Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2018	Dec. 31, 2017
Income Taxes
Unrecognized tax benefits	$ 4,600
Unrecognized tax benefits would impact the effective tax rate	4,400
Cumulative accrued interest	$ 300
Effective tax rate from operations	40.30%	70.40%
(Benefit from) provision for income taxes	$ (74,264)	$ 1,560
Effective U.S corporate tax rate	21.00%				35.00%
Provision for transition tax				$ 37,200	$ 40,300
Measurement period adjustment to reduce transition tax				$ (3,100)
Transition tax, unpaid	$ 28,000
Transition Tax over an eight-year period beginning	2018
Digital asset impairment losses	$ 194,095	$ 0
Tax benefit of impairment losses	54,300
Tax benefit from stock options exercise	22,100
Other Long-term Liabilities
Income Taxes
Transition tax, unpaid	25,100
Accounts Payable, Accrued Expenses and Operating Lease Liabilities
Income Taxes
Transition tax, unpaid	3,000
U.S
Income Taxes
Cash and cash equivalents and short-term investments	$ 22,200		$ 13,700
U.S | Earliest Tax Year
Income Taxes
Tax years subject to examination	2016
Italy | Earliest Tax Year
Income Taxes
Tax years subject to examination	2016
Poland | Earliest Tax Year
Income Taxes
Tax years subject to examination	2015
Spain | Earliest Tax Year
Income Taxes
Tax years subject to examination	2017
United Kingdom | Earliest Tax Year
Income Taxes
Tax years subject to examination	2017
Germany | Earliest Tax Year
Income Taxes
Tax years subject to examination	2016
Foreign
Income Taxes
Cash and cash equivalents and short-term investments	$ 60,300		46,000
Foreign earnings repatriated	25,500		$ 186,600
Undistributed foreign earnings	$ 119,300