Annual report pursuant to Section 13 and 15(d)

Credit facilities and commercial paper notes - Additional Information (Details)

v3.22.4
Credit facilities and commercial paper notes - Additional Information (Details)
1 Months Ended 12 Months Ended
Feb. 28, 2022
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2022
USD ($)
debt_instrument
Feb. 28, 2021
USD ($)
Line of Credit Facility [Line Items]        
Unamortized debt issuance costs (less than)   $ 10,000,000 $ 9,000,000  
Outstanding balance   100,473,000 $ 50,698,000  
Credit Facilities        
Line of Credit Facility [Line Items]        
Number of revolving credit facilities | debt_instrument     2  
Unamortized issuance costs     $ 1,000,000  
Default underlying financings (more than)     50.00%  
Credit Facilities | LIBOR        
Line of Credit Facility [Line Items]        
Default interest rate (in percent)     2.00%  
Credit Facilities | Rep-Based Facility        
Line of Credit Facility [Line Items]        
Maximum outstanding amount     $ 100,000,000  
Availability fee percentage     0.60%  
Outstanding balance     $ 0  
Credit Facilities | Rep-Based Facility | U.S. Federal Government        
Line of Credit Facility [Line Items]        
Applicable valuation percentages     85.00%  
Credit Facilities | Rep-Based Facility | Institutional        
Line of Credit Facility [Line Items]        
Applicable valuation percentages     80.00%  
Credit Facilities | Rep-Based Facility | LIBOR        
Line of Credit Facility [Line Items]        
Basis spread on variable rate     1.40%  
Fixed interest rate (in percent)     1.85%  
Credit Facilities | Rep-Based Facility | Federal Funds Rate        
Line of Credit Facility [Line Items]        
Basis spread on variable rate     0.40%  
Fixed interest rate (in percent)     0.85%  
Credit Facilities | Approval-Based Facility        
Line of Credit Facility [Line Items]        
Maximum outstanding amount     $ 200,000,000  
Outstanding balance     $ 51,000,000  
Credit Facilities | Approval-Based Facility | Certain Approved Existing Financing        
Line of Credit Facility [Line Items]        
Applicable valuation percentages     85.00%  
Credit Facilities | Approval-Based Facility | Others as Prescribed by Administrative Agent        
Line of Credit Facility [Line Items]        
Applicable valuation percentages     67.00%  
Credit Facilities | Approval-Based Facility | LIBOR        
Line of Credit Facility [Line Items]        
Basis spread on variable rate     1.50%  
Fixed interest rate (in percent)     2.00%  
Credit Facilities | Approval-Based Facility | Federal Funds Rate        
Line of Credit Facility [Line Items]        
Basis spread on variable rate     0.50%  
Fixed interest rate (in percent)     1.00%  
Credit Facilities | Unsecured Credit Facility        
Line of Credit Facility [Line Items]        
Maximum outstanding amount $ 600,000,000     $ 400,000,000
Outstanding credit facility     $ 0  
Unamortized debt issuance costs (less than)     3,000,000  
Term loan fee (in percent) 1.875%      
Credit Facilities | Unsecured Credit Facility | Prime Rate        
Line of Credit Facility [Line Items]        
Basis spread on variable rate 0.875%      
Credit Facilities | Unsecured Credit Facility | Secured Overnight Financing Rate SOFR        
Line of Credit Facility [Line Items]        
Basis spread on variable rate 1.875%      
Commercial Paper | CarbonCount© Green Commercial Paper Note Program        
Line of Credit Facility [Line Items]        
Maximum outstanding amount   $ 100,000,000    
Credit facility remaining no of days   397 days    
Outstanding balance     0  
Broker fee percent   0.0010    
Unamortized financing costs     $ 0  
Letter of Credit | CarbonCount© Green Commercial Paper Note Program        
Line of Credit Facility [Line Items]        
Maximum outstanding amount   $ 100,000,000    
Percentage of drawn letter of credit   0.0095    
Unused letter of credit capacity percentage   0.40%    
Reduced percentage of letter of credit Fee   0.0005    
Line of Credit | Unsecured Credit Facility | Secured Overnight Financing Rate SOFR | Unsecured Debt        
Line of Credit Facility [Line Items]        
Variable rate, maximum downward adjustment (in percent) 0.10%