Retirement Plans - Components of Prepaid (Accrued) Cost (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Retirement Plans
Prepaid pension asset	$ 49,382	$ 56,642
Post-Retirement Life Insurance Plan
Retirement Plans
Accrued expenses and other liabilities	(489)	(451)
Long-term pension obligations	(4,742)	(4,924)
Components of prepaid (accrued) cost, net	(5,231)	(5,375)
UNITED STATES
Retirement Plans
Prepaid pension asset	49,382	56,642
Accrued expenses and other liabilities	(100)	(100)
Long-term pension obligations	(908)	(1,072)
Components of prepaid (accrued) cost, net	48,374	55,470
Foreign Plan
Retirement Plans
Prepaid pension asset	0	0
Accrued expenses and other liabilities	0	0
Long-term pension obligations	(914)	(1,091)
Components of prepaid (accrued) cost, net	$ (914)	$ (1,091)