Document and Entity Information - shares	3 Months Ended
Document and Entity Information - shares	Mar. 31, 2019	May 03, 2019
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Trading Symbol	GRUB
Entity Registrant Name	GRUBHUB INC.
Entity Central Index Key	0001594109
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		91,177,437

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
CURRENT ASSETS:
Cash and cash equivalents	$ 189,694	$ 211,245
Short-term investments	14,704	14,084
Accounts receivable, less allowances for doubtful accounts	141,047	110,855
Income tax receivable	10,865	9,949
Prepaid expenses and other current assets	19,936	17,642
Total current assets	376,246	363,775
PROPERTY AND EQUIPMENT:
Property and equipment, net of depreciation and amortization	136,347	119,495
OTHER ASSETS:
Other assets	22,427	14,186
Operating lease right-of-use asset	78,674
Goodwill	1,005,381	1,019,239
Acquired intangible assets, net of amortization	534,989	549,013
Total other assets	1,641,471	1,582,438
TOTAL ASSETS	2,154,064	2,065,708
CURRENT LIABILITIES:
Restaurant food liability	140,469	127,344
Accounts payable	15,677	26,656
Accrued payroll	18,586	18,173
Taxes payable	1,179	422
Current portion of long-term debt	10,156	6,250
Current operating lease liability	13,436
Other accruals	50,164	44,323
Total current liabilities	249,667	223,168
LONG-TERM LIABILITIES:
Deferred taxes, non-current	31,411	46,383
Noncurrent operating lease liability	82,405
Long-term debt	328,193	335,548
Other accruals	751	18,270
Total long-term liabilities	442,760	400,201
Commitments and contingencies
STOCKHOLDERS’ EQUITY:
Preferred Stock, $0.0001 par value. Authorized: 25,000,000 shares as of March 31, 2019 and December 31, 2018; issued and outstanding: no shares as of March 31, 2019 and December 31, 2018.
Common stock, $0.0001 par value. Authorized: 500,000,000 shares at March 31, 2019 and December 31, 2018; issued and outstanding: 91,074,285 and 90,756,548 shares as of March 31, 2019 and December 31, 2018, respectively	9	9
Accumulated other comprehensive loss	(1,664)	(1,891)
Additional paid-in capital	1,107,047	1,094,866
Retained earnings	356,245	349,355
Total stockholders’ equity	1,461,637	1,442,339
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 2,154,064	$ 2,065,708

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Mar. 31, 2019	Dec. 31, 2018
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	91,074,285	90,756,548
Common stock, shares outstanding	91,074,285	90,756,548

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Revenues	$ 323,770	$ 232,570
Costs and expenses:
Operations and support	161,350	96,283
Sales and marketing	78,454	48,756
Technology (exclusive of amortization)	27,250	17,331
General and administrative	22,787	17,697
Depreciation and amortization	25,089	20,951
Total costs and expenses	314,930	201,018
Income from operations	8,840	31,552
Interest expense - net	2,812	1,022
Income before provision for income taxes	6,028	30,530
Income tax benefit	(862)	(236)
Net income attributable to common stockholders	$ 6,890	$ 30,766
Net income per share attributable to common stockholders:
Basic	$ 0.08	$ 0.35
Diluted	$ 0.07	$ 0.34
Weighted-average shares used to compute net income per share attributable to common stockholders:
Basic	90,951	87,085
Diluted	92,918	90,091

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 6,890	$ 30,766
OTHER COMPREHENSIVE INCOME
Foreign currency translation adjustments	227	356
COMPREHENSIVE INCOME	$ 7,117	$ 31,122

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References + Details

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 6,890	$ 30,766
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	6,193	5,050
Deferred taxes	(986)	(2,976)
Amortization of intangible assets and developed software	18,896	15,901
Stock-based compensation	16,478	10,231
Other	735	2,048
Change in assets and liabilities, net of the effects of business acquisitions:
Accounts receivable	(30,391)	(172)
Income taxes receivable	(916)	4,090
Prepaid expenses and other assets	(10,666)	(3,516)
Restaurant food liability	13,099	6,885
Accounts payable	(18,644)	601
Accrued payroll	411	(3,295)
Other accruals	12,845	5,887
Net cash provided by operating activities	13,944	71,500
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of investments	(12,160)	(10,537)
Proceeds from maturity of investments	11,636	18,166
Capitalized website and development costs	(10,692)	(6,262)
Purchases of property and equipment	(8,018)	(5,462)
Acquisition of other intangible assets	(5,379)
Acquisitions of businesses, net of cash acquired	127	737
Other cash flows from investing activities		16
Net cash used in investing activities	(24,486)	(3,342)
CASH FLOWS FROM FINANCING ACTIVITIES
Taxes paid related to net settlement of stock-based compensation awards	(9,966)	(11,485)
Proceeds from exercise of stock options	2,424	6,948
Repayments of borrowings under the credit facility	(2,031)	(25,781)
Payments for debt issuance costs	(1,647)
Net cash used in financing activities	(11,220)	(30,318)
Net change in cash, cash equivalents, and restricted cash	(21,762)	37,840
Effect of exchange rates on cash, cash equivalents and restricted cash	232	356
Cash, cash equivalents, and restricted cash at beginning of year	215,802	238,239
Cash, cash equivalents, and restricted cash at end of the period	194,272	276,435
SUPPLEMENTAL DISCLOSURE OF NON-CASH ITEMS
Cash paid for income taxes	351	227
Capitalized property, equipment and website and development costs in accounts payable at period end	7,851	3,992
RECONCILIATION OF CASH, CASH EQUIVALENTS, AND RESTRICTED CASH
Cash and cash equivalents	189,694	272,258
Restricted cash included in prepaid expenses and other current assets	$ 1,401	$ 1,500
Restricted Cash, Current, Asset, Statement of Financial Position [Extensible List]	us-gaap:PrepaidExpenseAndOtherAssetsCurrent	us-gaap:PrepaidExpenseAndOtherAssetsCurrent
Restricted cash included in other assets	$ 3,177	$ 2,677
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssetsNoncurrent	us-gaap:OtherAssetsNoncurrent
Total cash, cash equivalents, and restricted cash	$ 194,272	$ 276,435

Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings
Balance, beginning at Dec. 31, 2017	$ 1,117,816	$ 9	$ 849,043	$ (1,228)	$ 269,992
Balance, beginning (in shares) at Dec. 31, 2017		86,790,624
Net income	30,766				30,766
Cumulative effect adjustment upon adoption of ASU \| ASU 2016-09	882				882
Currency translation	356			356
Stock-based compensation	11,937		11,937
Stock option exercises and vesting of restricted stock units, net of withholdings and other	6,948		6,948
Stock option exercises and vesting of restricted stock units, net of withholdings and other (in shares)		643,888
Shares repurchased and retired to satisfy tax withholding upon vesting	(11,485)		(11,485)
Shares repurchased and retired to satisfy tax withholding upon vesting (in shares)		(147,471)
Balance, ending at Mar. 31, 2018	1,157,220	$ 9	856,443	(872)	301,640
Balance, ending (in shares) at Mar. 31, 2018		87,287,041
Balance, beginning at Dec. 31, 2018	1,442,339	$ 9	1,094,866	(1,891)	349,355
Balance, beginning (in shares) at Dec. 31, 2018		90,756,548
Net income	6,890				6,890
Currency translation	227			227
Stock-based compensation	19,723		19,723
Stock option exercises and vesting of restricted stock units, net of withholdings and other	2,424		2,424
Stock option exercises and vesting of restricted stock units, net of withholdings and other (in shares)		442,171
Shares repurchased and retired to satisfy tax withholding upon vesting	(9,966)		(9,966)
Shares repurchased and retired to satisfy tax withholding upon vesting (in shares)		(124,434)
Balance, ending at Mar. 31, 2019	$ 1,461,637	$ 9	$ 1,107,047	$ (1,664)	$ 356,245
Balance, ending (in shares) at Mar. 31, 2019		91,074,285

Organization

3 Months Ended

Mar. 31, 2019

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Organization

1. Organization

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

Significant Accounting Policies

3 Months Ended

Mar. 31, 2019

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, 2018 filed with the SEC on February 28, 2019 (the “2018 Form 10-K”). All significant intercompany transactions have been eliminated in consolidation. Operating results for the three months ended March 31, 2019 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2019.

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. Significant items subject to such estimates, judgments and assumptions include revenue recognition, website and internal-use software development costs, goodwill, recoverability of intangible assets with finite 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 three months ended March 31, 2019 related to leases. There have been no other material changes to the Company’s significant accounting policies described in the 2018 Form 10-K.

Recently Issued Accounting Pronouncements

In June 2016, the Financial Accounting Standards Board (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, and in subsequent updates, the FASB issued Accounting Standards Codification Topic 842, Leases (“ASC Topic 842”). Under ASC Topic 842, a lessee recognizes a liability to make lease payments and a right-of-use asset for all leases (with the exception of short-term leases) in the statement of financial position at the commencement date. ASC Topic 842 was effective for and adopted by the Company in the first quarter of 2019. The Company adopted ASC Topic 842 using the modified retrospective transition method applied to all existing leases beginning January 1, 2019. Periods prior to adoption were not adjusted and continue to be reported in accordance with historic accounting guidance under ASC Topic 840. The Company elected the optional practical expedient package which, among other things, includes retaining the historical classification of leases. The adoption of ASC Topic 842 resulted in the recognition on the condensed consolidated balance sheets as of January 1, 2019 of right-of-use assets of $81.2 million and lease liabilities for operating leases of $97.7 million, but did not result in a cumulative-effect adjustment on retained earnings. The operating lease right-of-use asset includes the impact upon adoption of ASC Topic 842 of the derecognition of lease incentives, deferred rent, below-market lease intangibles, cease-use liabilities and prepaid rent balances recognized in prepaid expenses and other current assets and current and noncurrent other accruals on the consolidated balance sheets as of December 31, 2018. The adoption of ASC Topic 842 did not have and is not expected to have a material impact to the Company's consolidated results of operations or cash flows. See Note 7, Commitments and Contingencies, for additional details.

