Goodwill and Acquired Intangible Assets, Net - Summary of Intangible Assets Acquired Net (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]
Net Book Value	$ 1,036,800	$ 1,086,332
Long Lived Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,374,866	1,358,052
Accumulated Amortization	(338,066)	(271,720)
Net Book Value	1,036,800	1,086,332
Short and Long Lived Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,408,450	1,387,921
Accumulated Amortization	(367,436)	(297,319)
Net Book Value	$ 1,041,014	1,090,602
Apps [Member] | Short Lived Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (Years)	4 months 24 days
Gross Carrying Value	$ 33,584	29,869
Accumulated Amortization	(29,370)	(25,599)
Net Book Value	$ 4,214	4,270
Apps [Member] | Long Lived Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (Years)	4 years 2 months 12 days
Gross Carrying Value	$ 1,239,252	1,222,417
Accumulated Amortization	(290,213)	(232,832)
Net Book Value	$ 949,039	989,585
User Base [Member] | Long Lived Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (Years)	5 years
Gross Carrying Value	$ 68,817	68,817
Accumulated Amortization	(20,055)	(17,617)
Net Book Value	$ 48,762	51,200
License Asset [Member] | Long Lived Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (Years)	7 months 6 days
Gross Carrying Value	$ 28,551	28,551
Accumulated Amortization	(15,266)	(10,918)
Net Book Value	$ 13,285	17,633
Developed technology [Member] | Long Lived Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (Years)	1 year 2 months 12 days
Gross Carrying Value	$ 14,946	14,946
Accumulated Amortization	(9,812)	(8,489)
Net Book Value	$ 5,134	6,457
Other [Member] | Long Lived Intangible Assets [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Useful Life (Years)	7 years 4 months 24 days
Gross Carrying Value	$ 23,300	23,321
Accumulated Amortization	(2,720)	(1,864)
Net Book Value	$ 20,580	$ 21,457