Notes Payable, Long-Term Debt and Other Obligations (Schedule of Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
2017 Principal	$ 39,509
2017 Unamortized Discount	0
2017 Net	39,509
2018 Principal	2,099
2018 Unamortized Discount	0
2018 Net	2,099
2019 Principal	231,261
2019 Unamortized Discount	108,479
2019 Net	122,782
2020 Principal	261,151
2020 Unamortized Discount	71,247
2020 Net	189,904
2021 Principal	835,001
2021 Unamortized Discount	(13,954)
2021 Net	848,955
Thereafter Principal	0
Thereafter Unamortized Discount	0
Thereafter Net	0
Notes payable, long-term debt and other obligations	1,369,021
Unamortized Discount/ (Premium)	165,772
Total notes payable, long-term debt and other obligations	$ 1,203,249	$ 895,168