Acquisitions

3 Months Ended

Mar. 31, 2019

Business Combinations [Abstract]

Acquisitions

3. Acquisitions

There were no acquisitions during the three months ended March 31, 2019.

2018 Acquisitions

On November 7, 2018, the Company acquired all of the issued and outstanding shares of Tapingo Ltd. (“Tapingo”) for approximately $152.1 million, including $151.7 million of cash paid (net of cash acquired of $1.5 million) and $0.4 million of other non-cash consideration. Tapingo is a leading platform for campus food ordering with direct integration into college meal plans and point of sale systems. The acquisition of Tapingo has enhanced the Company’s diner network on college campuses.

On September 13, 2018, the Company acquired SCVNGR, Inc. d/b/a LevelUp (“LevelUp”) for approximately $369.4 million, including $366.8 million of cash paid (net of cash acquired of $6.0 million) and $2.6 million of other non-cash consideration. LevelUp is a leading provider of mobile diner engagement and payment solutions for national and regional restaurant brands. The acquisition of LevelUp has simplified the Company’s integrations with restaurants’ systems, increased diner engagement and accelerated product development.

The Company assumed Tapingo and LevelUp employees’ unvested incentive stock option (“ISO”) awards as of the respective closing dates. Approximately $0.4 million and $2.6 million of the fair value of the assumed ISO awards granted to acquired Tapingo and LevelUp employees, respectively, was attributable to the pre-combination services of the awardees and was included in the respective purchase prices. These amounts are reflected within goodwill in the respective purchase price allocations. As of the respective acquisition dates, aggregate post-combination expense of approximately $21.4 million was expected to be recognized related to the combined assumed ISO awards over the remaining post-combination service period.

The results of operations of Tapingo and LevelUp have been included in the Company’s financial statements since November 7, 2018 and September 13, 2018, respectively.

The excess of the consideration transferred in the acquisitions over the amounts assigned to the fair value of the assets was recorded as goodwill, which represents the value of LevelUp’s technology team, the ability to simplify integrations with restaurants on the Company’s platform, and the expanded breadth and depth of the Company’s network of diners and campus relationships. The total goodwill related to the acquisitions of Tapingo and LevelUp of $415.5 million is not deductible for income tax purposes.

The assets acquired and liabilities assumed of Tapingo and LevelUp were recorded at their estimated fair values as of the closing dates of November 7, 2018 and September 13, 2018, respectively. The purchase price allocations for Tapingo and LevelUp are subject to change within the measurement period as certain significant fair value estimates are subject to management review and approval. See Note 5, Goodwill and Acquired Intangible Assets, for a description of changes to the purchase price allocations for Tapingo and LevelUp during the three months ended March 31, 2019.

The following table summarizes the preliminary purchase price allocation acquisition-date fair values of the asset and liabilities acquired in connection with the Tapingo and LevelUp acquisitions:

	Tapingo			LevelUp			Total
	(in thousands)
Accounts receivable	$	3,101		$	6,201		$	9,302
Prepaid expenses and other current assets		843			1,396			2,239
Property and equipment		—			895			895
Other assets		163			—			163
Restaurant relationships		11,279			10,217			21,496
Diner acquisition		—			3,912			3,912
Below-market lease intangible		—			2,205			2,205
Developed technology		9,755			20,107			29,862
Goodwill		119,321			296,198			415,519
Net deferred tax asset		12,074			31,545			43,619
Accounts payable and accrued expenses		(4,478	)		(3,249	)		(7,727	)
Total purchase price net of cash acquired	$	152,058		$	369,427		$	521,485
Fair value of assumed ISOs attributable to pre-combination service		(372	)		(2,594	)		(2,966	)
Net cash paid	$	151,686		$	366,833		$	518,519

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 and developed technology as follows:

	Valuation Method
	Tapingo	LevelUp
Restaurant relationships	Multi-period excess earnings	With or without comparative business valuation
Diner acquisition	n/a	Cost to recreate
Developed technology	Cost to recreate	Multi-period excess earnings

The fair value of the LevelUp below-market lease was measured based on the present value of the difference between the contractual amounts to be paid pursuant to the lease and an estimate of current fair market lease rates measured over the non-cancelable remaining term of the lease. As of January 1, 2019, the below-market lease intangible asset was derecognized from acquired intangible assets resulting in a corresponding adjustment to the opening balance of operating lease right-of-use assets on the condensed consolidated balance sheets upon adoption of ASC Topic 842.

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 March 31, 2019 and 2018 of $0.5 million and $1.3 million, respectively.

Pro Forma (unaudited)

The following unaudited pro forma information presents a summary of the operating results of the Company for the three months ended March 31, 2018 as if the acquisitions of Tapingo and LevelUp had occurred as of January 1 of the year prior to acquisition:

	Three Months Ended March 31, 2018
	(in thousands, except per share data)
Revenues	$	243,347
Net income		21,621
Net income per share attributable to common shareholders:
Basic	$	0.25
Diluted	$	0.24

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 assumed equity awards and interest expense for transaction financings, as well as the pro forma tax impact of such adjustments for the three months ended March 31, 2018 were as follows:

	Three Months Ended March 31, 2018
	(in thousands)
Depreciation and amortization	$	1,626
Transaction costs		(1,232	)
Stock-based compensation		1,872
Interest expense		525
Income tax benefit		(826	)

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 period presented and should not be taken as indicative of the Company’s future consolidated results of operations or financial condition.

Marketable Securities

3 Months Ended

Mar. 31, 2019

Investments Debt And Equity Securities [Abstract]

Marketable Securities

4. Marketable Securities

The amortized cost, unrealized gains and losses and estimated fair value of the Company’s held-to-maturity marketable securities as of March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
	(in thousands)
Cash and cash equivalents
Commercial paper	$	11,451	$	—	$	(20	)	$	11,431
Corporate bonds		1,000		—		—			1,000
Short-term investments
Commercial paper		14,704		—		(78	)		14,626
Total	$	27,155	$	—	$	(98	)	$	27,057

	December 31, 2018
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
	(in thousands)
Cash and cash equivalents
Commercial paper	$	12,097	$	—	$	(21	)	$	12,076
Corporate bonds		870		—		—			870
Short-term investments
Commercial paper		13,334		—		(88	)		13,246
Corporate bonds		750		—		—			750
Total	$	27,051	$	—	$	(109	)	$	26,942

All of the Company’s marketable securities were classified as held-to-maturity investments and have maturities within one year of March 31, 2019.

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 March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019
	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	$	26,057	$	(98	)	$	—	$	—	$	26,057	$	(98	)
Total	$	26,057	$	(98	)	$	—	$	—	$	26,057	$	(98	)

	December 31, 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	$	25,322	$	(109	)	$	—	$	—	$	25,322	$	(109	)
Corporate bonds		750		—			—		—		750		—
Total	$	26,072	$	(109	)	$	—	$	—	$	26,072	$	(109	)

The Company recognized interest income during the three months ended March 31, 2019 and 2018 of $0.7 million and $0.6 million, respectively, within net interest expense on the condensed consolidated statements of operations. During the three months ended March 31, 2019 and 2018, 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 13, Fair Value Measurement, for further details).

Goodwill and Acquired Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Acquired Intangible Assets

5. Goodwill and Acquired Intangible Assets

The components of acquired intangible assets as of March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019							December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Gross Carrying Amount		Accumulated Amortization			Net Carrying Value
	(in thousands)
Restaurant relationships	$	494,278	$	(110,647	)	$	383,631	$	494,278	$	(103,457	)	$	390,821
Diner acquisition		47,541		(12,683	)		34,858		47,541		(10,306	)		37,235
Developed technology		38,385		(12,304	)		26,081		38,385		(10,247	)		28,138
Trademarks		2,225		(2,225	)		—		2,225		(2,225	)		—
Below-market lease intangible		—		—			—		2,206		(124	)		2,082
Other		3,373		(2,630	)		743		3,676		(2,615	)		1,061
Total amortizable intangible assets		585,802		(140,489	)		445,313		588,311		(128,974	)		459,337
Indefinite-lived trademarks		89,676		—			89,676		89,676		—			89,676
Total acquired intangible assets	$	675,478	$	(140,489	)	$	534,989	$	677,987	$	(128,974	)	$	549,013

Upon adoption of ASC Topic 842, the acquired below-market lease intangible was derecognized resulting in a corresponding adjustment to the operating lease right-of-use asset within the condensed consolidated balance sheets as of January 1, 2019. Amortization of the acquired below-market lease intangible was recognized as rent expense within the condensed consolidated statements of operations. See Note 7, Commitments and Contingencies, for further details.

Amortization expense for acquired intangible assets recognized within depreciation and amortization on the condensed consolidated statements of operations was $11.9 million and $11.5 million for the three months ended March 31, 2019 and 2018, respectively.

