v3.26.1
Fair Value Measurement - Summary of Changes in Fair Value of Level 3 Assets By Investment Type (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Net Amortization of Premium/Discount $ 4,044 $ 5,697
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 1,534,345 2,071,217
Purchases [1] 30,976 60,518
Net Realized Gain (Loss) (40) (9,212)
Net Change in Unrealized Appreciation (Depreciation) (36,218) 1,058
Sales and Settlements [1] (163,872) (360,177)
Net Amortization of Premium/Discount 4,044 5,675
Ending Balance 1,369,235 1,769,079
Net Change in Unrealized Appreciation (Depreciation) for assets still held $ (40,243) $ (5,909)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Investments Gain (Loss) on Investments
Level 3 | 1st Lien/Senior Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance $ 1,468,487 $ 1,976,683
Purchases [1] 30,879 49,936
Net Realized Gain (Loss) (40) (9,212)
Net Change in Unrealized Appreciation (Depreciation) (31,190) 3,071
Sales and Settlements [1] (163,872) (351,551)
Net Amortization of Premium/Discount 4,002 5,483
Ending Balance 1,308,266 1,674,410
Net Change in Unrealized Appreciation (Depreciation) for assets still held (35,215) (3,833)
Level 3 | 1st Lien/Last-Out Unitranche    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 29,474 22,642
Purchases [1] 97 7,827
Net Change in Unrealized Appreciation (Depreciation) (2,031) 248
Net Amortization of Premium/Discount 42 39
Ending Balance 27,582 30,756
Net Change in Unrealized Appreciation (Depreciation) for assets still held (2,030) 248
Level 3 | 2nd Lien/Senior Secured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 2,526 3,587
Net Change in Unrealized Appreciation (Depreciation) (1,503) 63
Ending Balance 1,023 3,650
Net Change in Unrealized Appreciation (Depreciation) for assets still held (1,503) 63
Level 3 | Unsecured Debt    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 6,654 14,969
Net Change in Unrealized Appreciation (Depreciation)   158
Sales and Settlements [1]   (8,626)
Net Amortization of Premium/Discount   153
Ending Balance 6,654 6,654
Net Change in Unrealized Appreciation (Depreciation) for assets still held (1) 95
Level 3 | Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 23,007 34,482
Net Change in Unrealized Appreciation (Depreciation) (1,870) 1,494
Ending Balance 21,137 35,976
Net Change in Unrealized Appreciation (Depreciation) for assets still held (1,870) 1,494
Level 3 | Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 3,974 18,475
Purchases [1]   2,755
Net Change in Unrealized Appreciation (Depreciation) 233 (3,955)
Ending Balance 4,207 17,275
Net Change in Unrealized Appreciation (Depreciation) for assets still held 233 (3,955)
Level 3 | Warrants    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 223 379
Net Change in Unrealized Appreciation (Depreciation) 143 (21)
Ending Balance 366 358
Net Change in Unrealized Appreciation (Depreciation) for assets still held $ 143 $ (21)
[1] Purchases may include PIK, securities received in corporate actions and restructurings. Sales and Settlements may include securities delivered in corporate actions and restructuring of investments.