Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Financial Instruments - Additional Information (Details)

v3.23.1
Fair Value of Financial Instruments - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized Gain (Loss) on Investments $ 21,105 $ (36,742)  
2033 Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Current Price Per Par Value $ 23.96   $ 24.59
2031 Asset-Backed Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Current Price Per Par Value $ 0.940   $ 0.951
Debt | Unobservable Inputs Level 3 | Depreciation [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized Gain (Loss) on Investments $ (22,600)    
Debt | Unobservable Inputs Level 3 | Appreciation      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized Gain (Loss) on Investments   8,000  
Warrant Investment [Member] | Unobservable Inputs Level 3 | Depreciation [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized Gain (Loss) on Investments (600)    
Warrant Investment [Member] | Unobservable Inputs Level 3 | Appreciation      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized Gain (Loss) on Investments   300  
Common Stock Investment [Member] | Unobservable Inputs Level 3 | Appreciation      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized Gain (Loss) on Investments 5,600 2,200  
Preferred Stock Investment Member | Unobservable Inputs Level 3 | Depreciation [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Unrealized Gain (Loss) on Investments $ (1,100) $ (7,300)  
Underwriting | 2033 Notes      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Current Price Per Par Value $ 25.00