Convertible Debt and Notes Payable - Scheduled Maturities (Details) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020
Repayments on long-term and short-term borrowings
Convertible debt		$ 0	$ 80,808	[1]
Note payable		173,895	307,653
Term Loan		290,151	0
Other Notes Payable		13,340	72,505
Future minimum lease payments for finance lease obligations
2021		358
2022		1,238
2023		481
2024		82
2025		42
Thereafter		12
Subtotal		2,213
Finance Lease, Interest Payment on Liability	[2]	(96)
Finance lease obligations		2,117	$ 2,909
Senior Notes
Repayments on long-term and short-term borrowings
2021		6,703
2022		13,405
2023		13,405
2024		88,578
2025		7,750
Thereafter		158,125
Subtotal		287,966
Long-term Debt and Short-term Borrowings, Amount Representing Interest	[2]	114,071
Note payable		173,895
Term Loan
Repayments on long-term and short-term borrowings
2021		3,761
2022		15,068
2023		14,945
2024		14,823
2025		14,701
Thereafter		310,887
Subtotal		374,185
Long-term Debt and Short-term Borrowings, Amount Representing Interest	[2]	84,034
Term Loan		290,151
Notes Payable, Other Payables
Repayments on long-term and short-term borrowings
2021		931
2022		593
2023		12,593
2024		543
2025		0
Thereafter		0
Subtotal		14,660
Long-term Debt and Short-term Borrowings, Amount Representing Interest	[2]	1,320
Other Notes Payable		$ 13,340

[1] The carrying amount of the convertible debt includes an unamortized discount of $6.7 million as of December 31, 2020.

[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.