Pension and Other Postretirement Benefit Plans Schedule of Amounts Recognized in Balance Sheet (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Other Assets, Noncurrent	$ 45,837	$ 39,580
Deferred Tax Assets, Net	22,685	13,388
Other Liabilities, Noncurrent	43,879	41,960
Accumulated Other Comprehensive Income (Loss), Net of Tax	(11,894)	(8,626)
Foreign Pension Plan, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Deferred Tax Assets, Net	2,953	2,488
Other Liabilities, Noncurrent	11,810	9,952
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (10,812)	$ (8,626)