Notes Payable, Long-Term Debt and Other Obligations (Non-Cash Interest Expense and Loss on Extinguishment of Debt) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Amortization of debt discount, net	$ 13,426	$ 8,653	$ 25,262	$ 16,609
Amortization of debt issuance costs	2,233	1,401	4,233	2,569
Loss on extinguishment of 7.75% Senior Secured Notes	0	0	34,110	0
Non-cash Interest Expense	15,659	10,054	31,249	19,178
Senior Notes | 7.75% Senior Secured Notes due 2021 [Member]
Debt Instrument [Line Items]
Amortization of debt discount, net			1,754
Loss on extinguishment of 7.75% Senior Secured Notes	$ 0	$ 0	$ 1,754	$ 0