The change in the carrying amount of goodwill during the three months ended March 31, 2019 related to changes in the fair value of net deferred tax assets for the purchase price allocations of the Tapingo and LevelUp acquisitions during the measurement period were as follows:

	Goodwill			Accumulated Impairment Losses		Net Book Value
	(in thousands)
Balance as of December 31, 2018	$	1,019,239		$	—	$	1,019,239
Acquisitions		(13,858	)		—		(13,858	)
Balance as of March 31, 2019	$	1,005,381		$	—	$	1,005,381

Estimated future amortization expense of acquired intangible assets as of March 31, 2019 was as follows:

	(in thousands)
The remainder of 2019	$	35,105
2020		44,381
2021		38,745
2022		36,776
2023		30,281
Thereafter		260,025
Total	$	445,313

Property and Equipment

3 Months Ended

Mar. 31, 2019

Property Plant And Equipment [Abstract]

Property and Equipment

6. Property and Equipment

The components of the Company’s property and equipment as of March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019			December 31, 2018
	(in thousands)
Developed software	$	104,818		$	90,302
Computer equipment		55,838			50,767
Leasehold improvements		41,827			39,550
Furniture and fixtures		12,408			10,801
Purchased software and digital assets		6,467			4,696
Construction in progress		6,446			1,976
Property and equipment		227,804			198,092
Accumulated depreciation and amortization		(91,457	)		(78,597	)
Property and equipment, net	$	136,347		$	119,495

The Company recorded depreciation and amortization expense for property and equipment other than developed software of $6.2 million and $5.1 million for the three months ended March 31, 2019 and 2018, respectively.

The Company capitalized developed software costs of $14.5 million and $8.2 million for the three months ended March 31, 2019 and 2018, respectively. Amortization expense for developed software costs, recognized in depreciation and amortization in the condensed consolidated statements of operations, for the three months ended March 31, 2019 and 2018 was $7.0 million and $4.4 million, respectively.

Commitments and Contingencies

3 Months Ended

Mar. 31, 2019

Commitments And Contingencies Disclosure [Abstract]

Commitments and Contingencies

7. Commitments and Contingencies

Leases

As of March 31, 2019, the Company had operating lease agreements for its office facilities in various locations throughout the U.S, as well as in the U.K. and Israel, which expire at various dates through September 2029. The terms of the lease agreements provide for fixed rental payments on a graduated basis. For its primary operating leases, the Company can, after the initial lease term, renew its leases under right of first offer terms at fair value at the time of renewal for a period of five years. The Company's lease term includes options to extend or terminate the lease when it is reasonably certain that it will exercise that option.

The Company determines if an arrangement is a lease at inception of a contract. Leases with an initial term of 12 months or less are not recorded on the balance sheet. Non-lease components associated with lease components in the Company’s lease contracts are treated as a single lease component. As of March 31, 2019, the Company recognized on its condensed consolidated balance sheets operating lease right-of-use assets of $78.7 million that represent the Company's right to use an underlying asset during the lease term and current and noncurrent operating lease liabilities of $13.4 million and $82.4 million, respectively, that represent the Company's obligation to make lease payments. Operating lease right-of-use assets and liabilities commencing after January 1, 2019 are recognized at commencement date based on the present value of lease payments over the lease term. Because the rate implicit in each lease is not readily determinable, the Company uses its incremental borrowing rate to determine the present value of the lease payments. To determine the incremental borrowing rate, the Company uses information including the risk-free interest rate for the remaining lease term, the Company’s implied credit rating and interest rates of similar debt instruments of entities with comparable credit ratings. The Company recognizes rent expense on a straight-line basis over the lease term, which is allocated on a headcount basis to operations and support, sales and marketing, technology and general and administrative costs and expenses in the condensed consolidated statements of operations.

The components of lease costs, which consists of rent expense for leased office space, during the three months ended March 31, 2019 were as follows:

	Three Months Ended March 31, 2019
	(in thousands)
Fixed operating lease cost	$	3,808
Short-term lease cost		450
Sublease income		(47	)
Total lease cost	$	4,211

Supplemental cash flow information related to the Company’s operating leases as well as the weighted-average lease term and discount rate as of March 31, 2019, were as follows:

	Three Months Ended March 31, 2019
Cash paid for operating lease liabilities (in thousands)	$	3,169
Weighted-average remaining lease term (years)		8.9
Weighted-average discount rate		5.2	%

Future minimum lease payments under the Company’s operating lease agreements as of March 31, 2019 were as follows:

	(in thousands)
The remainder of 2019	$	10,459
2020		14,878
2021		14,244
2022		12,218
2023		12,218
Thereafter		57,572
Total future lease payments		121,589
Less interest		(25,748	)
Present value of lease liabilities	$	95,841

The table above does not reflect the Company’s option to exercise early termination rights or the payment of related early termination fees. Additionally, as of March 31, 2019, the Company had future obligations for office facilities of approximately $27 million that have not yet commenced, and as such, have not been recognized on the Company's condensed consolidated balance sheets or included in the table above. This operating lease, with an eleven year term, is expected to commence in 2019.

As previously reported in the 2018 Form 10-K under ASC Topic 840, future minimum lease payments under the Company’s operating lease agreements that had initial or remaining non-cancelable lease terms in excess of one year as of December 31, 2018 were as follows:

	(in thousands)
2019	$	13,009
2020		14,874
2021		14,243
2022		12,219
2023		12,220
Thereafter		57,503
Total	$	124,068

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, Case No. 3:11-cv-1810. Ameranth subsequently initiated additional actions for infringement of a related patent, including separate actions against Grubhub Holdings Inc., Case No. 3:12-cv-739, and Seamless North America, LLC, Case No. 3:12-cv-737, which were consolidated along with approximately 40 other cases Ameranth filed in the same district.

In September 2018, the district court granted summary judgment (on another defendant’s motion) of unpatentability on the sole remaining patent and vacated the December 3, 2018 jury trial date for the claims against Grubhub Holdings Inc. and Seamless North America, LLC. In October 2018, the district court entered final judgment on all claims in the case in which summary judgment was granted, and then stayed the remaining cases (including the cases against Grubhub and Seamless). Ameranth then appealed this decision to the U.S. Court of Appeals for the Federal Circuit. 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 March 31, 2019, as it does not believe a material loss is probable. It is a reasonable possibility that a loss may be incurred; however, the possible range of loss is not estimable given the status of the case and the uncertainty as to whether the claims at issue are with or without merit, will be settled out of court, or will be determined in the Company’s favor, whether the Company may be required to expend significant management time and financial resources on the defense of such claims, and whether the Company will be able to recover any losses under its insurance policies.

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. A decision was issued on February 8, 2018, and the court ruled in favor of the Company, finding that plaintiff was properly classified as an independent contractor. In March 2018, the plaintiff appealed this decision to the U.S. Court of Appeals for the Ninth Circuit. The Company does not believe any of the foregoing claims will have a material impact on its consolidated financial statements. However, there is no assurance that any claim will not be combined into a collective or class action.

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

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Debt

8. Debt

The following table summarizes the carrying value of the Company’s debt as of March 31, 2019 and December 31, 2018:

	March 31, 2019			December 31, 2018
	(in thousands)
Term loan	$	322,968		$	120,312
Revolving loan		17,313			222,000
Total debt		340,281			342,312
Less current portion		(10,156	)		(6,250	)
Less unamortized deferred debt issuance costs		(1,932	)		(514	)
Long-term debt	$	328,193		$	335,548

On February 6, 2019, the Company entered into an amended and restated credit agreement (the “Credit Agreement”) which provides, among other things, for aggregate revolving loans up to $225 million and term loans in an aggregate principal amount of $325 million. In addition, the Company may incur up to $250 million of incremental revolving or term loans pursuant to the terms and conditions of the Credit Agreement. The credit facility under the Credit Agreement will be available to the Company until February 5, 2024. The Credit Agreement replaced the Company’s prior $350 million credit facility, which was due to expire on October 9, 2022. There have been no changes in the terms of the Credit Agreement as described in Part II, Item 8, Note 16, Subsequent Events, to the Company’s 2018 Form 10-K.

During the three months ended March 31, 2019, the Company made principal payments of $2.0 million from cash on hand. As of March 31, 2019, outstanding borrowings under the Credit Agreement were $340.3 million. The fair value of the Company’s outstanding debt approximates its carrying value as of March 31, 2019 (see Note 13, Fair Value Measurement, for additional details). The Company was in compliance with the covenants of the Credit Agreement as of March 31, 2019. Additional capacity under the Credit Agreement may be used for general corporate purposes, including funding working capital and future acquisitions.

As of March 31, 2019 and December 31, 2018, total unamortized debt issuance costs of $3.3 million and $1.9 million, respectively, were recorded as other assets and as a reduction of long-term debt on the condensed consolidated balance sheets in proportion to the borrowing capacities of the revolving and term loans.

Interest expense includes interest on outstanding borrowings, amortization of debt issuance costs and commitment fees on the undrawn portion available under the credit facility. The Company recognized interest expense of $3.5 million and $1.6 million during the three months ended March 31, 2019 and 2018, respectively.

Stock-Based Compensation

3 Months Ended

Mar. 31, 2019

Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]

Stock-Based Compensation

9. Stock-Based Compensation

The Company has granted non-qualified and incentive stock options, restricted stock units and restricted stock awards under its incentive plans. The Company recognizes compensation expense based on estimated grant date fair values for all stock-based awards issued to employees and directors, including stock options, restricted stock awards and restricted stock units.

