Court consolidated these separate cases against Grubhub Holdings Inc. and Seamless North America, LLC, along with the approximately 40 other cases Ameranth filed in the same district, with the original ’1810 action. In their answers, Grubhub Holdings Inc. and Seamless North America, LLC denied infringement and interposed various defenses, including non-infringement, invalidity, unenforceability and inequitable conduct. The consolidated district court case was stayed until January 2017, when Ameranth’s motion to lift the stay and proceed on only the ‘077 patent was granted. In September 2018, the court granted summary judgment of unpatentability on the ‘077 patent and vacated the December 3, 2018 jury trial date for the claims against Grubhub Holdings Inc. and Seamless North America, LLC. The Company believes this case lacks merit and that it has strong defenses to all of the infringement claims. The Company intends to defend the suit vigorously. However, the Company is unable to predict the likelihood of success of Ameranth’s infringement claims and is unable to predict the likelihood of success of its counterclaims. The Company has not recorded an accrual related to this lawsuit as of September 30, 2018 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	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Debt	9. Debt The following table summarizes the carrying value of the Company’s debt as of September 30, 2018 and December 31, 2017: September 30, 2018 December 31, 2017 (in thousands) Term loan $ 121,875 $ 124,219 Revolving loan 175,000 50,000 Total debt 296,875 174,219 Less current portion (6,250 ) (3,906 ) Less unamortized deferred debt issuance costs (552 ) (668 ) Long-term debt $ 290,073 $ 169,645 On October 10, 2017, the Company entered into a credit agreement which provides, among other things, for aggregate revolving loans up to $225 million and term loans in an aggregate principal amount of $125 million (the “Credit Agreement”). In addition, the Company may incur up to $150 million of incremental revolving loans or incremental revolving term loans pursuant to the terms and conditions of the Credit Agreement. The credit facility will be available to the Company until October 9, 2022. There have been no changes in the terms of the Credit Agreement during the nine months ended September 30, 2018. During the nine months ended September 30, 2018, the Company borrowed $175.0 million of revolving loans under the Credit Agreement. The Company utilized the revolving loan proceeds to finance a portion of the purchase price and transaction costs in connection with the acquisition of LevelUp. During the nine months ended September 30, 2018, the Company made principal payments of $52.3 million from cash on hand. As of September 30, 2018, outstanding borrowings under the Credit Agreement were $296.9 million. The fair value of the Company’s outstanding debt approximates its carrying value as of September 30, 2018 (see Note 14, Fair Value Measurement , for additional details) . The Company was in compliance with the covenants of the Credit Agreement as of September 30, 2018 . Additional capacity under the Credit Agreement may be used for general corporate purposes, including funding working capital and future acquisitions . Interest expense includes interest on outstanding borrowings, amortization of debt issuance costs and commitment fees on the undrawn portion available under the Credit Agreement. The Company recognized interest expense of $1.7 million and $0.2 million, during the three months ended September 30, 2018 and 2017, respectively, and $4.6 million and $0.6 million during the nine months ended September 30, 2018 and 2017, respectively.

Stock-Based Compensation

Stock-Based Compensation	9 Months Ended
	Sep. 30, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-Based Compensation	10. Stock-Based Compensation The Company has granted non-qualified and incentive stock options, restricted stock units and restricted stock awards under its incentive plans. Stock-based Compensation Expense The total stock-based compensation expense related to all stock-based awards was $14.2 million and $8.5 million during the three months ended September 30, 2018 and 2017, respectively, and $36.4 million and $23.9 million during the nine months ended September 30, 2018 and 2017, respectively As of September 30, 2018, $175.7 million of total unrecognized stock-based compensation expense is expected to be recognized over a weighted-average period of 3.0 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 units in excess of the deferred tax assets that were previously recorded. During the three months ended September 30, 2018 and the Company recognized excess tax benefits from stock-based compensation of $7.6 $21.5 million and $5.7 million during the nine months ended September 30, 2018 and , respectively, within income tax (benefit) expense on the condensed consolidated statements of operations and within cash flows from operating activities on the condensed consolidated statements of cash flows. The Company capitalized stock-based compensation expense as website and software development costs of September 30, 2018 and 2017, respectively, and $6.3 million and $3.3 million during the Stock Options The Company granted 584,305 , including unvested ISOs assumed with the acquisition of LevelUp, and 618,899 stock options during the nine months ended September 30, 2018 and 2017, respectively. 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 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 nine months ended September 30, 2018 and 2017 were as follows: Nine Months Ended September 30, 2018 2017 Weighted-average fair value options granted $ 65.86 $ 15.19 Average risk-free interest rate 2.55 % 1.65 % Expected stock price volatility (a) 46.1 % 48.7 % Dividend yield None None Expected stock option life (years) (b) 3.64 4.00 (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 the LevelUp assumed ISO awards was calculated based on their respective remaining vesting periods as of the acquisition date. Stock option awards as of December 31, 2017 and September 30, 2018, and changes during the ended , 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 584,305 68.74 Forfeited (115,035 ) 34.21 Exercised (487,317 ) 26.70 Outstanding at September 30, 2018 2,687,802 34.34 280,279 7.11 Vested and expected to vest at September 30, 2018 2,682,769 34.28 279,912 7.10 Exercisable at September 30, 2018 1,415,269 $ 21.73 $ 165,427 6.10 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 LevelUp ISOs as of September 30, 2018 was approximately $23.0 million. This amount will change in future periods based on the fair value of the Company’s stock and the number of options outstanding. 2017 nine months ended September 30, 2018 and 2017 was $36.1 million and $13.7 million, respectively. The Company recorded compensation expense for stock options of $4.5 2017 nine months ended September 30, 2018 and 2017, respectively Restricted Stock Units Non-vested restricted stock units as of December 31, 2017 September 30, 2018 nine months September 30, 2018 Restricted Stock Units Shares Weighted-Average Grant Date Fair Value Outstanding at December 31, 2017 2,454,801 $ 37.56 Granted 1,107,806 94.35 Forfeited (292,409 ) 51.67 Vested (796,579 ) 35.94 Outstanding at September 30, 2018 2,473,619 $ 61.84 C ompensation expense related to restricted stock units was $9.7 September 30, 2018 and 2017 , nine months ended September 30, 2018 and 2017, respectively September 30, 2018 2017 nine months ended September 30, 2018 and 2017, respectively September 30, 2018

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The Company’s effective tax rate was negative 5.7% and 25.4% during the three months ended September 30, 2018 and 2017 nine months ended September 30, 2018 and 2017, respectively ended September 30, 2018 and 2017 nine months ended September 30, 2018 and 2017 Stock-based Compensation federal corporate income tax rate decreased from 35% to 21% during the same periods as a result of the Tax Cuts and Jobs Act. 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.

