Pension and Other Postretirement Benefits - Level 3 Asset Rollforward (Details) (Fair Value Inputs Level 3 [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets at Beginning of Year	$ 51,534	$ 47,160
Purchases	3,182	2,997
Settlements	(1,607)	(1,466)
Unrealized Gains	2,097	1,864
Translation Difference	2,403	979
Fair Value of Plan Assets at End of Year	57,609	51,534
Insurance Contract [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets at Beginning of Year	51,146	46,797
Purchases	3,182	2,997
Settlements	(1,607)	(1,466)
Unrealized Gains	2,061	1,854
Translation Difference	2,393	964
Fair Value of Plan Assets at End of Year	57,175	51,146
Real Estate Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets at Beginning of Year	388	363
Purchases	0	0
Settlements	0	0
Unrealized Gains	36	10
Translation Difference	10	15
Fair Value of Plan Assets at End of Year	$ 434	$ 388