Stock-based Compensation Expense

The total stock-based compensation expense related to all stock-based awards was $16.5 million and $10.2 million during the three months ended March 31, 2019 and 2018, respectively. As of March 31, 2019, $244.7 million of total unrecognized stock-based compensation expense is expected to be recognized over a weighted-average period of 3.2 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 March 31, 2019 and 2018, the Company recognized excess tax benefits from stock-based compensation of $2.3 million and $8.2 million, respectively, within income tax benefit 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 $3.2 million and $1.7 million during the three months ended March 31, 2019 and 2018, respectively.

Stock Options

The Company granted 301,873 and 332,723 stock options under the Grubhub Inc. 2015 Long-Term Incentive Plan during the three months ended March 31, 2019 and 2018, 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. Expected volatility is based on the historical and implied volatilities of the Company’s own common stock. The Company uses historical data to estimate option exercises and employee terminations within the valuation model. Separate groups of employees that have similar historical exercise behavior are considered separately for valuation purposes. The expected term calculation for option awards considers a combination of the Company’s historical and estimated future exercise behavior. The risk-free rate for the period within the contractual life of the option is based on the U.S. Treasury yield curve in effect at the time of grant.

The assumptions used to determine the fair value of the stock options granted during the three months ended March 31, 2019 and 2018 were as follows:

	Three Months Ended March 31,
	2019			2018
Weighted-average fair value options granted	$	31.27		$	33.24
Average risk-free interest rate		2.44	%		2.38	%
Expected stock price volatility		48.1	%		45.7	%
Dividend yield	None			None
Expected stock option life (years)		4.00			4.00

Stock option awards as of December 31, 2018 and March 31, 2019, and changes during the three months ended March 31, 2019, were as follows:

	Options			Weighted-Average Exercise Price		Aggregate Intrinsic Value (thousands)		Weighted-Average Exercise Term (years)
Outstanding at December 31, 2018		2,650,839		$	33.13	$	120,977		6.87
Granted		301,873			78.08
Forfeited		(15,978	)		98.64
Exercised		(105,881	)		22.90
Outstanding at March 31, 2019		2,830,853			37.93		99,134		6.97
Vested and expected to vest at March 31, 2019		2,825,796			37.87		99,115		6.96
Exercisable at March 31, 2019		1,701,724		$	25.44	$	76,536		5.96

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. This amount will change in future periods based on the fair value of the Company’s stock and the number of options outstanding. The aggregate intrinsic value of awards exercised during the three months ended March 31, 2019 and 2018 was $6.1 million and $14.6 million, respectively.

The Company recorded compensation expense for stock options of $4.0 million and $2.4 million for the three months ended March 31, 2019 and 2018, respectively. As of March 31, 2019, total unrecognized compensation cost, adjusted for estimated forfeitures, related to non-vested stock options was $38.5 million and is expected to be recognized over a weighted-average period of 2.7 years.

Restricted Stock Units

Non-vested restricted stock units as of December 31, 2018 and March 31, 2019, and changes during the three months ended March 31, 2019 were as follows:

	Restricted Stock Units
	Shares			Weighted-Average Grant Date Fair Value
Outstanding at December 31, 2018		2,328,857		$	67.33
Granted		1,323,526			77.95
Forfeited		(175,710	)		68.60
Vested		(336,290	)		63.84
Cancelled		(52,357	)		85.39
Outstanding at March 31, 2019		3,088,026		$	72.17

Compensation expense related to restricted stock units was $12.5 million and $7.8 million during the three months ended March 31, 2019 and 2018, respectively. The aggregate fair value as of the vest date of restricted stock units that vested during the three months ended March 31, 2019 and 2018 was $26.9 million and $30.3 million, respectively. As of March 31, 2019, $206.2 million of total unrecognized compensation cost, adjusted for estimated forfeitures, related to 3,052,839 non-vested restricted stock units expected to vest with weighted-average grant date fair values of $72.06 is expected to be recognized over a weighted-average period of 3.2 years. The fair value of these awards was determined based on the Company’s stock price at the grant date and assumes no expected dividend payments through the vesting period.

Income Taxes

3 Months Ended

Mar. 31, 2019

Income Tax Disclosure [Abstract]

Income Taxes

10. Income Taxes

The Company’s effective tax rate was negative 14.3% and negative 0.8% during the three months ended March 31, 2019 and 2018, respectively. The income tax benefit for the three months ended March 31, 2019 and 2018, included the net impact of excess tax benefits for stock-based compensation of $2.3 million and $8.2 million, respectively (see Note 9, Stock-based Compensation, for additional details).

The Company is currently under examination for Tapingo’s federal income tax return for the tax year ended December 31, 2016. The Company does not believe, but cannot predict with certainty, that there will be any additional tax liabilities, penalties or interest as a result of the audit.

Stockholders' Equity

3 Months Ended

Mar. 31, 2019

Equity [Abstract]

Stockholders' Equity

11. Stockholders’ Equity

As of March 31, 2019 and December 31, 2018, the Company was authorized to issue two classes of stock: common stock and preferred stock.

Common Stock

Each holder of common stock has one vote per share of common stock held on all matters that are submitted for stockholder vote. At March 31, 2019 and December 31, 2018, there were 500,000,000 shares of common stock authorized. At March 31, 2019 and December 31, 2018, there were 91,074,285 and 90,756,548 shares issued and outstanding, respectively. The Company did not hold any shares as treasury shares as of March 31, 2019 or December 31, 2018.

On April 25, 2018, the Company issued and sold 2,820,464 shares of the Company’s common stock to Yum Restaurant Services Group, LLC (the “Investor”), a wholly owned subsidiary of Yum! Brands, Inc., for an aggregate purchase price of $200 million pursuant to an investment agreement dated February 7, 2018, by and between the Company and the Investor. The Company has used and expects to use the proceeds for general corporate purposes.

On January 22, 2016, the Company’s Board of Directors approved a program that authorizes the repurchase of up to $100 million of the Company’s common stock exclusive of any fees, commissions or other expenses relating to such repurchases through open market purchases or privately negotiated transactions at the prevailing market price at the time of purchase. The repurchase program was announced on January 25, 2016. Repurchased stock may be retired or held as treasury shares. The repurchase authorizations do not obligate the Company to acquire any particular amount of common stock or adopt any particular method of repurchase and may be modified, suspended or terminated at any time at management’s discretion. Repurchased and retired shares will result in an immediate reduction of the outstanding shares used to calculate the weighted-average common shares outstanding for basic and diluted net income per share at the time of the transaction. During the three months ended March 31, 2019, the Company did not repurchase any shares of its common stock.

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 March 31, 2019 or December 31, 2018.

Earnings Per Share Attributable to Common Stockholders

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Earnings Per Share Attributable to Common Stockholders

12. 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 following table presents the calculation of basic and diluted net income per share attributable to common stockholders for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
	2019		2018
	(in thousands, except per share data)
Basic earnings per share:
Net income attributable to common stockholders (numerator)	$	6,890	$	30,766
Shares used in computation (denominator)
Weighted-average common shares outstanding		90,951		87,085
Basic earnings per share	$	0.08	$	0.35
Diluted earnings per share:
Net income attributable to common stockholders (numerator)	$	6,890	$	30,766
Shares used in computation (denominator)
Weighted-average common shares outstanding		90,951		87,085
Effect of dilutive securities:
Stock options		1,308		1,621
Restricted stock units		659		1,385
Weighted-average diluted shares		92,918		90,091
Diluted earnings per share	$	0.07	$	0.34

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 months ended March 31, 2019 and 2018 were as follows:

	Three Months Ended March 31,
	2019		2018
	(in thousands)
Anti-dilutive shares underlying stock-based awards:
Stock options		845		333
Restricted stock units		572		60

Fair Value Measurement

3 Months Ended

Mar. 31, 2019

Fair Value Disclosures [Abstract]

Fair Value Measurement

13. 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 March 31, 2019 and December 31, 2018:

	March 31, 2019						December 31, 2018
	Level 2		Level 3		Carrying Value		Level 2		Level 3		Carrying Value
	(in thousands)
Assets
Money market funds	$	135	$	—	$	135	$	61	$	—	$	61
Commercial paper		26,057		—		26,155		25,322		—		25,431
Corporate bonds		1,000		—		1,000		1,620		—		1,620
Total assets	$	27,192	$	—	$	27,290	$	27,003	$	—	$	27,112
Liabilities
Long-term debt, including current maturities	$	—	$	340,635	$	340,281	$	—	$	342,745	$	342,312
Total liabilities	$	—	$	340,635	$	340,281	$	—	$	342,745	$	342,312

