Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - 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]
Current period cash flow hedging activity, tax expense (benefit)	$ (304)	$ 351	$ (674)	$ (457)
Reclassification of hedging activities into earnings, tax benefit (expense)	(41)	(137)	(178)	(324)
Reclassification of pension and postretirement adjustments into earnings, tax benefit (expense)	$ (97)	$ (75)	$ (300)	$ (235)