Fair Value of Assets and Liabilities - Carrying Value and Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets:
Cash and cash equivalents	$ 95,073	$ 506,491	$ 283,524
Liabilities:
Non-recourse debt	2,046,006
Carrying Value
Assets:
Cash and cash equivalents	95,073	506,491
Restricted cash and investments	48,770	41,831
Liabilities:
Borrowings under exchange and senior credit facility	1,113,239	1,546,895
Carrying Value | Non-recourse debt
Liabilities:
Non-recourse debt		310,108
Fair Value
Assets:
Cash and cash equivalents	95,073	506,491
Restricted cash and investments	48,770	41,831
Liabilities:
Borrowings under exchange and senior credit facility	1,112,183	1,448,280
Fair Value | Non-recourse debt
Liabilities:
Non-recourse debt		310,108
Level 1 | Fair Value
Assets:
Cash and cash equivalents	95,073	506,491
Restricted cash and investments	48,770	41,831
Level 2 | Fair Value
Liabilities:
Borrowings under exchange and senior credit facility	1,112,183	1,448,280
Level 2 | Fair Value | Non-recourse debt
Liabilities:
Non-recourse debt		310,108
5.125% Senior Notes due 2023
Liabilities:
Non-recourse debt	125,700
5.125% Senior Notes due 2023 | Carrying Value
Liabilities:
Senior notes, fair value		259,275
5.125% Senior Notes due 2023 | Fair Value
Liabilities:
Senior notes, fair value		248,479
5.125% Senior Notes due 2023 | Level 2 | Fair Value
Liabilities:
Senior notes, fair value		248,479
5.875% Senior Notes due 2024
Liabilities:
Non-recourse debt	23,300
5.875% Senior Notes due 2024 | Carrying Value
Liabilities:
Senior notes, fair value	23,253	225,293
5.875% Senior Notes due 2024 | Fair Value
Liabilities:
Senior notes, fair value	22,997	199,522
5.875% Senior Notes due 2024 | Level 2 | Fair Value
Liabilities:
Senior notes, fair value	22,997	199,522
10.500% Public Second Lien Notes due 2028 | Carrying Value
Liabilities:
Senior notes, fair value	286,521
10.500% Public Second Lien Notes due 2028 | Fair Value
Liabilities:
Senior notes, fair value	291,610
10.500% Public Second Lien Notes due 2028 | Level 2 | Fair Value
Liabilities:
Senior notes, fair value	291,610
9.500% Private Second Lien Notes due 2028
Liabilities:
Senior notes, fair value	239,142
9.500% Private Second Lien Notes due 2028 | Fair Value
Liabilities:
Senior notes, fair value	232,627
9.500% Private Second Lien Notes due 2028 | Level 2 | Fair Value
Liabilities:
Senior notes, fair value	232,627
6.00% Senior Notes due 2026
Liabilities:
Senior notes, fair value	215,700
Non-recourse debt	110,900
6.00% Senior Notes due 2026 | Carrying Value
Liabilities:
Senior notes, fair value	110,858	350,000
6.00% Senior Notes due 2026 | Fair Value
Liabilities:
Senior notes, fair value	99,132	283,691
6.00% Senior Notes due 2026 | Level 2 | Fair Value
Liabilities:
Senior notes, fair value	99,132	283,691
6.50% Exchangeable Senior Notes due 2026 | Carrying Value
Liabilities:
Senior notes, fair value	230,000	230,000
6.50% Exchangeable Senior Notes due 2026 | Fair Value
Liabilities:
Senior notes, fair value	327,872	248,211
6.50% Exchangeable Senior Notes due 2026 | Level 2 | Fair Value
Liabilities:
Senior notes, fair value	$ 327,872	$ 248,211