Annual report pursuant to Section 13 and 15(d)

Our Portfolio - Schedule of Carrying Value, Expected Loan Funding Commitments, and Allowance by Type of Receivable (Details)

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Our Portfolio - Schedule of Carrying Value, Expected Loan Funding Commitments, and Allowance by Type of Receivable (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2020
Financing Receivable, Credit Quality Indicator [Line Items]      
Gross Carrying Value $ 1,460,000 $ 1,250,000  
Loan Funding Commitments 184,000 282,000  
Allowance 36,000 36,000  
Loans 1,424,000    
Equity method investments 1,759,651 1,279,651  
Equity method investments, receivables, real estate and investments 3,580,000    
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at beginning of period 36,000    
Balance at end of period 36,000 36,000  
Adoption of ASU 2016-13, net of tax effect      
Financing Receivable, Credit Quality Indicator [Line Items]      
Allowance     $ 17,000
3      
Financing Receivable, Credit Quality Indicator [Line Items]      
Allowance 8,000    
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at end of period 8,000    
Equity Method Investee      
Financing Receivable, Credit Quality Indicator [Line Items]      
Equity method investments 108,000    
Commercial receivables      
Financing Receivable, Credit Quality Indicator [Line Items]      
Gross Carrying Value 1,335,000 1,002,000  
Loan Funding Commitments 184,000 282,000  
Allowance 36,000 36,000  
Loans 1,298,529 965,452  
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at beginning of period 36,000 26,000  
Provision for loss on receivables 0 10,000  
Balance at end of period 36,000 36,000  
Commercial receivables | 2      
Financing Receivable, Credit Quality Indicator [Line Items]      
Gross Carrying Value 11,000    
Allowance 3,000    
Loans 8,000    
Equity method investments 34,000    
Equity method investments, receivables, real estate and investments 42,000    
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at end of period 3,000    
Commercial receivables | 3      
Financing Receivable, Credit Quality Indicator [Line Items]      
Gross Carrying Value 8,000    
Allowance 8,000    
Loans 0    
Equity method investments 0    
Equity method investments, receivables, real estate and investments 0    
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at end of period 8,000    
Commercial receivables | 1      
Financing Receivable, Credit Quality Indicator [Line Items]      
Gross Carrying Value 1,316,000    
Allowance 25,000    
Loans 1,291,000    
Equity method investments 1,726,000    
Equity method investments, receivables, real estate and investments 3,402,000    
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at end of period 25,000    
Commercial receivables | Equity Method Investee      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans 684,000    
Government receivables      
Financing Receivable, Credit Quality Indicator [Line Items]      
Gross Carrying Value 125,000 248,000  
Loan Funding Commitments 0 0  
Allowance 0 0  
Loans 125,409 248,455  
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at beginning of period 0 0  
Provision for loss on receivables 0 0  
Balance at end of period 0 $ 0  
Government receivables | 1      
Financing Receivable, Credit Quality Indicator [Line Items]      
Gross Carrying Value 125,000    
Allowance 0    
Loans 125,000    
Equity method investments 0    
Equity method investments, receivables, real estate and investments 136,000    
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Balance at end of period 0    
Residential Solar Loan      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans 776,000    
Leasing Arrangement      
Financing Receivable, Credit Quality Indicator [Line Items]      
Equity method investments, receivables, real estate and investments 48,000    
U.S. Federal Government      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans 28,000    
State or local governments      
Financing Receivable, Credit Quality Indicator [Line Items]      
Loans $ 97,000