Accumulated Other Comprehensive Loss (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Components of Other Comprehensive Loss
Balance at the beginning of the year			$ (48,129)
Other comprehensive income (loss) before reclassifications			4,071
Amounts reclassified from Accumulated Other Comprehensive Loss			115
Total Other Comprehensive Income (Loss), net of tax	$ 427	$ (5,243)	4,186	$ (11,165)
Balance at the end of the period	(43,943)		(43,943)
Foreign Currency Translation Adjustments
Components of Other Comprehensive Loss
Balance at the beginning of the year			(44,585)
Other comprehensive income (loss) before reclassifications			4,395
Amounts reclassified from Accumulated Other Comprehensive Loss			0
Total Other Comprehensive Income (Loss), net of tax			4,395
Balance at the end of the period	(40,190)		(40,190)
Pension and Post Retirement Benefits
Components of Other Comprehensive Loss
Balance at the beginning of the year			(3,647)
Other comprehensive income (loss) before reclassifications			0
Amounts reclassified from Accumulated Other Comprehensive Loss			38
Total Other Comprehensive Income (Loss), net of tax			38
Balance at the end of the period	(3,609)		(3,609)
Cash Flow Hedge
Components of Other Comprehensive Loss
Balance at the beginning of the year			103
Other comprehensive income (loss) before reclassifications			(324)
Amounts reclassified from Accumulated Other Comprehensive Loss			77
Total Other Comprehensive Income (Loss), net of tax			(247)
Balance at the end of the period	$ (144)		$ (144)