Income Taxes - Components of Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosures [Line Items]
Current Federal Tax Expense (Benefit)	$ 25,395	$ 7,962	$ 9,424
Current State and Local Tax Expense (Benefit)	721	7	164
Deferred Federal Income Tax Expense (Benefit)	(1,759)	(6,414)	7,357
Deferred State and Local Income Tax Expense (Benefit)	158	109	128
Total income tax expense	$ 24,515	1,664	17,073
Valuation Allowance, Commentary	No
Subsidiaries [Member]
Income Tax Disclosures [Line Items]
Current Federal Tax Expense (Benefit)	$ 52,616	10,607	18,093
Current State and Local Tax Expense (Benefit)	670	383	570
Deferred Federal Income Tax Expense (Benefit)	(9,027)	15,252	20,485
Deferred State and Local Income Tax Expense (Benefit)	0	0	0
Total income tax expense	$ 44,259	$ 26,242	$ 39,148