Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Tax expense (benefit) on current period cash flow hedging activity	$ (583)	$ 356	$ (808)	$ 432
Tax expense (benefit) on reclassification of hedging activities into earnings	(91)	(77)	(187)	(170)
Tax expense (benefit) reclassification of pension and postretirement into earnings	$ (77)	$ (264)	$ (160)	$ (408)