Pension (Pre-tax Amounts Recognized in Accumulated Other Comprehensive Loss) (Details) - Pension Plan - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	$ 114,200	$ 110,606
Prior service cost (credit)	(2,447)	(2,635)
Total cost in AOCI	111,753	107,971
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	105,468	98,228
Prior service cost (credit)	0	1
Total cost in AOCI	105,468	98,229
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss	8,732	12,378
Prior service cost (credit)	(2,447)	(2,636)
Total cost in AOCI	$ 6,285	$ 9,742