v3.25.2
Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Assets by Investment Type (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of period $ 922,418 $ 114,847 $ 666,141 $ 52,566
Purchase of investments (including PIK, if any) 62,204 103,076 325,206 165,529
Proceeds from principal repayments and sales of investments (5,723)   (13,338) 0
Amortization of premium/accretion of discount, net 583 81 1,179 130
Receipt of paid-in-kind interest 467 112 978 112
Net change in unrealized appreciation (depreciation) on investments 745 23 528 (198)
Fair value, end of period 980,694 218,139 980,694 218,139
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held 745 23 528 (198)
First Lien Senior Secured Debt [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of period     665,741  
Purchase of investments (including PIK, if any)     304,859  
Proceeds from principal repayments and sales of investments     (13,338)  
Amortization of premium/accretion of discount, net     1,135  
Receipt of paid-in-kind interest     978  
Net change in unrealized appreciation (depreciation) on investments     605  
Fair value, end of period 959,980   959,980  
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held   23 605  
First Lien Senior Secured [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of period 901,723 114,847   52,566
Purchase of investments (including PIK, if any) 62,204 103,076   165,529
Proceeds from principal repayments and sales of investments (5,723)      
Amortization of premium/accretion of discount, net 564 81   130
Receipt of paid-in-kind interest 467 112   112
Net change in unrealized appreciation (depreciation) on investments 745 23   (198)
Fair value, end of period 959,980 $ 218,139 959,980 218,139
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held 745     $ (198)
First Lien Last Out Unitranche Debt [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of period 20,347      
Purchase of investments (including PIK, if any)     20,347  
Amortization of premium/accretion of discount, net 19   44  
Net change in unrealized appreciation (depreciation) on investments (24)   (49)  
Fair value, end of period 20,342   20,342  
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held (24)   (49)  
Common Equity [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of period 348   400  
Net change in unrealized appreciation (depreciation) on investments 24   (28)  
Fair value, end of period 372   372  
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held $ 24   $ (28)