Stockholders' Equity

Stockholders' Equity	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Stockholders' Equity	12. Stockholders’ Equity As of September 30, 2018 and December 31, 2017 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 September 30, 2018 and December 31, 2017, there were 500,000,000 shares of common stock authorized. At September 30, 2018 and December 31, 2017, there were 90,598,259 and 86,790,624 shares issued and outstanding, respectively. The Company did not hold any shares as treasury shares as of September 30, 2018 or December 31, 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. The 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 Preferred Stock The Company was authorized to issue 25,000,000 shares of preferred stock. There were no issued or outstanding shares of preferred stock as of September 30, 2018 or December 31, 2017 The Company’s equity as of December 31, 2017 and September 30, 2018 , and changes during the nine months ended September 30, 2018 , were as follows: (in thousands) Balance at December 31, 2017 $ 1,117,816 Net income 83,631 Cumulative effect of change in accounting principle (a) 882 Currency translation (392 ) Stock-based compensation 42,755 Shares repurchased and retired to satisfy tax withholding upon vesting (28,238 ) Stock option exercises, net of withholdings and other 13,010 Stock-based compensation, assumed ISO awards 2,594 Issuance of common stock 200,000 Balance at September 30, 2018 $ 1,432,058 (a) See Note 2, Significant Accounting Policies nine months September 30, 2018.

Earnings Per Share Attributable

Earnings Per Share Attributable to Common Stockholders	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Earnings Per Share Attributable to Common Stockholders	13. 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 and restricted stock units, 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 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 nine months ended September 30, 2018 Stockholders’ Equity The following tables present the calculation of basic and diluted net income per share attributable to common stockholders for the three and nine months ended September 30, 2018 and 2017 Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Income (Numerator) Shares (Denominator) Per Share Amount Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share data) Basic EPS Net income attributable to common stockholders $ 22,745 90,494 $ 0.25 $ 12,988 86,449 $ 0.15 Effect of Dilutive Securities Stock options — 1,704 — 1,105 Restricted stock units — 1,480 — 989 Diluted EPS Net income attributable to common stockholders $ 22,745 93,678 $ 0.24 $ 12,988 88,543 $ 0.15 Nine Months Ended September 30, 2018 Nine Months Ended September 30, 2017 Income (Numerator) Shares (Denominator) Per Share Amount Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share data) Basic EPS Net income attributable to common stockholders $ 83,631 89,027 $ 0.94 $ 45,457 86,162 $ 0.53 Effect of Dilutive Securities Stock options — 1,649 — 951 Restricted stock units — 1,415 — 675 Diluted EPS Net income attributable to common stockholders $ 83,631 92,091 $ 0.91 $ 45,457 87,788 $ 0.52 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 three and nine months ended September 30, 2018 and 2017 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Anti-dilutive shares underlying stock-based awards: Stock options 251,582 685,671 251,582 685,671 Restricted stock units 84,668 84,358 84,668 84,358

Fair Value Measurement

Fair Value Measurement	9 Months Ended
	Sep. 30, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurement	14. 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 September 30, 2018 and December 31, 2017 September 30, 2018 December 31, 2017 Level 2 Level 3 Carrying Value Level 2 Level 3 Carrying Value (in thousands) Assets Money market funds $ 18 $ — $ 18 $ 93 $ — $ 93 Commercial paper 25,045 — 25,169 61,317 — 61,459 Corporate bonds 1,749 — 1,749 3,374 — 3,375 Total assets $ 26,812 $ — $ 26,936 $ 64,784 $ — $ 64,927 Liabilities Long-term debt, including current maturities — 303,001 296,875 — 175,700 174,219 Total liabilities $ — $ 303,001 $ 296,875 $ — $ 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	9 Months Ended
	Sep. 30, 2018
Subsequent Events [Abstract]
Subsequent Events	On September 25, 2018, the Company entered into a share purchase agreement by and among the Company, Grubhub Holdings Inc., Tapingo Ltd. (“Tapingo”), Shareholder Representative Services LLC, solely in its capacity as representative of the securityholders, and other parties signatory thereto, to acquire all of the issued and outstanding shares of Tapingo. Tapingo is a leading platform for campus food ordering with direct integration into college meal plans and point of sale systems. The acquisition is expected to enhance the Company’s diner network on college campuses. On September 12, 2018, the Company entered into a definitive agreement to complete the acquisition of substantially all of the restaurant and diner network assets of OrderUp, Inc. (“OrderUp”), a wholly-owned subsidiary of Groupon, Inc. The Company previously completed the acquisition of certain assets of OrderUp on September 14, 2017. Pursuant to the purchase agreements, the Company will acquire Tapingo and certain additional assets of OrderUp for total aggregate consideration of approximately $170 million, subject to customary adjustments and closing conditions. The purchase price is currently expected to be funded through a combination of cash on hand and proceeds from borrowings under

Significant Accounting Polici_2

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2018
Accounting Policies [Abstract]
Basis of Presentation and Principles of Consolidation	Basis of Presentation and Principles of Consolidation The accompanying unaudited condensed consolidated interim financial statements include the accounts of Grubhub Inc. and have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and in accordance with the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. These unaudited condensed consolidated interim financial statements include all wholly-owned subsidiaries and reflect all normal and recurring adjustments, as well as any other than normal adjustments, that are, in the opinion of management, necessary for a fair presentation of the results for the interim periods and should be read in conjunction with the consolidated financial statements and accompanying notes included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017 filed with the SEC on February 28, 2018 (the “2017 Form 10-K”). All significant intercompany transactions have been eliminated in consolidation. Operating results for the three and nine months ended September 30, 2018 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2018. On January 1, 2018, the Company adopted Financial Accounting Standards Board (the “FASB”) Revenue from Contracts with Customers Recently Issued Accounting Pronouncements Revenue,
Use of Estimates	Use of Estimates The preparation of condensed consolidated financial statements in accordance 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 definite lives and other long-lived assets, stock-based compensation and income taxes. Actual results could differ from these estimates.
Changes in Accounting Principle	Changes in Accounting Principle See “ Recently Issued Accounting Pronouncements ” below for a description of accounting principle changes adopted during the nine months ended September 30, 2018 related to revenue and the statement of cash flows.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In August 2018, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update No. 2018-15, “Intangibles – Goodwill and Other – Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract” (“ASU 2018-15”). ASU 2018-15 aligns the requirements for capitalizing implementation costs incurred in hosting arrangements that are service contracts and that include an internal-use software license with the requirement for capitalizing implementation costs incurred to develop or obtain internal-use software. The capitalized implementation costs are required to be expensed over the term of the hosting arrangement. The guidance also clarifies the presentation requirements for reporting such costs in the entity’s financial statements. The Company has elected to early adopt ASU 2018-15. The amendments will be applied prospectively to all implementation costs incurred after the date of adoption. Company’s consolidated financial position, results of operations or cash flows. In May 2017, 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. Accounting Standards Update No. 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. 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 these ASUs 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 $0.1 million and $0.9 million for the three and nine months September 30, 2018, respectively, • Beginning in January 1, 2018, the Company defers the incremental costs of obtaining contracts as contract acquisition assets resulting in a net decrease of $2.0 million and $6.6 million in sales and marketing expense in the condensed consolidated statements of operations for the three and nine months September 30, 2018, respectively, • 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 $0.3 million and $0.9 million in revenues in the condensed consolidated statements of operations during the three and nine months September 30, 2018, respectively, and a corresponding decrease in other accruals of $2.0 million on the condensed 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 decrease and $0.1 million increase in revenues in the condensed consolidated statements of operations during the three and nine months ended September 30, 2018, respectively. • 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 condensed consolidated statement of cash flows for the nine months ended See Note 3, Revenue,
Accounts Receivable	Accounts Receivable Accounts receivable primarily represent the net cash due from the Company’s payment processor for cleared transactions and amounts owed from corporate customers, 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 based on historical loss experience and any current or forecasted specific risks.
Deferred Revenues	Deferred Revenues The Company’s deferred revenues consist primarily of gift card liabilities and certain incentive liabilities. 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.

