Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Valuation allowance
Income tax provision	$ 6,698	$ 2,807	$ 12,261	$ 6,119
Increase in income tax expense	3,900		6,200
Increase in pretax income	20,600		33,700
Deferred tax assets, net	44,206		44,206		$ 57,851
Deferred tax assets valuation allowance	$ 10,200		$ 10,200
Maximum
Valuation allowance
Statutory income tax rate (as a percent)	21.00%	21.00%	21.00%	21.00%