Income Taxes - Components of Federal Corporate Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Current income tax expense	$ 35,609	$ 38,645	$ 32,796
Deferred income tax expense	11,926	(2,273)	(2,489)
Income tax expense	$ 47,535	$ 36,372	$ 30,307