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 3, Acquisitions, for further discussion of the fair value of assets and liabilities associated with acquisitions.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Significant Accounting Policies (Policies)	3 Months Ended
Significant Accounting Policies (Policies)	Mar. 31, 2019
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, 2018 filed with the SEC on February 28, 2019 (the “2018 Form 10-K”). All significant intercompany transactions have been eliminated in consolidation. Operating results for the three months ended March 31, 2019 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2019.
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. Significant items subject to such estimates, judgments and assumptions include revenue recognition, website and internal-use software development costs, goodwill, recoverability of intangible assets with finite 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 three months ended March 31, 2019 related to leases. There have been no other material changes to the Company’s significant accounting policies described in the 2018 Form 10-K.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In June 2016, the Financial Accounting Standards Board (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, and in subsequent updates, the FASB issued Accounting Standards Codification Topic 842, Leases (“ASC Topic 842”). Under ASC Topic 842, a lessee recognizes a liability to make lease payments and a right-of-use asset for all leases (with the exception of short-term leases) in the statement of financial position at the commencement date. ASC Topic 842 was effective for and adopted by the Company in the first quarter of 2019. The Company adopted ASC Topic 842 using the modified retrospective transition method applied to all existing leases beginning January 1, 2019. Periods prior to adoption were not adjusted and continue to be reported in accordance with historic accounting guidance under ASC Topic 840. The Company elected the optional practical expedient package which, among other things, includes retaining the historical classification of leases. The adoption of ASC Topic 842 resulted in the recognition on the condensed consolidated balance sheets as of January 1, 2019 of right-of-use assets of $81.2 million and lease liabilities for operating leases of $97.7 million, but did not result in a cumulative-effect adjustment on retained earnings. The operating lease right-of-use asset includes the impact upon adoption of ASC Topic 842 of the derecognition of lease incentives, deferred rent, below-market lease intangibles, cease-use liabilities and prepaid rent balances recognized in prepaid expenses and other current assets and current and noncurrent other accruals on the consolidated balance sheets as of December 31, 2018. The adoption of ASC Topic 842 did not have and is not expected to have a material impact to the Company's consolidated results of operations or cash flows. See Note 7, Commitments and Contingencies, for additional details.
Leases	The Company determines if an arrangement is a lease at inception of a contract. Leases with an initial term of 12 months or less are not recorded on the balance sheet. Non-lease components associated with lease components in the Company’s lease contracts are treated as a single lease component. As of March 31, 2019, the Company recognized on its condensed consolidated balance sheets operating lease right-of-use assets of $78.7 million that represent the Company's right to use an underlying asset during the lease term and current and noncurrent operating lease liabilities of $13.4 million and $82.4 million, respectively, that represent the Company's obligation to make lease payments. Operating lease right-of-use assets and liabilities commencing after January 1, 2019 are recognized at commencement date based on the present value of lease payments over the lease term. Because the rate implicit in each lease is not readily determinable, the Company uses its incremental borrowing rate to determine the present value of the lease payments. To determine the incremental borrowing rate, the Company uses information including the risk-free interest rate for the remaining lease term, the Company’s implied credit rating and interest rates of similar debt instruments of entities with comparable credit ratings. The Company recognizes rent expense on a straight-line basis over the lease term, which is allocated on a headcount basis to operations and support, sales and marketing, technology and general and administrative costs and expenses in the condensed consolidated statements of operations.

Acquisitions (Tables) - Tapingo and LevelUp

3 Months Ended

Mar. 31, 2019

Business Acquisition [Line Items]

Schedule of Acquisition Date Fair Value of Assets and Liabilities

The following table summarizes the preliminary purchase price allocation acquisition-date fair values of the asset and liabilities acquired in connection with the Tapingo and LevelUp acquisitions:

	Tapingo			LevelUp			Total
	(in thousands)
Accounts receivable	$	3,101		$	6,201		$	9,302
Prepaid expenses and other current assets		843			1,396			2,239
Property and equipment		—			895			895
Other assets		163			—			163
Restaurant relationships		11,279			10,217			21,496
Diner acquisition		—			3,912			3,912
Below-market lease intangible		—			2,205			2,205
Developed technology		9,755			20,107			29,862
Goodwill		119,321			296,198			415,519
Net deferred tax asset		12,074			31,545			43,619
Accounts payable and accrued expenses		(4,478	)		(3,249	)		(7,727	)
Total purchase price net of cash acquired	$	152,058		$	369,427		$	521,485
Fair value of assumed ISOs attributable to pre-combination service		(372	)		(2,594	)		(2,966	)
Net cash paid	$	151,686		$	366,833		$	518,519

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 and developed technology as follows:

	Valuation Method
	Tapingo	LevelUp
Restaurant relationships	Multi-period excess earnings	With or without comparative business valuation
Diner acquisition	n/a	Cost to recreate
Developed technology	Cost to recreate	Multi-period excess earnings

Pro Forma Summary of Operation

The following unaudited pro forma information presents a summary of the operating results of the Company for the three months ended March 31, 2018 as if the acquisitions of Tapingo and LevelUp had occurred as of January 1 of the year prior to acquisition:

	Three Months Ended March 31, 2018
	(in thousands, except per share data)
Revenues	$	243,347
Net income		21,621
Net income per share attributable to common shareholders:
Basic	$	0.25
Diluted	$	0.24

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 assumed equity awards and interest expense for transaction financings, as well as the pro forma tax impact of such adjustments for the three months ended March 31, 2018 were as follows:

	Three Months Ended March 31, 2018
	(in thousands)
Depreciation and amortization	$	1,626
Transaction costs		(1,232	)
Stock-based compensation		1,872
Interest expense		525
Income tax benefit		(826	)

Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
	(in thousands)
Cash and cash equivalents
Commercial paper	$	11,451	$	—	$	(20	)	$	11,431
Corporate bonds		1,000		—		—			1,000
Short-term investments
Commercial paper		14,704		—		(78	)		14,626
Total	$	27,155	$	—	$	(98	)	$	27,057

	December 31, 2018
	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
	(in thousands)
Cash and cash equivalents
Commercial paper	$	12,097	$	—	$	(21	)	$	12,076
Corporate bonds		870		—		—			870
Short-term investments
Commercial paper		13,334		—		(88	)		13,246
Corporate bonds		750		—		—			750
Total	$	27,051	$	—	$	(109	)	$	26,942

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 March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019
	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	$	26,057	$	(98	)	$	—	$	—	$	26,057	$	(98	)
Total	$	26,057	$	(98	)	$	—	$	—	$	26,057	$	(98	)

	December 31, 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	$	25,322	$	(109	)	$	—	$	—	$	25,322	$	(109	)
Corporate bonds		750		—			—		—		750		—
Total	$	26,072	$	(109	)	$	—	$	—	$	26,072	$	(109	)

Goodwill and Acquired Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2019

Goodwill And Intangible Assets Disclosure [Abstract]

Components of Acquired Intangible Assets (Finite Lived)

The components of acquired intangible assets as of March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019							December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Gross Carrying Amount		Accumulated Amortization			Net Carrying Value
	(in thousands)
Restaurant relationships	$	494,278	$	(110,647	)	$	383,631	$	494,278	$	(103,457	)	$	390,821
Diner acquisition		47,541		(12,683	)		34,858		47,541		(10,306	)		37,235
Developed technology		38,385		(12,304	)		26,081		38,385		(10,247	)		28,138
Trademarks		2,225		(2,225	)		—		2,225		(2,225	)		—
Below-market lease intangible		—		—			—		2,206		(124	)		2,082
Other		3,373		(2,630	)		743		3,676		(2,615	)		1,061
Total amortizable intangible assets		585,802		(140,489	)		445,313		588,311		(128,974	)		459,337
Indefinite-lived trademarks		89,676		—			89,676		89,676		—			89,676
Total acquired intangible assets	$	675,478	$	(140,489	)	$	534,989	$	677,987	$	(128,974	)	$	549,013

Components of Acquired Intangible Assets (Infinite Lived)

The components of acquired intangible assets as of March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019							December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Gross Carrying Amount		Accumulated Amortization			Net Carrying Value
	(in thousands)
Restaurant relationships	$	494,278	$	(110,647	)	$	383,631	$	494,278	$	(103,457	)	$	390,821
Diner acquisition		47,541		(12,683	)		34,858		47,541		(10,306	)		37,235
Developed technology		38,385		(12,304	)		26,081		38,385		(10,247	)		28,138
Trademarks		2,225		(2,225	)		—		2,225		(2,225	)		—
Below-market lease intangible		—		—			—		2,206		(124	)		2,082
Other		3,373		(2,630	)		743		3,676		(2,615	)		1,061
Total amortizable intangible assets		585,802		(140,489	)		445,313		588,311		(128,974	)		459,337
Indefinite-lived trademarks		89,676		—			89,676		89,676		—			89,676
Total acquired intangible assets	$	675,478	$	(140,489	)	$	534,989	$	677,987	$	(128,974	)	$	549,013

Changes in Carrying Amount of Goodwill

The change in the carrying amount of goodwill during the three months ended March 31, 2019 related to changes in the fair value of net deferred tax assets for the purchase price allocations of the Tapingo and LevelUp acquisitions during the measurement period were as follows:

	Goodwill			Accumulated Impairment Losses		Net Book Value
	(in thousands)
Balance as of December 31, 2018	$	1,019,239		$	—	$	1,019,239
Acquisitions		(13,858	)		—		(13,858	)
Balance as of March 31, 2019	$	1,005,381		$	—	$	1,005,381

Estimated Future Amortization of Acquired Intangible Assets

Estimated future amortization expense of acquired intangible assets as of March 31, 2019 was as follows:

	(in thousands)
The remainder of 2019	$	35,105
2020		44,381
2021		38,745
2022		36,776
2023		30,281
Thereafter		260,025
Total	$	445,313

Property and Equipment (Tables)

3 Months Ended

Mar. 31, 2019

Property Plant And Equipment [Abstract]

Components of Property and Equipment

The components of the Company’s property and equipment as of March 31, 2019 and December 31, 2018 were as follows:

