Pensions and Other Postretirement Benefit Plans (Schedule of Net Pension Plan Funded Status) (Details) - Pension plans - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Assets for plan benefits, defined benefit plan	$ 26,711
Pension plans without pension assets	(33,460)
Net amount recognized	(6,749)	$ (15,456)
United States
Defined Benefit Plan Disclosure [Line Items]
Assets for plan benefits, defined benefit plan	1,551
Pension plans without pension assets	(6,022)
Net amount recognized	(4,471)
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Assets for plan benefits, defined benefit plan	25,160
Pension plans without pension assets	(27,438)
Net amount recognized	$ (2,278)