Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 7,699	$ 12,325	$ 2,551	$ 21,894
Foreign currency translation adjustment	(740)	(21)	(656)	(85)
Deferred gain on available for sale securities	33	151	270	443
Current period cash flow hedging activity, net of $351 tax expense and $457 tax benefit in the three and nine months ended September 30, 2014, respectively, and $88 tax benefit and $344 tax expense in the three and nine months ended September 30, 2013, respectively.	590	(124)	(860)	573
Reclassification of hedging activities into earnings, net of $137 and $324 tax benefit in the three and nine months ended September 30, 2014, respectively, and $24 tax expense and $146 tax benefit in the three and nine months ended September 30, 2013, respectively.	249	(38)	602	235
Current period pension and postretirement plan adjustment, net of $3,497 tax expense in both the three and nine months ended September 30, 2013, respectively.	0	3,652	0	3,652
Current period curtailment gain into earnings, net of $578 tax expense in both the three and nine months ended September 30, 2013, respectively	0	(1,123)	0	(1,123)
Reclassification of pension and postretirement adjustments into earnings, net of $75 and $235 tax benefit in the three and nine months ended September 30, 2014, respectively, and $109 and $517 tax benefit in the three and nine months ended September 30, 2013, respectively.	180	254	453	1,059
Total other comprehensive income (loss)	312	2,751	(191)	4,754
Comprehensive income	$ 8,011	$ 15,076	$ 2,360	$ 26,648