CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Comprehensive (Loss) Income [Abstract]
Net Income (Loss)	$ (265,400)	$ 86,148	$ 103,500
Other comprehensive income:
Change in pension benefit plans assets/liabilities (net of tax benefit of $87, $7,759 and $1,891)	(1,610)	(7,041)	(3,053)
Change in fair value of investments (net of tax of $158, $153 and $0)	238	199	0
Foreign currency translation (net of tax of $226, $0 and $0)	382	(733)	230
Change in fair value of interest rate swap (net of tax benefit of $685)	(974)	0	0
Realized loss on sale of investments recorded in net loss (net of tax of $1,219)	2,005	0	0
Total other comprehensive income (loss)	41	(7,575)	(2,823)
TOTAL COMPREHENSIVE (LOSS) INCOME	$ (265,359)	$ 78,573	$ 100,677