Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Additional Information (Details)

v3.23.3
Fair Value of Financial Instruments - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total net change in unrealized appreciation (depreciation) $ (46,240) $ (2,089) $ (6,277) $ (87,147)  
2033 Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Current price per par value (in dollars per share) $ 24.05   $ 24.05   $ 24.59
2031 Asset-Backed Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Current price per par value (in dollars per share) 0.930   $ 0.930   $ 0.951
Common Stock Investment | Unobservable Inputs (Level 3) | Appreciation          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total net change in unrealized appreciation (depreciation)     $ 10,700 9,500  
Preferred Stock Investments | Unobservable Inputs (Level 3) | Depreciation          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total net change in unrealized appreciation (depreciation)     (2,000) (23,200)  
Debt | Unobservable Inputs (Level 3) | Depreciation          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total net change in unrealized appreciation (depreciation)       (12,200)  
Debt | Unobservable Inputs (Level 3) | Appreciation          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total net change in unrealized appreciation (depreciation)     (16,900)    
Warrants | Unobservable Inputs (Level 3) | Depreciation          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Total net change in unrealized appreciation (depreciation)     $ (900) $ (13,400)  
Underwriting | 2033 Notes          
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]          
Current price per par value (in dollars per share) $ 25.00   $ 25.00