v3.25.1
Fair Value Measurements - Summary of Changes in Fair Value of Level 3 Assets by Investment Type (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value, beginning of period $ 666,141 $ 52,566
Purchase of investments (including PIK, if any) 263,002 62,453
Proceeds from principal repayments and sales of investments (7,615) 0
Amortization of premium/accretion of discount, net 596 49
Receipt of paid-in-kind interest 511  
Net change in unrealized appreciation (depreciation) on investments (217) (221)
Fair value, end of period 922,418 114,847
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held (217) (221)
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) 242,655  
Proceeds from principal repayments and sales of investments (7,615)  
Amortization of premium/accretion of discount, net 571  
Receipt of paid-in-kind interest 511  
Net change in unrealized appreciation (depreciation) on investments (140)  
Fair value, end of period 901,723  
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held (140)  
First Lien Last Out Unitranche Debt [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Purchase of investments (including PIK, if any) 20,347  
Amortization of premium/accretion of discount, net 25  
Net change in unrealized appreciation (depreciation) on investments (25)  
Fair value, end of period 20,347  
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held (25)  
First Lien Senior Secured [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value, beginning of period   52,566
Purchase of investments (including PIK, if any)   62,453
Amortization of premium/accretion of discount, net   49
Net change in unrealized appreciation (depreciation) on investments   (221)
Fair value, end of period   114,847
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held   $ (221)
Common Equity [Member]    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Fair value, beginning of period 400  
Net change in unrealized appreciation (depreciation) on investments (52)  
Fair value, end of period 348  
Net change in unrealized appreciation (depreciation) on non-controlled/ non-affiliated company investments still held $ (52)