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]
Change in pension and postretirement benefit plans, tax	$ 2,977	$ 4,659	$ 9,994	$ 13,976
Change in unrealized gain on hedges, tax		$ 653	$ 1,679	$ 1,901