Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 4,978	$ 2,802
Foreign currency translation adjustment	1,071	207
Deferred gain on available for sale securities	226	65
Current period cash flow hedging activity, net of $86 and $680 tax benefit in the three months ended March 31, 2017 and March 31, 2016, respectively.	(239)	(1,367)
Reclassification of hedging activities into earnings, net of $12 and $61 tax benefit in the three months ended March 31, 2017 and March 31, 2016, respectively.	6	75
Reclassification of pension and postretirement adjustments into earnings, net of $50 and $99 tax benefit in the three months ended March 31, 2017 and March 31, 2016, respectively.	176	149
Total other comprehensive income (loss)	1,240	(871)
Comprehensive income	$ 6,218	$ 1,931