Notes Payable, Long Term Debt and Other Obligations Non Cash Interest Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Debt Disclosure [Abstract]
Amortization of debt discount	$ 4,779	$ 2,709	$ 12,220	$ 7,551
Amortization of deferred finance costs	606	1,123	2,067	4,004
Accelerated interest expense on 3.875% Variable Interest Senior Convertible Debentures converted	7,072	0	14,960	1,217
Non-cash Interest Expense	$ 12,457	$ 3,832	$ 29,247	$ 12,772