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2018
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 LevelUp acquisition: LevelUp (in thousands) Accounts receivable $ 6,201 Prepaid expenses and other current assets 1,396 Property and equipment 895 Restaurant relationships 10,217 Diner acquisition 3,912 Below-market lease intangible 2,205 Developed technology 20,107 Goodwill 295,488 Net deferred tax asset 32,267 Accounts payable and accrued expenses (3,031 ) Total purchase price net of cash acquired $ 369,657 Net working capital adjustment receivable 530 Fair value of assumed ISOs attributable to pre-combination service (2,594 ) Net cash paid $ 367,593
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) Cash $ 40 $ 86 $ 126 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 plus cash acquired 281,756 51,208 332,964 Fair value of replacement RSUs attributable to pre-combination service (274 ) — (274 ) Cash acquired (40 ) (86 ) (126 ) Net cash paid $ 281,442 $ 51,122 $ 332,564
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 LevelUp Foodler Eat24 Restaurant relationships With or without comparative business valuation Multi-period excess earnings Multi-period excess earnings Diner acquisition Cost to recreate Cost to recreate Cost to recreate Developed technology Multi-period excess earnings Cost to recreate Cost to recreate Trademark 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 three and nine months ended September 30, 2018 and 2017 as if the acquisitions of LevelUp, Eat24 and Foodler had occurred as of January 1 of the year prior to acquisition: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands, except per share data) Revenues $ 255,777 $ 190,833 $ 746,545 $ 562,364 Net income 22,352 5,084 75,348 15,869 Net income per share attributable to common shareholders: Basic $ 0.25 $ 0.06 $ 0.85 $ 0.18 Diluted $ 0.24 $ 0.06 $ 0.82 $ 0.18
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 three and nine months ended September 30, 2018 and 2017 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 (in thousands) Depreciation and amortization $ (186 ) $ 2,085 $ (248 ) $ 9,488 Transaction costs (2,646 ) (1,799 ) (5,010 ) 846 Stock-based compensation (458 ) 728 2,325 3,748 Interest expense 33 1,128 244 3,547 Other — 1,571 — 4,401 Income tax (benefit) expense 964 (1,546 ) 796 (9,367 )

Marketable Securities (Tables)

Marketable Securities (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2018 and December 31, 2017 were as follows: September 30, 2018 Amortized Cost Unrealized Gains Unrealized Losses Estimated Fair Value (in thousands) Cash and cash equivalents Commercial paper $ 10,231 $ — $ (12 ) $ 10,219 Short-term investments Commercial paper 14,938 — (112 ) 14,826 Corporate bonds 1,749 — — 1,749 Total $ 26,918 $ — $ (124 ) $ 26,794 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 September 30, 2018 and December 31, 2017 were as follows: September 30, 2018 Less Than 12 Months 12 Months or Greater Total Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Loss (in thousands) Commercial paper $ 25,045 $ (124 ) $ — $ — $ 25,045 $ (124 ) Total $ 25,045 $ (124 ) $ — $ — $ 25,045 $ (124 ) December 31, 2017 Less Than 12 Months 12 Months or Greater Total Estimated Fair Value Unrealized Loss Estimated Fair Value Unrealized Loss 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)	9 Months Ended
	Sep. 30, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Components of Acquired Intangible Assets (Finite Lived)	The components of acquired intangible assets as of September 30, 2018 and December 31, 2017 were as follows: September 30, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Value Gross Amount Accumulated Amortization Net Value (in thousands) Restaurant relationships $ 467,797 $ (96,321 ) $ 371,476 $ 457,580 $ (76,852 ) $ 380,728 Diner acquisition 44,159 (7,982 ) 36,177 40,247 (1,906 ) 38,341 Developed technology 28,630 (8,591 ) 20,039 8,523 (6,418 ) 2,105 Trademarks 2,225 (2,225 ) — 2,225 (402 ) 1,823 Below-market lease intangible 2,206 (21 ) 2,185 — — — Other 3,676 (2,362 ) 1,314 6,888 (4,008 ) 2,880 Total amortizable intangible assets 548,693 (117,502 ) 431,191 515,463 (89,586 ) 425,877 Indefinite-lived trademarks 89,676 — 89,676 89,676 — 89,676 Total acquired intangible assets $ 638,369 $ (117,502 ) $ 520,867 $ 605,139 $ (89,586 ) $ 515,553
Components of Acquired Intangible Assets (Infinite Lived)	The components of acquired intangible assets as of September 30, 2018 and December 31, 2017 were as follows: September 30, 2018 December 31, 2017 Gross Carrying Amount Accumulated Amortization Net Value Gross Amount Accumulated Amortization Net Value (in thousands) Restaurant relationships $ 467,797 $ (96,321 ) $ 371,476 $ 457,580 $ (76,852 ) $ 380,728 Diner acquisition 44,159 (7,982 ) 36,177 40,247 (1,906 ) 38,341 Developed technology 28,630 (8,591 ) 20,039 8,523 (6,418 ) 2,105 Trademarks 2,225 (2,225 ) — 2,225 (402 ) 1,823 Below-market lease intangible 2,206 (21 ) 2,185 — — — Other 3,676 (2,362 ) 1,314 6,888 (4,008 ) 2,880 Total amortizable intangible assets 548,693 (117,502 ) 431,191 515,463 (89,586 ) 425,877 Indefinite-lived trademarks 89,676 — 89,676 89,676 — 89,676 Total acquired intangible assets $ 638,369 $ (117,502 ) $ 520,867 $ 605,139 $ (89,586 ) $ 515,553
Changes in Carrying Amount of Goodwill	The changes in the carrying amount of goodwill during the nine months ended September 30, 2018 were as follows: Goodwill Accumulated Impairment Losses Net Book Value (in thousands) Balance as of December 31, 2017 $ 589,862 $ — $ 589,862 Acquisition of LevelUp 295,488 — 295,488 Balance as of September 30, 2018 $ 885,350 $ — $ 885,350
Components of Acquired Intangibles Assets Added During the Period (Finite Lived)	The components of the acquired intangible assets added during the nine months Nine Months Ended September 30, 2018 Amount Weighted-Average Amortization Period (in thousands) (years) Developed technology $ 20,107 6.0 Restaurant relationships 10,217 19.0 Diner acquisition 3,912 5.0 Below-market lease intangible 2,205 5.8 Total $ 36,441
Estimated Future Amortization of Acquired Intangible Assets	Estimated future amortization expense of acquired intangible assets as of September 30, 2018 was as follows: (in thousands) The remainder of 2018 $ 10,117 2019 38,485 2020 37,315 2021 37,304 2022 35,334 Thereafter 272,636 Total $ 431,191

