Outstanding Loans and Security Agreements - Non-recourse Debt Facilities (Details) - USD ($) $ in Thousands			3 Months Ended		6 Months Ended
		Jun. 14, 2022	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ 4,233	$ 0	$ 4,233	$ 0
Cash and cash equivalents	[1]		235,638		235,638		$ 396,035
Senior Secured Notes | 3.04% Senior Secured Notes due June 2031
Debt Instrument [Line Items]
Debt minimum debt service reserves required			8,000		8,000		$ 8,000
Interest rate percentage							3.04%
Senior Secured Notes | 7.5% Term Loan due September 2028
Debt Instrument [Line Items]
Debt minimum debt service reserves required			0		0		$ 3,600
Senior Secured Notes | 6.07% Senior Secured Notes due March 2030
Debt Instrument [Line Items]
Debt minimum debt service reserves required			$ 9,300		$ 9,300		$ 9,100
Interest rate percentage			6.07%		6.07%		6.07%
Term Loan | 7.5% Term Loan due September 2028
Debt Instrument [Line Items]
Interest rate percentage			7.50%		7.50%		7.50%
PPA Company IIIA | Senior Secured Notes | 7.5% Term Loan due September 2028
Debt Instrument [Line Items]
Repayments of debt		$ 30,200
Accrued interest		400
Loss on extinguishment of debt		$ 4,200
Cash and cash equivalents			$ 3,600		$ 3,600

[1] We have variable interest entities, which represent a portion of the consolidated balances recorded within these financial statement line items in the condensed consolidated balance sheets (see Note 11 - Portfolio Financings).