Federal Income Taxes - Narrative (Details) - USD ($)			12 Months Ended
	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Permanent tax benefit percentage			14.00%
Permanent tax benefit			$ 120,000	$ 2,500,000
Adjustment to tax reserves	$ 332,900,000
Federal statutory income tax rate	21.00%	21.00%	21.00%
Deferred tax liability from Tax Act		$ 69,900,000	$ 34,900,000
Annual adjustment to tax reserves	$ 41,600,000
Annual income tax expense from adjustment to tax reserves	$ 8,700,000
Valuation allowances for deferred tax assets			0	0
Reserve for uncertain tax positions			0
Accruals for interest or penalties related to unrecognized tax benefits			$ 0	$ 0