Property and Equipment (Tables)

Property and Equipment (Tables)	9 Months Ended
	Sep. 30, 2018
Property Plant And Equipment [Abstract]
Components of Property and Equipment	The components of the Company’s property and equipment as of September 30, 2018 and December 31, 2017 were as follows: September 30, 2018 December 31, 2017 (in thousands) Developed software $ 78,332 $ 52,041 Computer equipment 44,896 31,601 Leasehold improvements 31,809 23,400 Furniture and fixtures 8,704 6,857 Purchased software and digital assets 3,581 2,881 Construction in progress 5,559 — Property and equipment 172,881 116,780 Accumulated depreciation and amortization (67,447 ) (45,396 ) Property and equipment, net $ 105,434 $ 71,384

Debt (Tables)

Debt (Tables)	9 Months Ended
	Sep. 30, 2018
Debt Disclosure [Abstract]
Schedule of Debt	The following table summarizes the carrying value of the Company’s debt as of September 30, 2018 and December 31, 2017: September 30, 2018 December 31, 2017 (in thousands) Term loan $ 121,875 $ 124,219 Revolving loan 175,000 50,000 Total debt 296,875 174,219 Less current portion (6,250 ) (3,906 ) Less unamortized deferred debt issuance costs (552 ) (668 ) Long-term debt $ 290,073 $ 169,645

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	9 Months Ended
	Sep. 30, 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 nine months ended September 30, 2018 and 2017 were as follows: Nine Months Ended September 30, 2018 2017 Weighted-average fair value options granted $ 65.86 $ 15.19 Average risk-free interest rate 2.55 % 1.65 % Expected stock price volatility (a) 46.1 % 48.7 % Dividend yield None None Expected stock option life (years) (b) 3.64 4.00 (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 the LevelUp assumed ISO awards was calculated based on their respective remaining vesting periods as of the acquisition date.
Summary of Stock Option Activity	Stock option awards as of December 31, 2017 and September 30, 2018, and changes during the ended , 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 584,305 68.74 Forfeited (115,035 ) 34.21 Exercised (487,317 ) 26.70 Outstanding at September 30, 2018 2,687,802 34.34 280,279 7.11 Vested and expected to vest at September 30, 2018 2,682,769 34.28 279,912 7.10 Exercisable at September 30, 2018 1,415,269 $ 21.73 $ 165,427 6.10
Non-vested Restricted Stock Units	Non-vested restricted stock units as of December 31, 2017 September 30, 2018 nine months September 30, 2018 Restricted Stock Units Shares Weighted-Average Grant Date Fair Value Outstanding at December 31, 2017 2,454,801 $ 37.56 Granted 1,107,806 94.35 Forfeited (292,409 ) 51.67 Vested (796,579 ) 35.94 Outstanding at September 30, 2018 2,473,619 $ 61.84

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2018
Equity [Abstract]
Equity and Changes in Equity During Period	The Company’s equity as of December 31, 2017 and September 30, 2018 , and changes during the nine months ended September 30, 2018 , were as follows: (in thousands) Balance at December 31, 2017 $ 1,117,816 Net income 83,631 Cumulative effect of change in accounting principle (a) 882 Currency translation (392 ) Stock-based compensation 42,755 Shares repurchased and retired to satisfy tax withholding upon vesting (28,238 ) Stock option exercises, net of withholdings and other 13,010 Stock-based compensation, assumed ISO awards 2,594 Issuance of common stock 200,000 Balance at September 30, 2018 $ 1,432,058 (a) See Note 2, Significant Accounting Policies nine months September 30, 2018.

Earnings Per Share Attributab_2

Earnings Per Share Attributable to Common Stockholders (Tables)	9 Months Ended
	Sep. 30, 2018
Earnings Per Share [Abstract]
Computation of Basic and Diluted Net Income Per Share	The following tables present the calculation of basic and diluted net income per share attributable to common stockholders for the three and nine months ended September 30, 2018 and 2017 Three Months Ended September 30, 2018 Three Months Ended September 30, 2017 Income (Numerator) Shares (Denominator) Per Share Amount Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share data) Basic EPS Net income attributable to common stockholders $ 22,745 90,494 $ 0.25 $ 12,988 86,449 $ 0.15 Effect of Dilutive Securities Stock options — 1,704 — 1,105 Restricted stock units — 1,480 — 989 Diluted EPS Net income attributable to common stockholders $ 22,745 93,678 $ 0.24 $ 12,988 88,543 $ 0.15 Nine Months Ended September 30, 2018 Nine Months Ended September 30, 2017 Income (Numerator) Shares (Denominator) Per Share Amount Income (Numerator) Shares (Denominator) Per Share Amount (in thousands, except per share data) Basic EPS Net income attributable to common stockholders $ 83,631 89,027 $ 0.94 $ 45,457 86,162 $ 0.53 Effect of Dilutive Securities Stock options — 1,649 — 951 Restricted stock units — 1,415 — 675 Diluted EPS Net income attributable to common stockholders $ 83,631 92,091 $ 0.91 $ 45,457 87,788 $ 0.52
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 three and nine months ended September 30, 2018 and 2017 were as follows: Three Months Ended September 30, Nine Months Ended September 30, 2018 2017 2018 2017 Anti-dilutive shares underlying stock-based awards: Stock options 251,582 685,671 251,582 685,671 Restricted stock units 84,668 84,358 84,668 84,358

