Pension and Postretirement Benefits (Change in Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
U.S Defined Benefit Plans
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Balance —	$ (66,903)	$ (55,110)	$ (90,270)
Amortization of net loss	5,750	5,277	8,919
Amortization of prior service cost (benefit)	318	297	(54)
Net (loss) gain arising during the year	(812)	(17,367)	26,312
Settlement gain	0	0	(17)
Balance —	(61,647)	(66,903)	(55,110)
Non-U.S Defined Benefit Plans
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Balance —	(69,598)	(78,863)	(76,197)
Amortization of net loss	3,776	5,262	4,999
Net (loss) gain arising during the year	(2,673)	(3,709)	(6,091)
Settlement loss	390	216	93
Prior service (cost) benefit arising during the year	(14)	141	137
Currency translation impact and other	8,126	7,355	(1,804)
Balance —	(59,993)	(69,598)	(78,863)
Postretirement Medical Benefits
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Balance —	1,103	4,445	4,710
Amortization of net loss	(338)	(764)	(800)
Amortization of prior service cost (benefit)	76	(1,464)	0
Net (loss) gain arising during the year	338	(1,114)	535
Balance —	$ 1,179	$ 1,103	$ 4,445