Employee Benefit Plans (Details) - 401(k) Plan - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee Benefit Plans
Maximum annual employee contribution, as a percentage	20.00%
Maximum annual employee contribution	$ 19,500
Aggregate discretionary employer matching contributions	$ 3,500,000	$ 3,400,000	$ 3,400,000