CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ (34,492)	$ 31,936	$ (83,936)	$ 72,552
Other comprehensive income (loss), net of tax:
Change in pension and postretirement benefit plans, (net of tax expense: $2,883 and $5,765, and $2,422 and $4,844, for the three and six months ended June 30, 2013 and 2012, respectively)	4,658	3,897	9,317	7,795
Change in unrealized gain (loss) on hedges, (net of tax expense (benefit): $324 and $667, and $(1,235) and $(2,042), for the three and six months ended June 30, 2013 and 2012, respectively)	526	(1,987)	1,248	(3,270)
Change in foreign currency translation adjustment	(1,461)	(3,209)	(17,086)	(790)
Change in unrealized gain (loss) on investments, net of tax	(1)		43	(369)
Total other comprehensive income (loss), net of tax	3,722	(1,299)	(6,478)	3,366
Total comprehensive income (loss)	$ (30,770)	$ 30,637	$ (90,414)	$ 75,918