Employee Benefit Plans - Restricted Stock Activity (Details) - Restricted stock outstanding - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee Benefit Plans
Compensation cost	$ 27,200	$ 7,600	$ 2,800
Unrecognized compensation cost	$ 74,500	41,500	8,400
Period for recognition	2 years 3 months 18 days
Fair value of restricted stock units vested	$ 76,000	$ 23,300	$ 2,000
Shares
Unvested restricted stock, beginning balance (in shares)	5,874,642
Granted (in shares)	1,894,356
Vested (in shares)	(2,807,124)
Forfeited (in shares)	(110,001)
Unvested restricted stock, end balance (in shares)	4,851,873	5,874,642
Weighted Average Grant Date Fair Value
Unvested restricted stock, beginning balance, weighted average grant date fair value	$ 7.88
Granted, weighted average grant date fair value	32.35	$ 12.61	$ 2.30
Vested, weighted average grant date fair value	6.19
Forfeited, weighted average grant date fair value	11.23
Unvested restricted stock, end balance, weighted average grant date fair value	$ 21.59	$ 7.88
Aggregate Intrinsic Value
Unvested restricted stock, end balance, aggregate intrinsic value	$ 136,968
Minimum
Employee Benefit Plans
Vesting period	1 year
Maximum
Employee Benefit Plans
Vesting period	3 years