Employee Benefit Plans (Benefit Obligations in Excess of the Fair Value of Plan's Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Employee Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 101,526	$ 107,824	$ 102,607
Accumulated benefit obligation	101,526	107,824
Fair value of plans' assets	73,375	71,940	$ 73,357
Projected benefit obligation greater than fair value of plans' assets	28,151	35,884
Accumulated benefit obligation greater than fair value of plans' assets	28,151	35,884
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	98,570	104,657
Accumulated benefit obligation	98,570	104,657
Fair value of plans' assets	73,375	71,940
Projected benefit obligation greater than fair value of plans' assets	25,195	32,717
Accumulated benefit obligation greater than fair value of plans' assets	25,195	32,717
Benefit Equalization Plan
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	2,956	3,167
Accumulated benefit obligation	2,956	3,167
Fair value of plans' assets	0	0
Projected benefit obligation greater than fair value of plans' assets	2,956	3,167
Accumulated benefit obligation greater than fair value of plans' assets	$ 2,956	$ 3,167