Pension Plans - Net Periodic Benefit Cost (Credit) (Details) - Pension Plan [Member] - Qualified Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]
Interest cost	$ 540	$ 478	$ 1,066	$ 950
Expected return on plan assets	(1,031)	(1,028)	(2,062)	(2,047)
Amortization of net actuarial loss	223	295	423	584
Net settlement loss	853	566	853	566
Total net periodic pension income	$ 585	$ 311	$ 280	$ 53
Discount rate (as a percent)	4.23%		4.23%		2.42%
Increase in liability under the pension plan			$ 6,400