	March 31, 2019			December 31, 2018
	(in thousands)
Developed software	$	104,818		$	90,302
Computer equipment		55,838			50,767
Leasehold improvements		41,827			39,550
Furniture and fixtures		12,408			10,801
Purchased software and digital assets		6,467			4,696
Construction in progress		6,446			1,976
Property and equipment		227,804			198,092
Accumulated depreciation and amortization		(91,457	)		(78,597	)
Property and equipment, net	$	136,347		$	119,495

Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2019

Commitments And Contingencies Disclosure [Abstract]

Components of Lease Costs

The components of lease costs, which consists of rent expense for leased office space, during the three months ended March 31, 2019 were as follows:

	Three Months Ended March 31, 2019
	(in thousands)
Fixed operating lease cost	$	3,808
Short-term lease cost		450
Sublease income		(47	)
Total lease cost	$	4,211

Supplemental Cash Flow Information Related to Operating Leases Average Lease Terms and Discount Rates

Supplemental cash flow information related to the Company’s operating leases as well as the weighted-average lease term and discount rate as of March 31, 2019, were as follows:

	Three Months Ended March 31, 2019
Cash paid for operating lease liabilities (in thousands)	$	3,169
Weighted-average remaining lease term (years)		8.9
Weighted-average discount rate		5.2	%

Summary of Future Minimum Operating Lease Payments

Future minimum lease payments under the Company’s operating lease agreements as of March 31, 2019 were as follows:

	(in thousands)
The remainder of 2019	$	10,459
2020		14,878
2021		14,244
2022		12,218
2023		12,218
Thereafter		57,572
Total future lease payments		121,589
Less interest		(25,748	)
Present value of lease liabilities	$	95,841

Summary of Future Minimum Payments under Non cancelable Operating Lease

As previously reported in the 2018 Form 10-K under ASC Topic 840, future minimum lease payments under the Company’s operating lease agreements that had initial or remaining non-cancelable lease terms in excess of one year as of December 31, 2018 were as follows:

	(in thousands)
2019	$	13,009
2020		14,874
2021		14,243
2022		12,219
2023		12,220
Thereafter		57,503
Total	$	124,068

Debt (Tables)

3 Months Ended

Mar. 31, 2019

Debt Disclosure [Abstract]

Schedule of Debt

The following table summarizes the carrying value of the Company’s debt as of March 31, 2019 and December 31, 2018:

	March 31, 2019			December 31, 2018
	(in thousands)
Term loan	$	322,968		$	120,312
Revolving loan		17,313			222,000
Total debt		340,281			342,312
Less current portion		(10,156	)		(6,250	)
Less unamortized deferred debt issuance costs		(1,932	)		(514	)
Long-term debt	$	328,193		$	335,548

Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2019

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 three months ended March 31, 2019 and 2018 were as follows:

	Three Months Ended March 31,
	2019			2018
Weighted-average fair value options granted	$	31.27		$	33.24
Average risk-free interest rate		2.44	%		2.38	%
Expected stock price volatility		48.1	%		45.7	%
Dividend yield	None			None
Expected stock option life (years)		4.00			4.00

Summary of Stock Option Activity

Stock option awards as of December 31, 2018 and March 31, 2019, and changes during the three months ended March 31, 2019, were as follows:

	Options			Weighted-Average Exercise Price		Aggregate Intrinsic Value (thousands)		Weighted-Average Exercise Term (years)
Outstanding at December 31, 2018		2,650,839		$	33.13	$	120,977		6.87
Granted		301,873			78.08
Forfeited		(15,978	)		98.64
Exercised		(105,881	)		22.90
Outstanding at March 31, 2019		2,830,853			37.93		99,134		6.97
Vested and expected to vest at March 31, 2019		2,825,796			37.87		99,115		6.96
Exercisable at March 31, 2019		1,701,724		$	25.44	$	76,536		5.96

Non-vested Restricted Stock Units

Non-vested restricted stock units as of December 31, 2018 and March 31, 2019, and changes during the three months ended March 31, 2019 were as follows:

	Restricted Stock Units
	Shares			Weighted-Average Grant Date Fair Value
Outstanding at December 31, 2018		2,328,857		$	67.33
Granted		1,323,526			77.95
Forfeited		(175,710	)		68.60
Vested		(336,290	)		63.84
Cancelled		(52,357	)		85.39
Outstanding at March 31, 2019		3,088,026		$	72.17

Earnings Per Share Attributable to Common Stockholders (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Income Per Share

The following table presents the calculation of basic and diluted net income per share attributable to common stockholders for the three months ended March 31, 2019 and 2018:

	Three Months Ended March 31,
	2019		2018
	(in thousands, except per share data)
Basic earnings per share:
Net income attributable to common stockholders (numerator)	$	6,890	$	30,766
Shares used in computation (denominator)
Weighted-average common shares outstanding		90,951		87,085
Basic earnings per share	$	0.08	$	0.35
Diluted earnings per share:
Net income attributable to common stockholders (numerator)	$	6,890	$	30,766
Shares used in computation (denominator)
Weighted-average common shares outstanding		90,951		87,085
Effect of dilutive securities:
Stock options		1,308		1,621
Restricted stock units		659		1,385
Weighted-average diluted shares		92,918		90,091
Diluted earnings per share	$	0.07	$	0.34

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 months ended March 31, 2019 and 2018 were as follows:

	Three Months Ended March 31,
	2019		2018
	(in thousands)
Anti-dilutive shares underlying stock-based awards:
Stock options		845		333
Restricted stock units		572		60

Fair Value Measurement (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019 and December 31, 2018:

	March 31, 2019						December 31, 2018
	Level 2		Level 3		Carrying Value		Level 2		Level 3		Carrying Value
	(in thousands)
Assets
Money market funds	$	135	$	—	$	135	$	61	$	—	$	61
Commercial paper		26,057		—		26,155		25,322		—		25,431
Corporate bonds		1,000		—		1,000		1,620		—		1,620
Total assets	$	27,192	$	—	$	27,290	$	27,003	$	—	$	27,112
Liabilities
Long-term debt, including current maturities	$	—	$	340,635	$	340,281	$	—	$	342,745	$	342,312
Total liabilities	$	—	$	340,635	$	340,281	$	—	$	342,745	$	342,312

Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Accounting Policies [Abstract]
Operating leases, right of use assets	$ 78,674	$ 81,200
Operating leases, liabilities	$ 95,841	$ 97,700

Acquisitions - Additional Information (Detail) - USD ($) $ in Thousands			3 Months Ended
	Nov. 07, 2018	Sep. 13, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Net cash payments to acquire businesses			$ (127)	$ (737)
Goodwill			1,005,381		$ 1,019,239
General and administrative expenses
Business Acquisition [Line Items]
Direct and indirect expense incurred related to acquisitions			$ 500	$ 1,300
Tapingo
Business Acquisition [Line Items]
Acquisition date	Nov. 07, 2018
Total purchase price net of cash acquired	$ 152,058
Net cash payments to acquire businesses	151,686
Cash acquired in business acquisition	1,500
Goodwill	119,321
Tapingo \| ISO
Business Acquisition [Line Items]
Fair value of assumed ISOs attributable to pre-combination service	372
LevelUp
Business Acquisition [Line Items]
Acquisition date		Sep. 13, 2018
Total purchase price net of cash acquired		$ 369,427
Net cash payments to acquire businesses		366,833
Cash acquired in business acquisition		6,000
Goodwill		296,198
LevelUp \| ISO
Business Acquisition [Line Items]
Fair value of assumed ISOs attributable to pre-combination service		$ 2,594
Tapingo and LevelUp
Business Acquisition [Line Items]
Total purchase price net of cash acquired	521,485
Net cash payments to acquire businesses	518,519
Goodwill	415,519
Tapingo and LevelUp \| ISO
Business Acquisition [Line Items]
Fair value of assumed ISOs attributable to pre-combination service	2,966
Post combination expense expected to be recognized related to replacement awards	$ 21,400

Schedule of Acquisition-Date Fair Value of Assets and Liabilities (Detail) - USD ($) $ in Thousands			3 Months Ended
	Nov. 07, 2018	Sep. 13, 2018	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill			$ 1,005,381		$ 1,019,239
Net cash paid			$ (127)	$ (737)
Tapingo
Business Acquisition [Line Items]
Accounts receivable	$ 3,101
Prepaid expenses and other current assets	843
Other assets	163
Goodwill	119,321
Net deferred tax asset	12,074
Accounts payable and accrued expenses	(4,478)
Total purchase price net of cash acquired	152,058
Net cash paid	151,686
Tapingo \| ISO
Business Acquisition [Line Items]
Fair value of assumed ISOs attributable to pre-combination service	(372)
LevelUp
Business Acquisition [Line Items]
Accounts receivable		$ 6,201
Prepaid expenses and other current assets		1,396
Property and equipment		895
Goodwill		296,198
Net deferred tax asset		31,545
Accounts payable and accrued expenses		(3,249)
Total purchase price net of cash acquired		369,427
Net cash paid		366,833
LevelUp \| ISO
Business Acquisition [Line Items]
Fair value of assumed ISOs attributable to pre-combination service		(2,594)
Tapingo and LevelUp
Business Acquisition [Line Items]
Accounts receivable	9,302
Prepaid expenses and other current assets	2,239
Property and equipment	895
Other assets	163
Goodwill	415,519
Net deferred tax asset	43,619
Accounts payable and accrued expenses	(7,727)
Total purchase price net of cash acquired	521,485
Net cash paid	518,519
Tapingo and LevelUp \| ISO
Business Acquisition [Line Items]
Fair value of assumed ISOs attributable to pre-combination service	(2,966)
Restaurant relationships \| Tapingo
Business Acquisition [Line Items]
Intangible assets	11,279
Restaurant relationships \| LevelUp
Business Acquisition [Line Items]
Intangible assets		10,217
Restaurant relationships \| Tapingo and LevelUp
Business Acquisition [Line Items]
Intangible assets	21,496
Diner acquisition \| LevelUp
Business Acquisition [Line Items]
Intangible assets		3,912
Diner acquisition \| Tapingo and LevelUp
Business Acquisition [Line Items]
Intangible assets	3,912
Below-market lease intangible \| LevelUp
Business Acquisition [Line Items]
Intangible assets		2,205
Below-market lease intangible \| Tapingo and LevelUp
Business Acquisition [Line Items]
Intangible assets	2,205
Developed technology \| Tapingo
Business Acquisition [Line Items]
Intangible assets	9,755
Developed technology \| LevelUp
Business Acquisition [Line Items]
Intangible assets		$ 20,107
Developed technology \| Tapingo and LevelUp
Business Acquisition [Line Items]
Intangible assets	$ 29,862