Fair Value Measurement (Tables)

Fair Value Measurement (Tables)	9 Months Ended
	Sep. 30, 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 September 30, 2018 and December 31, 2017 September 30, 2018 December 31, 2017 Level 2 Level 3 Carrying Value Level 2 Level 3 Carrying Value (in thousands) Assets Money market funds $ 18 $ — $ 18 $ 93 $ — $ 93 Commercial paper 25,045 — 25,169 61,317 — 61,459 Corporate bonds 1,749 — 1,749 3,374 — 3,375 Total assets $ 26,812 $ — $ 26,936 $ 64,784 $ — $ 64,927 Liabilities Long-term debt, including current maturities — 303,001 296,875 — 175,700 174,219 Total liabilities $ — $ 303,001 $ 296,875 $ — $ 175,700 $ 174,219

Significant Accounting Polici_3

Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Jan. 01, 2018	Dec. 31, 2017
Significant Accounting Policies [Line Items]
Revenues	$ 247,225	$ 163,059	$ 719,536	$ 477,987
Effect on sales and marketing	49,426	$ 35,138	144,413	$ 105,346
Retained earnings	354,504		354,504			$ 269,992
Other accruals	33,186		$ 33,186			$ 26,818
Capitalized Contract Cost
Significant Accounting Policies [Line Items]
Contract acquisition assets, estimated service period			4 years
Adjustments | ASC Topic 606
Significant Accounting Policies [Line Items]
Revenues	100		$ 900
Adjustments | ASC Topic 606 | Adjustment, Unredeemed Gift Card Breakage Income
Significant Accounting Policies [Line Items]
Revenues	300		900
Retained earnings					$ 900
Other accruals	(2,000)		(2,000)
Adjustments | ASC Topic 606 | Incentives, Refunds and Adjustments
Significant Accounting Policies [Line Items]
Revenues	(100)		100
Adjustments | ASC Topic 606 | Capitalized Contract Cost
Significant Accounting Policies [Line Items]
Effect on sales and marketing	(2,000)		(6,600)
Effect on other assets	$ 2,000		$ 6,600
Contract acquisition assets, estimated service period			4 years

Revenue - Additional Informatio

Revenue - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Capitalized Contract Cost [Line Items]
Capitalized contract acquisition costs	$ 2.4	$ 7.3
Contract acquisition assets amortization	$ 0.4	$ 0.7
Capitalized Contract Cost
Capitalized Contract Cost [Line Items]
Contract acquisition assets, estimated service period		4 years

Acquisitions - Additional Infor

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands	Sep. 13, 2018	Oct. 10, 2017	Aug. 23, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Business Acquisition [Line Items]
Net cash payments to acquire businesses						$ 366,856	$ 51,859
Fair value of replacement awards granted to acquired business employees						2,594
Net working capital adjustment receivable						530	887
Goodwill				$ 885,350		885,350		$ 589,862
General and administrative expenses
Business Acquisition [Line Items]
Direct and indirect expense incurred related to acquisitions				$ 2,600	$ 1,700	$ 5,100	$ 3,600
LevelUp
Business Acquisition [Line Items]
Acquisition date	Sep. 13, 2018
Total purchase price net of cash acquired	$ 369,657
Net cash payments to acquire businesses	367,593
Cash acquired in business acquisition	6,000
Net working capital adjustment receivable	530
Goodwill	295,488
LevelUp | ISO
Business Acquisition [Line Items]
Fair value of replacement awards granted to acquired business employees	2,594
Post combination expense expected to be recognized related to replacement awards	$ 17,000
Eat24
Business Acquisition [Line Items]
Acquisition date		Oct. 10, 2017
Net cash payments to acquire businesses		$ 281,442
Cash acquired in business acquisition		40
Goodwill		135,955
Total purchase price plus cash acquired		281,756
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
Net cash payments to acquire businesses			$ 51,122
Cash acquired in business acquisition			86
Goodwill			17,452
Total purchase price plus cash acquired			51,208
Eat24 and Foodler
Business Acquisition [Line Items]
Net cash payments to acquire businesses		332,564
Cash acquired in business acquisition		126
Goodwill		153,407
Total purchase price plus cash acquired		332,964
Goodwill expected to be deductible for income tax purposes			$ 153,400
Eat24 and Foodler | Restricted Stock Units
Business Acquisition [Line Items]
Fair value of replacement awards granted to acquired business employees		$ 274

Schedule of Acquisition-Date Fa

Schedule of Acquisition-Date Fair Value of Assets and Liabilities (Detail) - USD ($) $ in Thousands	Sep. 13, 2018	Oct. 10, 2017	Aug. 23, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Business Acquisition [Line Items]
Goodwill				$ 885,350		$ 589,862
Net working capital adjustment receivable				530	$ 887
Fair value of assumed equity awards attributable to pre-combination service				(2,594)
Net cash paid				366,856	$ 51,859
LevelUp
Business Acquisition [Line Items]
Accounts receivable	$ 6,201
Prepaid expenses and other current assets	1,396
Property and equipment	895
Intangible assets				36,441
Goodwill	295,488
Net deferred tax asset	32,267
Accounts payable and accrued expenses	(3,031)
Total purchase price net of cash acquired	369,657
Net working capital adjustment receivable	530
Cash acquired	(6,000)
Net cash paid	367,593
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			10,217
LevelUp | Diner acquisition
Business Acquisition [Line Items]
Intangible assets	3,912			3,912
LevelUp | Below-market lease intangible
Business Acquisition [Line Items]
Intangible assets	2,205			2,205
LevelUp | Developed technology
Business Acquisition [Line Items]
Intangible assets	$ 20,107			$ 20,107
Eat24
Business Acquisition [Line Items]
Cash		$ 40
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 plus cash acquired		281,756
Cash acquired		(40)
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]
Cash			$ 86
Accounts receivable			307
Goodwill			17,452
Accounts payable and accrued expenses			(5,237)
Total purchase price plus cash acquired			51,208
Cash acquired			(86)
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]
Cash		126
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 plus cash acquired		332,964
Cash acquired		(126)
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

