Quarterly report pursuant to Section 13 or 15(d)

Credit facilities and commercial paper notes - Senior Credit Facilities (Details)

v3.21.2
Credit facilities and commercial paper notes - Senior Credit Facilities (Details)
 1 Months Ended 3 Months Ended 9 Months Ended
Apr. 30, 2021
USD ($)
Mar. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
facility
Feb. 28, 2021
USD ($)
Dec. 31, 2020
USD ($)
Line of Credit Facility [Line Items]          
Unamortized debt issuance costs     $ 11,000,000   $ 12,000,000
Credit Facilities          
Line of Credit Facility [Line Items]          
Number of revolving credit facilities | facility     2    
Unamortized issuance costs     $ 2,000,000    
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]          
Principal amount   $ 100,000,000   $ 250,000,000  
Loss on modification   $ 1,500,000      
Availability fee percentage     0.60%    
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 (in percent)     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 (in percent)     0.40%    
Fixed interest rate (in percent)     0.85%    
Credit Facilities | Approval-Based Facility          
Line of Credit Facility [Line Items]          
Principal amount     $ 200,000,000    
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 (in percent)     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 (in percent)     0.50%    
Fixed interest rate (in percent)     1.00%    
Credit Facilities | Unsecured Revolver          
Line of Credit Facility [Line Items]          
Principal amount $ 400,000,000     $ 50,000,000  
Fixed interest rate (in percent)     2.325%    
Outstanding credit facility     $ 25,000,000    
Unamortized debt issuance costs     $ 1,000,000    
Term loan fee (in percent) 2.25%        
Long-term Debt, Term 364 days        
Credit Facilities | Unsecured Revolver | LIBOR          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (in percent) 2.25%        
Variable rate, maximum downward adjustment (in percent) 0.05%        
Credit Facilities | Unsecured Revolver | Prime Rate          
Line of Credit Facility [Line Items]          
Basis spread on variable rate (in percent) 1.25%