Income Taxes - Provision (benefit) for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Provision (benefit) for income taxes:
Federal	$ 20,200	$ 11,000	$ 31,200
State	4,600	3,100	6,500
Foreign	1,400	1,300	1,900
Current Income Tax Expense	26,200	15,400	39,600
Deferred
Federal	(2,300)	(17,300)	(3,800)
State	200	(2,700)	(1,700)
Deferred income tax expense (benefit)	(2,065)	(20,049)	(5,494)
Provision (benefit) for income taxes	$ 24,059	$ (4,568)	$ 34,127