Notes Payable, Long-Term Debt and Other Obligations (Schedule of Maturities) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
2020 Principal	$ 214,947
2020 Unamortized Discount	5,276
2020 Net	209,671
2021 Principal	10,026
2021 Unamortized Discount	0
2021 Net	10,026
2022 Principal	10,045
2022 Unamortized Discount	0
2022 Net	10,045
2023 Principal	29
2023 Unamortized Discount	0
2023 Net	29
2024 Principal	8
2024 Unamortized Discount	0
2024 Net	8
Thereafter Principal	1,405,000
Thereafter Unamortized Discount	3,392
Thereafter Net	1,401,608
Notes payable, long-term debt and other obligations	1,640,055
Unamortized Discount/ (Premium)	8,668
Total notes payable, long-term debt and other obligations	$ 1,631,387	$ 1,666,445