Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Investments - Schedule of Net Change in Unrealized Gains on Investments (Details)

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Fair Value of Investments - Schedule of Net Change in Unrealized Gains on Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Net change in unrealized gain (loss) $ 84,196 $ 23,186 $ (156,428) $ 113,616
First-lien senior secured debt investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Net change in unrealized gain (loss) 28,663 9,803 (97,931) 57,778
Second-lien senior secured debt investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Net change in unrealized gain (loss) (7,756) 1,350 (80,309) 18,539
Unsecured debt investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Net change in unrealized gain (loss) (14,345) (7,540) (39,287) (4,762)
Preferred equity investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Net change in unrealized gain (loss) 4,295 2,832 (14,675) 2,719
Common equity investments        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Net change in unrealized gain (loss) $ 73,339 $ 16,741 $ 75,774 $ 39,342