Acquisitions - Valuation Method

Acquisitions - Valuation Methods for Intangible Assets Acquired (Detail)	9 Months Ended
	Sep. 30, 2018
Restaurant relationships | LevelUp
Business Acquisition [Line Items]
Valuation Method	With or without comparative business valuation
Restaurant relationships | Foodler
Business Acquisition [Line Items]
Valuation Method	Multi-period excess earnings
Restaurant relationships | Eat24
Business Acquisition [Line Items]
Valuation Method	Multi-period excess earnings
Diner acquisition | LevelUp
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Diner acquisition | Foodler
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Diner acquisition | Eat24
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Developed technology | LevelUp
Business Acquisition [Line Items]
Valuation Method	Multi-period excess earnings
Developed technology | Foodler
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Developed technology | Eat24
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Trademarks | Foodler
Business Acquisition [Line Items]
Valuation Method	Relief from royalty
Trademarks | Eat24
Business Acquisition [Line Items]
Valuation Method	Relief from royalty

Pro forma Summary of Operation

Pro forma Summary of Operation (Detail) - LevelUp,Eat24 and Foodler - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Revenues	$ 255,777	$ 190,833	$ 746,545	$ 562,364
Net income	$ 22,352	$ 5,084	$ 75,348	$ 15,869
Net income per share attributable to common shareholders:
Basic	$ 0.25	$ 0.06	$ 0.85	$ 0.18
Diluted	$ 0.24	$ 0.06	$ 0.82	$ 0.18

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	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Interest expense	$ 1,700	$ 200	$ 4,600	$ 600
Income tax (benefit) expense	(1,234)	4,432	2,721	19,043
LevelUp,Eat24 and Foodler | Pro Forma
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Depreciation and amortization	(186)	2,085	(248)	9,488
Transaction costs	(2,646)	(1,799)	(5,010)	846
Stock-based compensation	(458)	728	2,325	3,748
Interest expense	33	1,128	244	3,547
Other		1,571		4,401
Income tax (benefit) expense	$ 964	$ (1,546)	$ 796	$ (9,367)

Summary of Held-to-Maturity Mar

Summary of Held-to-Maturity Marketable Securities (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	$ 26,918	$ 64,834
Unrealized Losses	(124)	(143)
Estimated Fair Value	26,794	64,691
Commercial Paper | Cash and Cash Equivalents
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	10,231	39,979
Unrealized Losses	(12)	(43)
Estimated Fair Value	10,219	39,936
Commercial Paper | Short Term Investments
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	14,938	21,480
Unrealized Losses	(112)	(99)
Estimated Fair Value	14,826	21,381
Corporate Bonds | Cash and Cash Equivalents
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost		1,250
Estimated Fair Value		1,250
Corporate Bonds | Short Term Investments
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	1,749	2,125
Unrealized Losses		(1)
Estimated Fair Value	$ 1,749	$ 2,124

Marketable Securities - Additio

Marketable Securities - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Schedule Of Held To Maturity Securities [Line Items]
Marketable securities matured during the period and held in other interest-bearing accounts	$ 40,000,000		$ 40,000,000
Other-than-temporary impairment losses related to marketable securities	0	$ 0	0	$ 0
Net Interest (Income) Expense
Schedule Of Held To Maturity Securities [Line Items]
Interest income	$ 1,300,000	$ 500,000	$ 3,200,000	$ 1,500,000

Summary of Continuous Unrealize

Summary of Continuous Unrealized Loss on Marketable Securities (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule Of Held To Maturity Securities [Line Items]
Estimated Fair Value, Less Than 12 Months	$ 25,045	$ 64,691
Unrealized Loss, Less Than 12 Months	(124)	(143)
Estimated Fair Value, 12 Months or Greater	0	0
Unrealized Loss, 12 Months or Greater	0	0
Estimated Fair Value, Total	25,045	64,691
Unrealized Loss, Total	(124)	(143)
Commercial Paper
Schedule Of Held To Maturity Securities [Line Items]
Estimated Fair Value, Less Than 12 Months	25,045	61,317
Unrealized Loss, Less Than 12 Months	(124)	(142)
Estimated Fair Value, 12 Months or Greater	0	0
Unrealized Loss, 12 Months or Greater	0	0
Estimated Fair Value, Total	25,045	61,317
Unrealized Loss, Total	$ (124)	(142)
Corporate Bonds
Schedule Of Held To Maturity Securities [Line Items]
Estimated Fair Value, Less Than 12 Months		3,374
Unrealized Loss, Less Than 12 Months		(1)
Estimated Fair Value, 12 Months or Greater		0
Unrealized Loss, 12 Months or Greater		0
Estimated Fair Value, Total		3,374
Unrealized Loss, Total		$ (1)

Components of Acquired Intangib

Components of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	$ 548,693	$ 515,463
Amortizable intangible assets, Accumulated Amortization	(117,502)	(89,586)
Amortizable intangible assets, Net Carrying Value	431,191	425,877
Indefinite-lived trademarks	89,676	89,676
Total acquired intangible assets, Gross Carrying Amount	638,369	605,139
Total acquired intangible assets, Net Carrying Value	520,867	515,553
Restaurant relationships
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	467,797	457,580
Amortizable intangible assets, Accumulated Amortization	(96,321)	(76,852)
Amortizable intangible assets, Net Carrying Value	371,476	380,728
Diner acquisition
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	44,159	40,247
Amortizable intangible assets, Accumulated Amortization	(7,982)	(1,906)
Amortizable intangible assets, Net Carrying Value	36,177	38,341
Developed technology
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	28,630	8,523
Amortizable intangible assets, Accumulated Amortization	(8,591)	(6,418)
Amortizable intangible assets, Net Carrying Value	20,039	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	(21)
Amortizable intangible assets, Net Carrying Value	2,185
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	(2,362)	(4,008)
Amortizable intangible assets, Net Carrying Value	$ 1,314	$ 2,880

Goodwill and Acquired Intangi_3

Goodwill and Acquired Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Finite Lived Intangible Assets [Line Items]
Intangible assets amortization expense	$ 10,000	$ 6,400	$ 31,100	$ 16,800
LevelUp
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	36,441		36,441
Other intangible assets
Finite Lived Intangible Assets [Line Items]
Gross carrying amount of intangible assets no longer in use	3,200		3,200
Accumulated amortization of intangible assets no longer in use	$ 2,500		$ 2,500

Schedule of Carrying Amount of

Schedule of Carrying Amount of Goodwill (Detail) $ in Thousands	9 Months Ended
	Sep. 30, 2018USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, Begining Balance	$ 589,862
Goodwill, Acquisition	295,488
Goodwill, Ending Balance	885,350
Net Book Value, Beginning Balance	589,862
Net Book Value, Acquisition	295,488
Net Book Value, Ending Balance	$ 885,350

