Pension and Postretirement Benefits (Change in Accumulated Other Comprehensive Loss) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
U.S Defined Benefit Plans
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Balance —	$ (55,110)	$ (90,270)	$ (98,745)
Amortization of net loss	5,277	8,919	7,605
Amortization of prior service cost (benefit)	297	(54)	(773)
Net (loss) gain arising during the year	(17,367)	26,312	1,643
Settlement gain	0	(17)	0
Balance —	(66,903)	(55,110)	(90,270)
Non-U.S Defined Benefit Plans
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Balance —	(78,863)	(76,197)	(43,110)
Amortization of net loss	5,262	4,999	2,985
Net (loss) gain arising during the year	(3,709)	(6,091)	(33,692)
Settlement loss	216	93	100
Prior service benefit arising during the year	141	137	32
Currency translation impact and other	7,355	(1,804)	(2,512)
Balance —	(69,598)	(78,863)	(76,197)
Postretirement Medical Benefits
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax [Abstract]
Balance —	4,445	4,710	7,081
Amortization of net loss	(764)	(800)	(963)
Amortization of prior service cost (benefit)	(1,464)	0	(26)
Net (loss) gain arising during the year	(1,114)	535	(1,382)
Balance —	$ 1,103	$ 4,445	$ 4,710