Accumulated Other Comprehensive Loss (Details) Part 2 - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Changes in components of Accumulated Other Comprehensive Loss
Balance at the beginning of the year	$ (48,129)
Other comprehensive income (loss) before reclassifications	3,380
Amounts reclassified from Accumulated Other Comprehensive Loss	(46)
Net current period other comprehensive income (loss)	3,334	$ (7,971)
Balance at the end of the period	(44,795)
Foreign Currency Translation Adjustments
Changes in components of Accumulated Other Comprehensive Loss
Balance at the beginning of the year	(44,585)
Other comprehensive income (loss) before reclassifications	3,602
Amounts reclassified from Accumulated Other Comprehensive Loss	0
Net current period other comprehensive income (loss)	3,602
Balance at the end of the period	(40,983)
Pension and Post Retirement Benefits
Changes in components of Accumulated 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	12
Net current period other comprehensive income (loss)	12
Balance at the end of the period	(3,635)
Cash Flow Hedge
Changes in components of Accumulated Other Comprehensive Loss
Balance at the beginning of the year	103
Other comprehensive income (loss) before reclassifications	(222)
Amounts reclassified from Accumulated Other Comprehensive Loss	(58)
Net current period other comprehensive income (loss)	(280)
Balance at the end of the period	$ (177)