Income Taxes - Allocation of Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
Income tax expense	$ 24,982	$ 13,670	$ 9,447
Income tax recorded in accumulated other comprehensive loss, Income tax expense (benefit)	367	(386)	116
Total income tax expense	$ 25,349	$ 13,284	$ 9,563