Pension Plans - Qualified Plan - Change in Benefit Obligation (Details) - Pension Plan [Member] - Qualified Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 76,680	$ 86,748
Interest cost	2,253	1,715	$ 1,969
Actuarial gain	(11,086)	(4,547)
Benefits paid	(6,925)	(7,236)
Benefit obligation at end of year	$ 60,922	$ 76,680	$ 86,748