Nonpension Postretirement Benefits (Net Benefit Costs) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Nonpension Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost (benefits earned during the period)	$ 1,192	$ 1,472	$ 1,361
Interest cost on projected benefit obligation	2,732	3,530	3,754
Amortization of unrecognized:
Prior service cost	140	422	422
Loss (gain)	857	915	1,090
Pension expense	4,921	6,339	6,627
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost (benefits earned during the period)	1,190	1,470	1,359
Interest cost on projected benefit obligation	2,622	3,426	3,632
Amortization of unrecognized:
Prior service cost	140	422	422
Loss (gain)	857	916	1,107
Pension expense	4,809	6,234	6,520
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost (benefits earned during the period)	2	2	2
Interest cost on projected benefit obligation	110	104	122
Amortization of unrecognized:
Prior service cost	0	0	0
Loss (gain)	0	(1)	(17)
Pension expense	$ 112	$ 105	$ 107