Digital Assets - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) Bitcoin	Sep. 30, 2020 USD ($) Bitcoin	Dec. 31, 2020 USD ($) Bitcoin
Intangible Assets Net Excluding Goodwill [Abstract]
Number of bitcoins purchased | Bitcoin			43,573	38,250
Purchases of digital assets, amount			$ 2,035,471	$ 425,000
Trade credits payable	$ 0		0
Digital asset impairment losses	65,165	$ 44,242	$ 684,034	44,242
Number of carrying value bitcoins | Bitcoin			114,042		70,469
Digital assets	2,405,739		$ 2,405,739		$ 1,054,302
Cumulative impairment of digital assets			754,700		$ 70,700
Sale of digital assets	$ 0	$ 0	$ 0	$ 0
Number of digital assets held | Bitcoin			13,449