Condensed Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 24,263	$ 6,747	$ 7,919
Adjustments to reconcile net income to net cash from operating activities:
Depreciation	5,032	3,992	2,018
Provision for doubtful accounts	426	473	74
Loss on disposal of fixed assets	11
Deferred taxes	4,612	1,706
Intangible asset amortization	17,655	9,477	4,071
Tenant allowance amortization	(159)	(159)	(160)
Stock-based compensation	9,393	4,933	2,364
Deferred rent	(17)	(135)	797
Investment premium amortization	315
Change in assets and liabilities, net of the effects of business acquisitions:
Accounts receivable	(7,394)	(8,298)	(526)
Prepaid expenses and other assets	(1,669)	(2,388)	(582)
Restaurant food liability	13,414	26,549	12,854
Accounts payable	(259)	2,065	319
Accrued payroll	4,243	(1,707)	162
Other accruals	3,038	(2,192)	2,678
Due to related party		(244)	(2,410)
Net cash provided by operating activities	72,904	40,819	29,578
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of investments	(113,156)
Proceeds from maturity of investments	1,500
Capitalized website and development costs	(3,431)	(2,592)	(2,280)
Purchases of property and equipment	(3,653)	(4,429)	(3,417)
Cash acquired in merger of GrubHub Holdings Inc.		13,266
Issuance of note receivable to related party			(26,400)
Payments on note receivable from related party			42,400
Net cash provided by (used in) investing activities	(118,740)	6,245	10,303
CASH FLOWS FROM FINANCING ACTIVITIES
Net proceeds from the issuance of common stock	142,541
Repurchases of common stock	(116)	(1,367)	(858)
Proceeds from exercise of stock options	8,322	1,418	116
Excess tax benefit related to stock-based compensation	12,975
Taxes paid related to net settlements of stock-based compensation awards	(2,070)
Checks issued in excess of bank balance			(3,923)
Payment of note payable			(1,965)
Contributions from members			6,000
Preferred stock tax distributions	(320)	(1,893)	(1,588)
Net cash provided by (used in) financing activities	161,332	(1,842)	(2,218)
Net change in cash and cash equivalents	115,496	45,222	37,663
Effect of exchange rates on cash	(242)	159	115
Cash and cash equivalents at beginning of year	86,542	41,161	3,383
Cash and cash equivalents at end of year	201,796	86,542	41,161
SUPPLEMENTAL DISCLOSURE OF NON CASH ITEMS
Fair value of common and preferred stock issued in acquisition of GrubHub Holdings Inc.		421,485
Cash paid for income taxes	1,326	7,706	861
Cashless exercise of stock options	1,054
Settlement of receivable through cashless acquisition of treasury shares in connection with the cashless exercise of stock options	3,239
Cashless Exercise
SUPPLEMENTAL DISCLOSURE OF NON CASH ITEMS
Settlement of receivable through cashless acquisition of treasury shares in connection with the cashless exercise of stock options	$ (3,123)