Pension and Postretirement Benefits (Amounts Recognized in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
U.S Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Unrecognized net loss	$ (60,034)	$ (64,970)
Unrecognized prior service cost	(1,613)	(1,933)
Accumulated other comprehensive loss, net of tax	(61,647)	(66,903)	$ (55,110)	$ (90,270)
Non-U.S Defined Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Unrecognized net loss	(59,878)	(69,161)
Unrecognized prior service cost	(115)	(437)
Accumulated other comprehensive loss, net of tax	(59,993)	(69,598)	(78,863)	(76,197)
Postretirement Medical Benefits
Defined Benefit Plan Disclosure [Line Items]
Unrecognized net loss	2,344	2,788
Unrecognized prior service cost	(1,165)	(1,685)
Accumulated other comprehensive loss, net of tax	$ 1,179	$ 1,103	$ 4,445	$ 4,710