Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (275)	$ (3,624)	$ 752	$ (5,148)
Foreign currency translation adjustment	(339)	258	(1,162)	84
Deferred gain (loss) on available for sale securities	(14)	174	24	237
Current period cash flow hedging activity, net of $50 and $370 tax benefit in the three and six months ended June 30, 2015, respectively, and $583 and $808 tax benefit in the three and six months ended June 30, 2014, respectively.	(63)	(1,043)	(658)	(1,450)
Reclassification of hedging activities into earnings, net of $38 and $137 tax benefit in the three and six months ended June 30, 2015, respectively, and $91 and $187 tax benefit in the three and six months ended June 30, 2014, respectively.	89	173	274	353
Reclassification of pension and postretirement adjustments into earnings, net of $95 and $203 tax benefit in the three and six months ended June 30, 2015, respectively, and $77 and $160 tax benefit in the three and six months ended June 30, 2014, respectively.	166	115	425	273
Total other comprehensive loss	(161)	(323)	(1,097)	(503)
Comprehensive loss	$ (436)	$ (3,947)	$ (345)	$ (5,651)