Income Taxes (Effective Tax Rate) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Abstract]
Benefit (provision) for income taxes at statutory rate					$ (35,289)	$ (62,932)	$ 118,337
Tax effect of foreign income (losses)					8,251	3,851	1,480
Expenses for which no federal tax benefit was recognized					(3,874)	(5,433)	(3,657)
Valuation allowances					95,072	61,921	(85,605)
State tax (provision) benefit, net of federal					(1,097)	(4,565)	(3,560)
Foreign tax					35,877	(4,071)	(2,485)
Change in unrecognized tax benefits					0	1,693	0
Other					1,121	1,189	2,336
Total benefit (provision) for income taxes	$ (70,624)	$ 32,300	$ (68,432)	$ 6,695	$ 100,061	$ (8,347)	$ 26,846