Acquisitions - Valuation Methods for Intangible Assets Acquired (Detail)	3 Months Ended
	Mar. 31, 2019
Restaurant relationships \| Tapingo
Business Acquisition [Line Items]
Valuation Method	Multi-period excess earnings
Restaurant relationships \| LevelUp
Business Acquisition [Line Items]
Valuation Method	With or without comparative business valuation
Diner acquisition \| Tapingo
Business Acquisition [Line Items]
Valuation Method	n/a
Diner acquisition \| LevelUp
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Developed technology \| Tapingo
Business Acquisition [Line Items]
Valuation Method	Cost to recreate
Developed technology \| LevelUp
Business Acquisition [Line Items]
Valuation Method	Multi-period excess earnings

Pro forma Summary of Operation (Detail) - Tapingo and LevelUp $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($) $ / shares
Business Acquisition [Line Items]
Revenues \| $	$ 243,347
Net income \| $	$ 21,621
Net income per share attributable to common shareholders:
Basic \| $ / shares	$ 0.25
Diluted \| $ / shares	$ 0.24

Pro Forma Adjustments for Additional Amortization of That Would Have Been Recognized on the Intangible Assets (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Interest expense	$ 3,500	$ 1,600
Income tax (benefit) expense	$ (862)	(236)
Tapingo and LevelUp \| Pro Forma
Business Acquisition Pro Forma Information Nonrecurring Adjustment [Line Items]
Depreciation and amortization		1,626
Transaction costs		(1,232)
Stock-based compensation		1,872
Interest expense		525
Income tax (benefit) expense		$ (826)

Summary of Held-to-Maturity Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	$ 27,155	$ 27,051
Unrealized Losses	(98)	(109)
Estimated Fair Value	27,057	26,942
Commercial Paper \| Cash and Cash Equivalents
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	11,451	12,097
Unrealized Losses	(20)	(21)
Estimated Fair Value	11,431	12,076
Commercial Paper \| Short Term Investments
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	14,704	13,334
Unrealized Losses	(78)	(88)
Estimated Fair Value	14,626	13,246
Corporate Bonds \| Cash and Cash Equivalents
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost	1,000	870
Estimated Fair Value	$ 1,000	870
Corporate Bonds \| Short Term Investments
Schedule Of Held To Maturity Securities [Line Items]
Amortized Cost		750
Estimated Fair Value		$ 750

Summary of Continuous Unrealized Loss on Marketable Securities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule Of Held To Maturity Securities [Line Items]
Estimated Fair Value, Less Than 12 Months	$ 26,057	$ 26,072
Unrealized Loss, Less Than 12 Months	(98)	(109)
Estimated Fair Value, 12 Months or Greater	0	0
Unrealized Loss, 12 Months or Greater	0	0
Estimated Fair Value, Total	26,057	26,072
Unrealized Loss, Total	(98)	(109)
Commercial Paper
Schedule Of Held To Maturity Securities [Line Items]
Estimated Fair Value, Less Than 12 Months	26,057	25,322
Unrealized Loss, Less Than 12 Months	(98)	(109)
Estimated Fair Value, 12 Months or Greater	0	0
Unrealized Loss, 12 Months or Greater	0	0
Estimated Fair Value, Total	26,057	25,322
Unrealized Loss, Total	$ (98)	(109)
Corporate Bonds
Schedule Of Held To Maturity Securities [Line Items]
Estimated Fair Value, Less Than 12 Months		750
Unrealized Loss, Less Than 12 Months		0
Estimated Fair Value, 12 Months or Greater		0
Unrealized Loss, 12 Months or Greater		0
Estimated Fair Value, Total		750
Unrealized Loss, Total		$ 0

Marketable Securities - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Schedule Of Held To Maturity Securities [Line Items]
Other-than-temporary impairment losses related to marketable securities	$ 0	$ 0
Net Interest (Income) Expense
Schedule Of Held To Maturity Securities [Line Items]
Interest income	$ 700,000	$ 600,000

Components of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	$ 585,802	$ 588,311
Amortizable intangible assets, Accumulated Amortization	(140,489)	(128,974)
Amortizable intangible assets, Net Carrying Value	445,313	459,337
Indefinite-lived trademarks	89,676	89,676
Total acquired intangible assets, Gross Carrying Amount	675,478	677,987
Total acquired intangible assets, Net Carrying Value	534,989	549,013
Restaurant relationships
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	494,278	494,278
Amortizable intangible assets, Accumulated Amortization	(110,647)	(103,457)
Amortizable intangible assets, Net Carrying Value	383,631	390,821
Diner acquisition
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	47,541	47,541
Amortizable intangible assets, Accumulated Amortization	(12,683)	(10,306)
Amortizable intangible assets, Net Carrying Value	34,858	37,235
Developed technology
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	38,385	38,385
Amortizable intangible assets, Accumulated Amortization	(12,304)	(10,247)
Amortizable intangible assets, Net Carrying Value	26,081	28,138
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)	(2,225)
Below-market lease intangible
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount		2,206
Amortizable intangible assets, Accumulated Amortization		(124)
Amortizable intangible assets, Net Carrying Value		2,082
Other
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Gross Carrying Amount	3,373	3,676
Amortizable intangible assets, Accumulated Amortization	(2,630)	(2,615)
Amortizable intangible assets, Net Carrying Value	$ 743	$ 1,061

Goodwill and Acquired Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible assets amortization expense	$ 11,900	$ 11,500

Schedule of Carrying Amount of Goodwill (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill, Begining Balance	$ 1,019,239
Goodwill, Acquisition	(13,858)
Goodwill, Ending Balance	1,005,381
Net Book Value, Beginning Balance	1,019,239
Net Book Value, Acquisition	(13,858)
Net Book Value, Ending Balance	$ 1,005,381

Estimated Future Amortization of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]
The remainder of 2019	$ 35,105
2020	44,381
2021	38,745
2022	36,776
2023	30,281
Thereafter	260,025
Amortizable intangible assets, Net Carrying Value	$ 445,313	$ 459,337

Components of Property and Equipment (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Property Plant And Equipment [Line Items]
Property and equipment	$ 227,804	$ 198,092
Accumulated depreciation and amortization	(91,457)	(78,597)
Property and equipment, net	136,347	119,495
Developed software
Property Plant And Equipment [Line Items]
Property and equipment	104,818	90,302
Computer equipment
Property Plant And Equipment [Line Items]
Property and equipment	55,838	50,767
Leasehold improvements
Property Plant And Equipment [Line Items]
Property and equipment	41,827	39,550
Furniture and fixtures
Property Plant And Equipment [Line Items]
Property and equipment	12,408	10,801
Purchased Software and Digital Assets
Property Plant And Equipment [Line Items]
Property and equipment	6,467	4,696
Construction in progress
Property Plant And Equipment [Line Items]
Property and equipment	$ 6,446	$ 1,976

Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 25,089	$ 20,951
Capitalized developed software costs	14,500	8,200
Property And Equipment Excluding Developed Software
Property Plant And Equipment [Line Items]
Depreciation and amortization	6,200	5,100
Developed software
Property Plant And Equipment [Line Items]
Depreciation and amortization	$ 7,000	$ 4,400

Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
Commitments And Contingencies Disclosure [Abstract]
Description of operating lease agreements	As of March 31, 2019, the Company had operating lease agreements for its office facilities in various locations throughout the U.S, as well as in the U.K. and Israel, which expire at various dates through September 2029.
Lease renewal period	5 years
Lessee, operating lease, existence of option to extend [true false]	true
Lessee, operating lease, existence of option to terminate [true false]	true
Operating lease right-of-use assets	$ 78,674	$ 81,200
Operating lease liabilities current	13,436
Operating lease liabilities non current	82,405
Future obligations for office facilities not yet commenced	$ 27,000
Operating lease term not yet commenced	11 years

Components of Lease Costs (Detail) $ in Thousands	3 Months Ended
Components of Lease Costs (Detail) $ in Thousands	Mar. 31, 2019 USD ($)
Lessee Operating Lease Description [Abstract]
Fixed operating lease cost	$ 3,808
Short-term lease cost	450
Sublease income	(47)
Total lease cost	$ 4,211

