Unaudited Condensed Consolidated Statements of Comprehensive Income (Loss) (Parenthetical) (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]
Current period cash flow hedging activity, tax expense (benefit)	$ 351	$ (88)	$ (457)	$ 344
Reclassification of hedging activities into earnings, tax benefit (expense)	(137)	24	(324)	(146)
Current period pension and postretirement plan adjustment, tax expense		3,497		3,497
Current period curtailment gain into earnings, tax expense	0	578	0	578
Reclassification of pension and postretirement adjustments into earnings, tax benefit	$ (75)	$ (109)	$ (235)	$ (517)