Pension Plans - Qualified Plan - Change in Benefit Obligation (Details) - Pension Plan [Member] - Qualified Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Benefit obligation at beginning of year	$ 86,748	$ 82,518
Interest cost	1,715	1,969	$ 2,713
Actuarial (gain) loss	(4,547)	8,568
Benefits paid	(7,236)	(6,307)
Benefit obligation at end of year	$ 76,680	$ 86,748	$ 82,518