Components of Acquired Intang_2

Components of Acquired Intangibles Assets Added During the Period (Detail) - LevelUp - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 13, 2018
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 36,441
Developed technology
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 20,107	$ 20,107
Weighted-Average Amortization Period	6 years
Restaurant relationships
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 10,217	10,217
Weighted-Average Amortization Period	19 years
Diner acquisition
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 3,912	3,912
Weighted-Average Amortization Period	5 years
Below-market lease intangible
Finite Lived Intangible Assets [Line Items]
Acquired other intangible assets	$ 2,205	$ 2,205
Weighted-Average Amortization Period	5 years 9 months 18 days

Estimated Future Amortization o

Estimated Future Amortization of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]
The remainder of 2018	$ 10,117
2,019	38,485
2,020	37,315
2,021	37,304
2,022	35,334
Thereafter	272,636
Amortizable intangible assets, Net Carrying Value	$ 431,191	$ 425,877

Components of Property and Equi

Components of Property and Equipment (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Property Plant And Equipment [Line Items]
Property and equipment	$ 172,881	$ 116,780
Accumulated depreciation and amortization	(67,447)	(45,396)
Property and equipment, net	105,434	71,384
Developed software
Property Plant And Equipment [Line Items]
Property and equipment	78,332	52,041
Computer equipment
Property Plant And Equipment [Line Items]
Property and equipment	44,896	31,601
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment	31,809	23,400
Furniture and fixtures
Property Plant And Equipment [Line Items]
Property and equipment	8,704	6,857
Purchased Software and Digital Assets
Property Plant And Equipment [Line Items]
Property and equipment	3,581	$ 2,881
Construction in progress
Property Plant And Equipment [Line Items]
Property and equipment	$ 5,559

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 20,987	$ 12,613	$ 61,787	$ 33,067
Capitalized developed software costs	10,800	6,800	28,100	18,900
Property And Equipment Excluding Developed Software
Property Plant And Equipment [Line Items]
Depreciation and amortization	5,700	2,900	16,200	8,000
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	8,600		8,600
Accumulated amortization of property and equipment no longer in use	8,200		8,200
Developed software
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 5,300	$ 3,300	$ 14,500	$ 8,300

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) $ in Millions	Sep. 30, 2018USD ($)
Maximum | Merger Income Tax Consequences
Loss Contingencies [Line Items]
Indemnification related to business combination	$ 15

Schedule of Debt (Detail)

Schedule of Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Total debt	$ 296,875	$ 174,219
Less current portion	(6,250)	(3,906)
Less unamortized deferred debt issuance costs	(552)	(668)
Long-term debt	290,073	169,645
Term loan
Debt Instrument [Line Items]
Total debt	121,875	124,219
Revolving loan
Debt Instrument [Line Items]
Total debt	$ 175,000	$ 50,000

Debt - Additional Information (

Debt - Additional Information (Detail) - USD ($)	Oct. 10, 2017	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt		$ 296,875,000		$ 296,875,000		$ 174,219,000
Proceeds from borrowings				175,000,000
Repayment of borrowings				52,344,000
Unamortized Debt Issuance Expense		2,000,000		2,000,000
Interest expense		1,700,000	$ 200,000	4,600,000	$ 600,000
Revolving Loans
Debt Instrument [Line Items]
Long-term debt		175,000,000		175,000,000		50,000,000
Term Loans
Debt Instrument [Line Items]
Long-term debt		$ 121,875,000		121,875,000		$ 124,219,000
Credit Agreement
Debt Instrument [Line Items]
Credit facility, additional borrowing capacity	$ 150,000,000
Credit facility, expiration date	Oct. 9, 2022
Credit Agreement | Revolving Loans
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 225,000,000
Proceeds from borrowings				$ 175,000,000
Credit Agreement | Term Loans
Debt Instrument [Line Items]
Long-term debt	$ 125,000,000

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$ 14,200	$ 8,500	$ 36,445	$ 23,913
Total unrecognized stock-based compensation expense	$ 175,700		175,700
Unrecognized compensation expense recognition period	3 years
Stock-based compensation capitalized as website and software development cost	$ 2,600	1,200	$ 6,300	$ 3,300
Options, Granted			584,305	618,899
Aggregate intrinsic value of awards exercised	13,600	5,600	$ 36,100	$ 13,700
Aggregate intrinsic value	165,427		165,427
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$ 4,500	3,000	9,400	8,900
Unrecognized compensation expense recognition period	2 years 8 months 12 days
Unrecognized stock-based compensation expense	$ 40,100		40,100
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$ 9,700	5,500	27,000	15,000
Unrecognized compensation expense recognition period	3 years
Fair value of awards vested during the period	$ 26,300	5,700	76,300	19,900
Unrecognized compensation expense related to share based awards other than options	$ 135,600		$ 135,600
Non-vested restricted stock units or awards expected to vest	2,458,380		2,458,380
Weighted average grant date fair value	$ 61.60		$ 61.60
LevelUp
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Aggregate intrinsic value	$ 23,000		$ 23,000
LevelUp | Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Unrecognized stock-based compensation expense	14,500		14,500
Income Tax Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized excess tax benefits from stock-based compensation	7,600	2,200	21,500	5,700
Excess tax benefits from stock-based compensation	$ 7,600	$ 2,200	$ 21,500	$ 5,700

Assumptions Used to Determine F

Assumptions Used to Determine Fair Value of Stock Options Granted (Detail) - $ / shares		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted-average fair value options granted		$ 65.86	$ 15.19
Average risk-free interest rate		2.55%	1.65%
Expected stock price volatility	[1]	46.10%	48.70%
Dividend yield		0.00%	0.00%
Expected stock option life (years)	[2]	3 years 7 months 20 days	4 years
[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 the LevelUp assumed ISO awards was calculated based on their respective remaining vesting periods as of the acquisition date.

