v3.26.3
Fair Value Measurement - Summary of Changes in Fair Value of Level 3 Assets By Investment Type (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Net Amortization of Premium/Discount $ 2,137 $ 2,354
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 887,532 577,192
Purchases [1] 188,644 246,767
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   19
Net Change in Unrealized Appreciation (Depreciation) (6,052) (500)
Sales and Settlements [1] (92,653) (76,344)
Net Amortization of Premium/Discount 2,130 2,277
Ending Balance $ 979,601 $ 749,411
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments
Net Change in Unrealized Appreciation (Depreciation) for assets still held $ (5,888) $ (827)
Level 3 | Common Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 1,397 2,309
Net Change in Unrealized Appreciation (Depreciation) 801 (495)
Ending Balance 2,198 1,814
Net Change in Unrealized Appreciation (Depreciation) for assets still held 801 (496)
Level 3 | Preferred Stock    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Purchases [1] 101  
Net Change in Unrealized Appreciation (Depreciation) 4  
Ending Balance 105  
Net Change in Unrealized Appreciation (Depreciation) for assets still held 4  
1st Lien/Senior Secured Debt | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 830,824 535,247
Purchases [1] 172,118 241,306
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings   19
Net Change in Unrealized Appreciation (Depreciation) (6,680) (120)
Sales and Settlements [1] (85,530) (76,344)
Net Amortization of Premium/Discount 2,009 2,200
Ending Balance 912,741 702,308
Net Change in Unrealized Appreciation (Depreciation) for assets still held (6,541) (447)
1st Lien/Last-Out Unitranche | Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Beginning Balance 55,311 39,636
Purchases [1] 16,425 5,461
Net Change in Unrealized Appreciation (Depreciation) (177) 115
Sales and Settlements [1] (7,123)  
Net Amortization of Premium/Discount 121 77
Ending Balance 64,557 45,289
Net Change in Unrealized Appreciation (Depreciation) for assets still held $ (152) $ 116
[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.