Pension (Contributions to Pension Plans) (Details) - Pension Plan - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Estimated contributions in 2019	$ 3,448
Employer contributions	3,197	$ 3,150
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Estimated contributions in 2019	138
Employer contributions	0	499
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Estimated contributions in 2019	3,310
Employer contributions	$ 3,197	$ 2,651