Components of Acquired Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Total acquired intangible assets, Gross Carrying Amount	$ 674,501	$ 677,987
Amortizable intangible assets, Accumulated Amortization	(174,020)	(128,974)
Total acquired intangible assets, Net Carrying Value	500,481	549,013
Amortizable intangible assets, Gross Carrying Amount	584,825	588,311
Amortizable intangible assets, Net Carrying Value	410,805	459,337
Indefinite-lived trademarks	89,676	89,676
Restaurant relationships
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Accumulated Amortization	(135,482)	(103,457)
Amortizable intangible assets, Gross Carrying Amount	497,788	494,278
Amortizable intangible assets, Net Carrying Value	362,306	390,821
Diner acquisition
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Accumulated Amortization	(19,909)	(10,306)
Amortizable intangible assets, Gross Carrying Amount	48,293	47,541
Amortizable intangible assets, Net Carrying Value	28,384	37,235
Developed technology
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Accumulated Amortization	(15,916)	(10,247)
Amortizable intangible assets, Gross Carrying Amount	35,826	38,385
Amortizable intangible assets, Net Carrying Value	19,910	28,138
Other
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Accumulated Amortization	(2,713)	(2,615)
Amortizable intangible assets, Gross Carrying Amount	2,918	3,676
Amortizable intangible assets, Net Carrying Value	$ 205	1,061
Trademarks
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Accumulated Amortization		(2,225)
Amortizable intangible assets, Gross Carrying Amount		2,225
Below-market lease intangible
Schedule Of Finite And Indefinite Lived Intangible Assets [Line Items]
Amortizable intangible assets, Accumulated Amortization		(124)
Amortizable intangible assets, Gross Carrying Amount		2,206
Amortizable intangible assets, Net Carrying Value		$ 2,082