Quarterly report pursuant to Section 13 or 15(d)

Credit facilities - Senior Credit Facilities (Details)

v3.21.2
Credit facilities - Senior Credit Facilities (Details)
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2021
USD ($)
Feb. 28, 2021
USD ($)
Mar. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
facility
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       $ 3,000,000  
Default underlying financings (more than)       50.00%  
Credit Facilities | LIBOR          
Line of Credit Facility [Line Items]          
Default interest rate       2.00%  
Credit Facilities | Rep-Based Facility          
Line of Credit Facility [Line Items]          
Principal amount   $ 250,000,000 $ 100,000,000    
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       1.40%  
Fixed interest rate       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       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       1.50%  
Fixed interest rate       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       1.00%  
Credit Facilities | Unsecured Revolver          
Line of Credit Facility [Line Items]          
Principal amount $ 400,000,000 $ 50,000,000      
Fixed interest rate       2.325%  
Short-term debt, terms 364-day        
Outstanding credit facility       $ 25,000,000  
Unamortized debt issuance costs       $ 2,000,000  
Term loan fee (in percent)   2.25%      
Credit Facilities | Unsecured Revolver | LIBOR          
Line of Credit Facility [Line Items]          
Basis spread on variable rate   2.25%      
Variable rate, maximum downward adjustment   0.05%      
Credit Facilities | Unsecured Revolver | Prime Rate          
Line of Credit Facility [Line Items]          
Basis spread on variable rate   1.25%