Other (Income) Expense Foreign Currency Gain Loss by Currency (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Foreign Currency Transaction Gain (Loss), before Tax	$ 4,507	$ 4,230	$ 4,339
AustralianDollar [Member]
Foreign Currency Transaction Gain (Loss), before Tax	238	289	432
British Pound [Member]
Foreign Currency Transaction Gain (Loss), before Tax	434	1,132	(49)
Canadian Dollar [Member]
Foreign Currency Transaction Gain (Loss), before Tax	1,848	1,886	1,456
Euro [Member]
Foreign Currency Transaction Gain (Loss), before Tax	(908)	(1,537)	848
Malaysian Ringgit [Member]
Foreign Currency Transaction Gain (Loss), before Tax	545	278	421
Mexican Peso [Member]
Foreign Currency Transaction Gain (Loss), before Tax	414	284	156
Nigerian Naira [Member]
Foreign Currency Transaction Gain (Loss), before Tax	630	432	94
Other Currencies Net [Member]
Foreign Currency Transaction Gain (Loss), before Tax	$ 1,306	$ 1,466	$ 981