Defined Benefit Pension Plans Level 3 Plan Asset Rollforward (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	$ 10,761	$ 11,680
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	10,035	10,834	7,658
Defined Benefit Plan, Transfers Between Measurement Levels	172	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(1,343)	(87)
Defined Benefit Plan, Purchases, Sales, and Settlements	(81)	3,155
Defined Benefit Plan, Actual Return on Plan Assets	453	108
Securities (Assets) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,595	2,574
Securities (Assets) [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	2,595	2,574	0
Defined Benefit Plan, Transfers Between Measurement Levels	172	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(365)	(406)
Defined Benefit Plan, Purchases, Sales, and Settlements	(106)	3,050
Defined Benefit Plan, Actual Return on Plan Assets	320	(70)
Guaranteed Insurance Benefit Type [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7,440	8,260
Guaranteed Insurance Benefit Type [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Fair Value of Plan Assets	7,440	8,260	7,658
Defined Benefit Plan, Transfers Between Measurement Levels	0	0
Defined Benefit Plan, Foreign Currency Exchange Rate Changes, Plan Assets	(978)	319
Defined Benefit Plan, Purchases, Sales, and Settlements	25	105
Defined Benefit Plan, Actual Return on Plan Assets	$ 133	$ 178