Stock-Based Compensation Expense and Employee Benefit Plans - Number of Shares Available for Grant (Details)	6 Months Ended
	Jun. 30, 2022 shares
Share-based Compensation Arrangement by Share-based Payment Award, Available for Grant [Roll Forward]
Beginning balance (in shares)	24,146,784
Added to plan (in shares)	8,384,460
Granted (in shares)	(4,507,452)
Cancelled/Forfeited (in shares)	602,506
Expired (in shares)	(211,521)
Ending Balance (in shares)	28,414,777