Accumulated Other Comprehensive Loss (Details 2) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Components of Other Comprehensive Loss
Balance at the beginning of the year	$ (49,923)
Other comprehensive income (loss) before reclassifications	2,293
Amounts reclassified from Accumulated Other Comprehensive Loss	53
Total Other Comprehensive Income, net of tax	2,346	$ 3,334
Balance at the end of the period	(47,577)
Foreign Currency Translation Adjustments
Components of Other Comprehensive Loss
Balance at the beginning of the year	(44,444)
Other comprehensive income (loss) before reclassifications	2,400
Amounts reclassified from Accumulated Other Comprehensive Loss	0
Total Other Comprehensive Income, net of tax	2,400
Balance at the end of the period	(42,044)
Pension and Post Retirement Benefits
Components of Other Comprehensive Loss
Balance at the beginning of the year	(5,391)
Other comprehensive income (loss) before reclassifications	0
Amounts reclassified from Accumulated Other Comprehensive Loss	(8)
Total Other Comprehensive Income, net of tax	(8)
Balance at the end of the period	(5,399)
Cash Flow Hedge
Components of Other Comprehensive Loss
Balance at the beginning of the year	(88)
Other comprehensive income (loss) before reclassifications	(107)
Amounts reclassified from Accumulated Other Comprehensive Loss	61
Total Other Comprehensive Income, net of tax	(46)
Balance at the end of the period	$ (134)