Pension Plans - Qualified Plan - Net Periodic Pension (Income) Expense (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, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	$ 1,715	$ 1,969	$ 2,713
Expected return on plan assets	(4,253)	(4,101)	(3,849)
Recognized net actuarial loss	689	1,004	970
Net settlement loss	1,379	1,740	1,904
Total net periodic pension expense	$ (470)	$ 612	$ 1,738