Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (75,461)	$ (33,427)
Adjustments to reconcile net loss to net cash from operating activities:
Depreciation	12,294	8,658
Amortization of intangible assets and developed software	25,423	24,705
Stock-based compensation	20,954	20,185
Deferred taxes	(954)	(2,725)
Other	(448)	3,479
Change in assets and liabilities:
Accounts receivable	6,861	(18,333)
Income taxes receivable	243	(16,311)
Prepaid expenses and other assets	(83)	(4,602)
Restaurant food liability	(5,522)	20,857
Accounts payable	(3,460)	4,678
Accrued payroll	13,525	4,277
Other accruals	30,583	26,085
Net cash provided by operating activities	23,955	37,526
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of investments	(31,150)	(19,790)
Proceeds from maturity of investments	28,465	32,900
Capitalized website and development costs	(13,848)	(14,243)
Purchases of property and equipment	(9,833)	(19,678)
Acquisition of other intangible assets		(510)
Other cash flows from investing activities	(200)	(250)
Net cash used in investing activities	(26,566)	(21,571)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from borrowings under the credit facility		175,000
Taxes paid related to net settlement of stock-based compensation awards	(9,028)	(8,051)
Proceeds from exercise of stock options	1,088	1,414
Other cash flows from financing activities	(900)
Net cash provided by (used in) financing activities	(8,840)	168,363
Net change in cash, cash equivalents, and restricted cash	(11,451)	184,318
Effect of exchange rates on cash, cash equivalents and restricted cash	66	(600)
Cash, cash equivalents, and restricted cash at beginning of year	362,897	379,594
Cash, cash equivalents, and restricted cash at end of the period	351,512	563,312
SUPPLEMENTAL DISCLOSURE OF NON-CASH ITEMS
Capitalized property, equipment and website and development costs in accounts payable at period end	2,233	3,830
RECONCILIATION OF CASH, CASH EQUIVALENTS, AND RESTRICTED CASH
Cash and cash equivalents	348,837	560,708
Restricted cash included in other assets	$ 2,675	$ 2,604
Restricted Cash, Noncurrent, Asset, Statement of Financial Position [Extensible List]	Other assets	Other assets
Total cash, cash equivalents, and restricted cash	$ 351,512	$ 563,312