Stock Option Activity (Detail)

Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Options
Options, Beginning Balance	2,705,849
Options, Granted	584,305	618,899
Options, Forfeited	(115,035)
Options, Exercised	(487,317)
Options, Ending Balance	2,687,802		2,705,849
Options, Vested and expected to vest	2,682,769
Options, Exercisable	1,415,269
Weighted-Average Exercise Price
Weighted-Average Exercise Price, Beginning Balance	$ 25.53
Weighted-Average Exercise Price, Granted	68.74
Weighted-Average Exercise Price, Forfeited	34.21
Weighted-Average Exercise Price, Exercised	26.70
Weighted-Average Exercise Price, Ending Balance	34.34		$ 25.53
Weighted-Average Exercise Price, Vested and expected to vest	34.28
Weighted-Average Exercise Price, Exercisable	$ 21.73
Aggregate Intrinsic Value/Weighted-Average Exercise Term
Aggregate Intrinsic Value	$ 280,279		$ 125,197
Aggregate Intrinsic Value, Vested and expected to vest	279,912
Aggregate Intrinsic Value, Exercisable	$ 165,427
Weighted-Average Exercise Term, Outstanding Balance	7 years 1 month 9 days		7 years 3 months 10 days
Weighted-Average Exercise Term, Vested and expected to vest	7 years 1 month 6 days
Weighted-Average Exercise Term, Exercisable	6 years 1 month 6 days

Non-vested Restricted Stock Uni

Non-vested Restricted Stock Units (Detail) - Restricted Stock Units	9 Months Ended
	Sep. 30, 2018$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Beginning Balance | shares	2,454,801
Shares, Granted | shares	1,107,806
Shares, Forfeited | shares	(292,409)
Shares, Vested | shares	(796,579)
Shares, Ending Balance | shares	2,473,619
Weighted-Average Grant Date Fair Value, Beginning Balance | $ / shares	$ 37.56
Weighted-Average Grant Date Fair Value, Granted | $ / shares	94.35
Weighted-Average Grant Date Fair Value, Forfeited | $ / shares	51.67
Weighted-Average Grant Date Fair Value, Vested | $ / shares	35.94
Weighted-Average Grant Date Fair Value, Ending Balance | $ / shares	$ 61.84

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Tax Disclosure [Abstract]
Effective income tax rate	(5.70%)	25.40%	3.20%	29.50%
Excess tax benefits from stock-based compensation	$ 7.6	$ 2.2	$ 21.5	$ 5.7
Corporate income tax rate	21.00%	35.00%	21.00%	35.00%
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.

Stockholders' Equity - Addition

Stockholders' Equity - Additional Information (Detail) - USD ($)	Apr. 25, 2018	Sep. 30, 2018	Dec. 31, 2017	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		90,598,259	86,790,624
Common stock, shares outstanding		90,598,259	86,790,624
Treasury stock, shares		0	0
Preferred Stock, shares authorized		25,000,000	25,000,000
Preferred Stock, shares issued		0	0
Preferred Stock, shares outstanding		0	0
Common stock | Stock Repurchase Program
Class Of Stock [Line Items]
Stock repurchase program, announced date		Jan. 25, 2016
Common stock repurchased, Shares		0
Common stock | Maximum | Stock Repurchase Program
Class Of Stock [Line Items]
Authorized to repurchase of common stock				$ 100,000,000
Common stock | Accredited Investor
Class Of Stock [Line Items]
Aggregate purchase price		$ 200,000,000
Investment Agreement | Common stock | Accredited Investor
Class Of Stock [Line Items]
Shares issued and sold	2,820,464
Aggregate purchase price	$ 200,000,000

Equity and Changes in Equity Du

Equity and Changes in Equity During Period (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Class Of Stock [Line Items]
Balance at beginning of period				$ 1,117,816
Net income		$ 22,745	$ 12,988	83,631	$ 45,457
Currency translation		(92)	$ 299	(392)	$ 749
Stock-based compensation				42,755
Shares repurchased and retired to satisfy tax withholding upon vesting				(28,238)
Stock option exercises, net of withholdings and other				13,010
Stock-based compensation, assumed ISO awards				2,594
Balance at end of period		1,432,058		1,432,058
Common stock | Accredited Investor
Class Of Stock [Line Items]
Issuance of common stock				200,000
ASC Topic 606
Class Of Stock [Line Items]
Cumulative effect of change in accounting principle	[1]	$ 882		$ 882
[1]	See Note 2, Significant Accounting Policies, for additional details related to the impact of the adoption of ASC Topic 606 during the nine months ended September 30, 2018

Earnings Per Share Attributab_3

Earnings Per Share Attributable to Common Stockholders - Additional Information (Detail)	Apr. 25, 2018shares
Investment Agreement | Common stock | 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	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Schedule Of Earnings Per Share Basic And Diluted By Common Class [Line Items]
Net income attributable to common stockholders	$ 22,745	$ 12,988	$ 83,631	$ 45,457
Basic EPS, Shares
Weighted average number of shares outstanding, basic	90,494	86,449	89,027	86,162
Diluted EPS, shares
Weighted average number of shares outstanding, diluted	93,678	88,543	92,091	87,788
Basic EPS, per share amount
Net income attributable to common stockholders, per share amount	$ 0.25	$ 0.15	$ 0.94	$ 0.53
Diluted EPS, per share amount
Net income attributable to common stockholders plus assumed conversions, per share amount	$ 0.24	$ 0.15	$ 0.91	$ 0.52
Stock Options
Effect of Dilutive Securities, shares
Stock options and Restricted stock units, shares	1,704	1,105	1,649	951
Restricted Stock Units
Effect of Dilutive Securities, shares
Stock options and Restricted stock units, shares	1,480	989	1,415	675

Anti-dilutive Securities Exclud

Anti-dilutive Securities Excluded from Calculation of Diluted Net Income Per Share (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Stock Options
Anti-dilutive shares underlying stock-based awards:
Anti-dilutive shares underlying stock-based awards	251,582	685,671	251,582	685,671
Restricted Stock Units
Anti-dilutive shares underlying stock-based awards:
Anti-dilutive shares underlying stock-based awards	84,668	84,358	84,668	84,358

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	Sep. 30, 2018	Dec. 31, 2017
Fair Value | Level 2
Assets
Assets, fair value disclosure	$ 26,812	$ 64,784
Fair Value | Level 3
Liabilities
Long-term debt, including current maturities	303,001	175,700
Total liabilities	303,001	175,700
Carrying Value
Assets
Assets, fair value disclosure	26,936	64,927
Liabilities
Long-term debt, including current maturities	296,875	174,219
Total liabilities	296,875	174,219
Money Market Funds | Fair Value | Level 2
Assets
Assets, fair value disclosure	18	93
Money Market Funds | Carrying Value
Assets
Assets, fair value disclosure	18	93
Commercial Paper | Fair Value | Level 2
Assets
Assets, fair value disclosure	25,045	61,317
Commercial Paper | Carrying Value
Assets
Assets, fair value disclosure	25,169	61,459
Corporate Bonds | Fair Value | Level 2
Assets
Assets, fair value disclosure	1,749	3,374
Corporate Bonds | Carrying Value
Assets
Assets, fair value disclosure	$ 1,749	$ 3,375

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) $ in Millions	Sep. 25, 2018USD ($)
Tapingo and Certain Additinal Assets of OrderUp
Subsequent Event [Line Items]
Total aggregate consideration	$ 170