Employee Benefit Plans Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 2,244	$ 2,726	$ 3,257
Expected return on assets	(4,044)	(3,925)	(2,754)
Net amortization and deferral	2,017	1,859	1,981
Net periodic benefit cost	217	660	2,484
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	32	43	61
Net amortization and deferral	(536)	(548)	(556)
Net periodic benefit cost	$ (504)	$ (505)	$ (495)