Income Tax (Details 5) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits	$ 194,260,000	$ 182,354,000	$ 221,040,000
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions	47,438,000	7,968,000	17,255,000
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions	0	0	(59,879,000)
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions	3,938,000	3,938,000	3,938,000
Unrecognized Tax Benefits, Decreases Resulting from Current Period Tax Positions	0	0	0
Unrecognized Tax Benefits	$ 245,636,000	$ 194,260,000	$ 182,354,000