Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 3,141	$ 7,699	$ 3,893	$ 2,551
Foreign currency translation adjustment	(1,190)	(740)	(2,352)	(656)
Deferred gain (loss) on available for sale securities	(229)	33	(205)	270
Current period cash flow hedging activity, net of $304 and $674 tax benefit in the three and nine months ended September 30, 2015, respectively, and $351 tax expense and $457 tax benefit in the three and nine months ended September 30, 2014, respectively.	(558)	590	(1,216)	(860)
Reclassification of hedging activities into earnings, net of $41 and $178 tax benefit in the three and nine months ended September 30, 2015, respectively, and $137 and $324 tax benefit in the three and nine months ended September 30, 2014, respectively.	89	249	363	602
Reclassification of pension and postretirement adjustments into earnings, net of $97 and $300 tax benefit in the three and nine months ended September 30, 2015, respectively, and $75 and $235 tax benefit in the three and nine months ended September 30, 2014, respectively.	216	180	641	453
Total other comprehensive income (loss)	(1,672)	312	(2,769)	(191)
Comprehensive income	$ 1,469	$ 8,011	$ 1,124	$ 2,360