Outstanding Loans and Security Agreements - Schedule of Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 498,728	$ 539,669
Current portion of debt	27,168	25,831
Net carrying value, long-term	462,093	500,899
Total	489,261	526,730
Notes | 10.25% Senior Secured Notes due March 2027
Debt Instrument [Line Items]
Unpaid Principal Balance	67,980	70,000
Current portion of debt	12,434	8,348
Net carrying value, long-term	54,690	60,620
Total	$ 67,124	$ 68,968
Interest rate percentage	10.25%	10.25%
Senior Secured Notes | 2.5% Green Convertible Senior Notes due August 2025
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 230,000	$ 230,000
Current portion of debt	0	0
Net carrying value, long-term	223,848	222,863
Total	$ 223,848	$ 222,863
Interest rate percentage	2.50%	2.50%
Senior Secured Notes | 3.04% Senior Secured Notes due June 30, 2031
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 129,061	$ 134,644
Current portion of debt	9,643	9,376
Net carrying value, long-term	117,586	123,255
Total	$ 127,229	132,631
Interest rate percentage	3.04%
Senior Secured Notes | 6.07% Senior Secured Notes due March 2030
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 71,687	73,955
Current portion of debt	5,091	4,671
Net carrying value, long-term	65,969	68,591
Total	$ 71,060	$ 73,262
Interest rate percentage	6.07%	6.07%
Recourse Debt
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 297,980	$ 300,000
Current portion of debt	12,434	8,348
Net carrying value, long-term	278,538	283,483
Total	$ 290,972	291,831
Term Loan | 7.5% Term Loan due September 2028
Debt Instrument [Line Items]
Unpaid Principal Balance		31,070
Current portion of debt		3,436
Net carrying value, long-term		25,570
Total		$ 29,006
Interest rate percentage	7.50%	7.50%
Non-recourse Debt
Debt Instrument [Line Items]
Unpaid Principal Balance	$ 200,748	$ 239,669
Current portion of debt	14,734	17,483
Net carrying value, long-term	183,555	217,416
Total	$ 198,289	$ 234,899