Supplemental Cash Flow Information Related to Operating Leases Average Lease Terms and Discount Rates (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Lessee Operating Lease Description [Abstract]
Cash paid for operating lease liabilities (in thousands)	$ 3,169
Weighted-average remaining lease term (years)	8 years 10 months 24 days
Weighted-average discount rate	5.20%

Summary of Future Minimum Operating Lease Payments (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019
Lessee Operating Lease Description [Abstract]
The remainder of 2019	$ 10,459
2020	14,878
2021	14,244
2022	12,218
2023	12,218
Thereafter	57,572
Total future lease payments	121,589
Less interest	(25,748)
Present value of lease liabilities	$ 95,841	$ 97,700

Summary of Future Minimum Payments under Non cancelable Operating Lease (Detail) $ in Thousands	Dec. 31, 2018 USD ($)
Leases [Abstract]
2019	$ 13,009
2020	14,874
2021	14,243
2022	12,219
2023	12,220
Thereafter	57,503
Total	$ 124,068

Commitments and Contingencies - Additional Information (Detail1) $ in Millions	Mar. 31, 2019 USD ($)
Maximum \| Merger Income Tax Consequences
Loss Contingencies [Line Items]
Indemnification related to business combination	$ 15.0

Schedule of Debt (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt	$ 340,281	$ 342,312
Less current portion	(10,156)	(6,250)
Less unamortized deferred debt issuance costs	(1,932)	(514)
Long-term debt	328,193	335,548
Term loan
Debt Instrument [Line Items]
Total debt	322,968	120,312
Revolving loan
Debt Instrument [Line Items]
Total debt	$ 17,313	$ 222,000

Debt - Additional Information (Detail) - USD ($)		3 Months Ended
Debt - Additional Information (Detail) - USD ($)	Feb. 06, 2019	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Debt Instrument [Line Items]
Repayment of borrowings		$ 2,031,000	$ 25,781,000
Long-term debt		340,281,000		$ 342,312,000
Unamortized Debt Issuance Expense		3,300,000		1,900,000
Interest expense		3,500,000	$ 1,600,000
Revolving Loans
Debt Instrument [Line Items]
Long-term debt		$ 17,313,000		$ 222,000,000
Credit Agreement
Debt Instrument [Line Items]
Credit facility, additional borrowing capacity	$ 250,000,000
Credit facility, expiration date	Feb. 05, 2024
Credit Agreement \| Revolving Loans
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 225,000,000
Credit Agreement \| Term Loans
Debt Instrument [Line Items]
Long-term debt	325,000,000
Prior Credit Facility
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 350,000,000
Credit facility, expiration date	Oct. 09, 2022

Stock-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$ 16,478	$ 10,231
Total unrecognized stock-based compensation expense	$ 244,700
Unrecognized compensation expense recognition period	3 years 2 months 12 days
Stock-based compensation capitalized as website and software development cost	$ 3,200	1,700
Options, Granted	301,873
Aggregate intrinsic value of awards exercised	$ 6,100	14,600
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$ 4,000	2,400
Unrecognized compensation expense recognition period	2 years 8 months 12 days
Unrecognized stock-based compensation expense	$ 38,500
Restricted Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation	$ 12,500	7,800
Unrecognized compensation expense recognition period	3 years 2 months 12 days
Fair value of awards vested during the period	$ 26,900	$ 30,300
Unrecognized compensation expense related to share based awards other than options	$ 206,200
Non-vested restricted stock units or awards expected to vest	3,052,839
Weighted average grant date fair value	$ 72.06
2015 Long-Term Incentive Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Options, Granted	301,873	332,723
ASU 2016-09 \| Income Tax Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Recognized excess tax benefits from stock-based compensation	$ 2,300	$ 8,200
Excess tax benefits from stock-based compensation	$ 2,300	$ 8,200

Assumptions Used to Determine Fair Value of Stock Options Granted (Detail) - $ / shares	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Weighted-average fair value options granted	$ 31.27	$ 33.24
Average risk-free interest rate	2.44%	2.38%
Expected stock price volatility	48.10%	45.70%
Dividend yield	0.00%	0.00%
Expected stock option life (years)	4 years	4 years

Stock Option Activity (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Options
Options, Beginning Balance	2,650,839
Options, Granted	301,873
Options, Forfeited	(15,978)
Options, Exercised	(105,881)
Options, Ending Balance	2,830,853	2,650,839
Options, Vested and expected to vest	2,825,796
Options, Exercisable	1,701,724
Weighted-Average Exercise Price
Weighted-Average Exercise Price, Beginning Balance	$ 33.13
Weighted-Average Exercise Price, Granted	78.08
Weighted-Average Exercise Price, Forfeited	98.64
Weighted-Average Exercise Price, Exercised	22.90
Weighted-Average Exercise Price, Ending Balance	37.93	$ 33.13
Weighted-Average Exercise Price, Vested and expected to vest	37.87
Weighted-Average Exercise Price, Exercisable	$ 25.44
Aggregate Intrinsic Value/Weighted-Average Exercise Term
Aggregate Intrinsic Value	$ 99,134	$ 120,977
Aggregate Intrinsic Value, Vested and expected to vest	99,115
Aggregate Intrinsic Value, Exercisable	$ 76,536
Weighted-Average Exercise Term, Outstanding Balance	6 years 11 months 19 days	6 years 10 months 13 days
Weighted-Average Exercise Term, Vested and expected to vest	6 years 11 months 15 days
Weighted-Average Exercise Term, Exercisable	5 years 11 months 15 days

Non-vested Restricted Stock Units (Detail) - Restricted Stock Units	3 Months Ended
	Mar. 31, 2019 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Beginning Balance \| shares	2,328,857
Shares, Granted \| shares	1,323,526
Shares, Forfeited \| shares	(175,710)
Shares, Vested \| shares	(336,290)
Shares, Cancelled \| shares	(52,357)
Shares, Ending Balance \| shares	3,088,026
Weighted-Average Grant Date Fair Value, Beginning Balance \| $ / shares	$ 67.33
Weighted-Average Grant Date Fair Value, Granted \| $ / shares	77.95
Weighted-Average Grant Date Fair Value, Forfeited \| $ / shares	68.60
Weighted-Average Grant Date Fair Value, Vested \| $ / shares	63.84
Weighted-Average Grant Date Fair Value, Cancelled \| $ / shares	85.39
Weighted-Average Grant Date Fair Value, Ending Balance \| $ / shares	$ 72.17

Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Effective income tax rate	(14.30%)	(0.80%)
Excess tax benefits from stock-based compensation	$ 2.3	$ 8.2
Income tax examination description	The Company is currently under examination for Tapingo’s federal income tax return for the tax year ended December 31, 2016. The Company does not believe, but cannot predict with certainty, that there will be any additional tax liabilities, penalties or interest as a result of the audit.

Stockholders' Equity - Additional Information (Detail) - USD ($)		3 Months Ended
	Apr. 25, 2018	Mar. 31, 2019	Dec. 31, 2018	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		91,074,285	90,756,548
Common stock, shares outstanding		91,074,285	90,756,548
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
Investment Agreement \| Common stock \| Accredited Investor
Class Of Stock [Line Items]
Stock Issued and sold	2,820,464
Aggregate purchase price	$ 200,000,000

Computation of Basic and Diluted Net Income Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Basic earnings per share:
Net income attributable to common stockholders (numerator)	$ 6,890	$ 30,766
Shares used in computation (denominator)
Weighted-average common shares outstanding	90,951	87,085
Basic earnings per share	$ 0.08	$ 0.35
Diluted earnings per share:
Net income attributable to common stockholders (numerator)	$ 6,890	$ 30,766
Shares used in computation (denominator)
Weighted-average common shares outstanding	90,951	87,085
Effect of dilutive securities:
Weighted-average diluted shares	92,918	90,091
Diluted earnings per share	$ 0.07	$ 0.34
Stock Options
Effect of dilutive securities:
Stock options, Restricted stock units, shares	1,308	1,621
Restricted Stock Units
Effect of dilutive securities:
Stock options, Restricted stock units, shares	659	1,385

Anti-dilutive Securities Excluded from Calculation of Diluted Net Income Per Share (Detail) - shares shares in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Stock Options
Anti-dilutive shares underlying stock-based awards:
Anti-dilutive shares underlying stock-based awards	845	333
Restricted Stock Units
Anti-dilutive shares underlying stock-based awards:
Anti-dilutive shares underlying stock-based awards	572	60

Schedule of Fair Value and Carrying Value of Assets and Liabilities Recorded at Other Than Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Fair Value \| Level 2
Assets
Assets, fair value disclosure	$ 27,192	$ 27,003
Fair Value \| Level 3
Liabilities
Long-term debt, including current maturities	340,635	342,745
Total liabilities	340,635	342,745
Carrying Value
Assets
Assets, fair value disclosure	27,290	27,112
Liabilities
Long-term debt, including current maturities	340,281	342,312
Total liabilities	340,281	342,312
Money Market Funds \| Fair Value \| Level 2
Assets
Assets, fair value disclosure	135	61
Money Market Funds \| Carrying Value
Assets
Assets, fair value disclosure	135	61
Commercial Paper \| Fair Value \| Level 2
Assets
Assets, fair value disclosure	26,057	25,322
Commercial Paper \| Carrying Value
Assets
Assets, fair value disclosure	26,155	25,431
Corporate Bonds \| Fair Value \| Level 2
Assets
Assets, fair value disclosure	1,000	1,620
Corporate Bonds \| Carrying Value
Assets
Assets, fair value disclosure	$ 1,000	$ 1,620