Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 3,116	$ (275)	$ 5,918	$ 752
Foreign currency translation adjustment	(1,025)	(339)	(818)	(1,162)
Deferred gain (loss) on available for sale securities	99	(14)	164	24
Current period cash flow hedging activity, net of $308 and $988 tax benefit in the three and six months ended June 30, 2016, respectively, and $50 and $370 tax benefit in the three and six months ended June 30, 2015, respectively.	(514)	(63)	(1,881)	(658)
Reclassification of hedging activities into earnings, net of $44 and $105 tax benefit in the three and six months ended June 30, 2016 and $38 and $137 tax benefit in the three and six months ended June 30, 2015, respectively.	33	89	108	274
Reclassification of pension and postretirement adjustments into earnings, net of $84 and $183 tax benefit in the three and six months ended June 30, 2016 and net of $95 and $203 tax benefit in the three and six months ended June 30, 2015, respectively.	153	166	302	425
Total other comprehensive income (loss)	(1,254)	(161)	(2,125)	(1,097)
Comprehensive income (loss)	$ 1,862	$ (436)	$ 3,793	$ (345)