Pension (Projected & Accumulated Benefit Obligations in Excess of Plan Assets) (Details) - Pension Plan - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 352,572	$ 300,854
Accumulated benefit obligation	349,311	295,942
Fair value of plan assets	304,084	255,115
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	322,594	268,887
Accumulated benefit obligation	322,594	268,887
Fair value of plan assets	304,084	255,115
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	29,978	31,967
Accumulated benefit obligation	26,717	27,055
Fair value of plan assets	$ 0	$ 0