Other (Income) Expense Foreign Currency Gain Loss by Currency (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Foreign Currency Transaction Gain (Loss), before Tax	$ 4,230	$ 4,339	$ 142
AustralianDollar [Member]
Foreign Currency Transaction Gain (Loss), before Tax	289	432	30
British Pound [Member]
Foreign Currency Transaction Gain (Loss), before Tax	1,132	(49)	(41)
Canadian Dollar [Member]
Foreign Currency Transaction Gain (Loss), before Tax	1,886	1,456	(415)
Euro [Member]
Foreign Currency Transaction Gain (Loss), before Tax	(1,537)	848	(62)
Malaysian Ringgit [Member]
Foreign Currency Transaction Gain (Loss), before Tax	278	421	70
Mexican Peso [Member]
Foreign Currency Transaction Gain (Loss), before Tax	284	156	(87)
Nigerian Naira [Member]
Foreign Currency Transaction Gain (Loss), before Tax	432	94	11
Other Currencies Net [Member]
Foreign Currency Transaction Gain (Loss), before Tax	$ 1,466	$ 981	$ 636