Notes Payable, Long-Term Debt and Other Obligations Non Cash Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Debt Instrument [Line Items]
Amortization of debt discount, net	$ 6,213	$ 7,563	$ 11,840	$ 20,019
Amortization of deferred finance costs	1,022	1,055	1,988	1,763
Non-cash Interest Expense	7,235	9,057	13,828	25,900
Convertible Debt [Member] | 6.75% Variable Interest Senior Convertible Note due 2014 - Vector
Debt Instrument [Line Items]
Acceleration of interest expense	0	0	0	3,679
Convertible Debt [Member] | 6.75% Variable Interest Senior Convertible Exchange Notes
Debt Instrument [Line Items]
Acceleration of interest expense	$ 0	$ 439	$ 0	$ 439