Annual report pursuant to Section 13 and 15(d)

Our Portfolio - Equity Method Investments (Details)

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Our Portfolio - Equity Method Investments (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2021
USD ($)
equity_investment
Dec. 31, 2020
USD ($)
Schedule of Equity Method Investments [Line Items]    
Carrying Value $ 1,759,651 $ 1,279,651
Jupiter Equity Holdings, LLC    
Schedule of Equity Method Investments [Line Items]    
Carrying Value 540,000  
Lighthouse Partnerships    
Schedule of Equity Method Investments [Line Items]    
Carrying Value $ 390,000  
Number of partnership interests | equity_investment 3  
University of Iowa Energy Collaborative Holdings LLC    
Schedule of Equity Method Investments [Line Items]    
Carrying Value $ 123,000  
Other investees    
Schedule of Equity Method Investments [Line Items]    
Carrying Value $ 707,000