CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ (49,444)	$ 40,616
Other comprehensive income (loss), net of tax:
Change in pension and postretirement benefit plans, (net of tax expense: $2,882 and $2,422, respectively)	4,659	3,898
Change in unrealized gain (loss) on hedges, (net of tax expense (benefit): $343 and $(807), respectively)	722	(1,283)
Change in foreign currency translation adjustment	(15,625)	2,419
Change in unrealized gain (loss) on investments	44	(369)
Total other comprehensive income (loss), net of tax	(10,200)	4,665
Total comprehensive income (loss)	$ (59,644)	$ 45,281