Notes Payable, Long Term Debt and Other Obligations Non Cash Interest Expense (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Debt Disclosure [Abstract]
Amortization of debt discount	$ 8,464	$ 4,004	$ 15,812	$ 7,441
Amortization of deferred finance costs	447	751	1,044	1,461
Loss on extinguishment of 11% Senior Secured Notes	0	0	3,638	0
Accelerated interest expense on 3.875% Variable Interest Senior Convertible Debentures converted	0	7,888	0	7,888
Non-cash Interest Expense	$ 8,911	$ 12,643	$ 20,494	$ 16,790