Convertible Debt and Notes Payable - Scheduled Maturities (Details) - USD ($) $ in Thousands		Sep. 30, 2020	Dec. 31, 2019
Repayments on long-term and short-term borrowings
Convertible debt	[1]	$ 122,485	$ 118,688
Note payable		307,437	306,818
Other Notes Payable		73,253	2,516
Future minimum lease payments for finance lease obligations
2020		251
2021		1,396
2022		1,165
2023		411
2024		11
Thereafter		0
Subtotal		3,234
Capital Leases, Future Minimum Payments, Interest Included in Payments	[2]	202
Capital lease obligations		3,032	$ 3,937
Convertible Debt
Repayments on long-term and short-term borrowings
2020		2,025
2021		4,050
2022		139,050
2023		0
2024		0
Thereafter		0
Subtotal		145,125
Long-term Debt and Short-term Borrowings, Amount Representing Interest	[2]	22,640
Convertible debt		122,485
Senior Notes
Repayments on long-term and short-term borrowings
2020		7,300
2021		23,548
2022		23,548
2023		23,548
2024		98,721
Thereafter		334,304
Subtotal		510,969
Long-term Debt and Short-term Borrowings, Amount Representing Interest	[2]	203,532
Note payable		307,437
Insurance Note and Aircraft
Repayments on long-term and short-term borrowings
2020		933
2021		593
2022		593
2023		72,593
2024		543
Thereafter		0
Subtotal		75,255
Long-term Debt and Short-term Borrowings, Amount Representing Interest	[2]	2,002
Other Notes Payable		$ 73,253

[1] The carrying amount of the convertible debt includes an unamortized discount of $11.4 million and $14.9 million as of September 30, 2020 and December 31, 2019, respectively.

[2] Amount necessary to reduce net minimum payments to present value calculated at the Company's implicit rate at inception. This amount also includes capitalized debt costs and the unamortized discount on the Company's convertible debt.