Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) - 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]
Current period cash flow hedging activity, tax expense (benefit)	$ (50)	$ (583)	$ (370)	$ (808)
Reclassification of hedging activities into earnings, tax benefit (expense)	(38)	(91)	(137)	(187)
Reclassification of pension and postretirement adjustments into earnings, tax benefit (expense)	$ (95)	$ (77)	$ (203)	$ (160)