v3.26.1
Fair Value Measurements - Schedule of Changes In Fair Value Investments (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of the period $ 655,446 $ 51,324 $ 452,442 $ 0
Purchases and originations of investments 71,777 82,365 281,493 133,689
Paid-in-kind interest income 1,945 0 4,114 0
Paid-in-kind dividend income 1,591 0 3,139 0
Proceeds from sale of investments and principal repayments (16,807) 0 (17,898) 0
Net change in unrealized gains (losses) on investments (7,037) (140) (16,762) (168)
Net realized gains (losses) on investments (1) 0 (1) 0
Net amortization of discount on investments 325 56 712 84
Transfers into (out of) Level 3 0 0 0 0
Fair value, end of period 707,239 133,605 707,239 133,605
Net change in unrealized gains (losses) on non-controlled, non-affiliated investments still held at June 30, 2026 (7,037) (140) (16,762) (168)
First Lien Debt Investments [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of the period 441,766 51,324 309,054 0
Purchases and originations of investments 71,777 42,965 207,993 94,289
Paid-in-kind interest income 154 0 310 0
Paid-in-kind dividend income 0 0 0 0
Proceeds from sale of investments and principal repayments (1,697) 0 (2,788) 0
Net change in unrealized gains (losses) on investments (2,998) (243) (5,808) (271)
Net realized gains (losses) on investments 0 0 0 0
Net amortization of discount on investments 226 39 467 67
Transfers into (out of) Level 3 0 0 0 0
Fair value, end of period 509,228 94,085 509,228 94,085
Net change in unrealized gains (losses) on non-controlled, non-affiliated investments still held at June 30, 2026 (2,998) (243) (5,808) (271)
Second Lien Debt Investments [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of the period 81,330 0 88,220 0
Purchases and originations of investments 0 39,400 0 39,400
Paid-in-kind interest income 0 0 0 0
Paid-in-kind dividend income 0 0 0 0
Proceeds from sale of investments and principal repayments 0 0 0 0
Net change in unrealized gains (losses) on investments (3,167) 103 (10,137) 103
Net realized gains (losses) on investments 0 0 0 0
Net amortization of discount on investments 57 17 137 17
Transfers into (out of) Level 3 0 0 0 0
Fair value, end of period 78,220 39,520 78,220 39,520
Net change in unrealized gains (losses) on non-controlled, non-affiliated investments still held at June 30, 2026 (3,167) 103 (10,137) 103
Unsecured and Subordinated debt investments [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of the period 75,549 0   0
Purchases and originations of investments 0 0 73,500 0
Paid-in-kind interest income 1,791 0 3,804 0
Proceeds from sale of investments and principal repayments (15,110)   (15,110)  
Net change in unrealized gains (losses) on investments (11) 0 (41) 0
Net realized gains (losses) on investments (1)   (1) 0
Net amortization of discount on investments 42 0 108 0
Transfers into (out of) Level 3     0 0
Fair value, end of period 62,260 0 62,260 0
Net change in unrealized gains (losses) on non-controlled, non-affiliated investments still held at June 30, 2026 (11) 0 (41) 0
Preferred Equity Investments [Member]        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]        
Fair value, beginning of the period 56,801 0 55,168 0
Purchases and originations of investments 0 0 0 0
Paid-in-kind interest income 0 0 0 0
Paid-in-kind dividend income 1,591 0 3,139 0
Proceeds from sale of investments and principal repayments 0 0 0 0
Net change in unrealized gains (losses) on investments 861 0 (776) 0
Net realized gains (losses) on investments 0 0 0 0
Net amortization of discount on investments 0 0 0 0
Transfers into (out of) Level 3 0 0 0 0
Fair value, end of period 57,531 0 57,531 0
Net change in unrealized gains (losses) on non-controlled, non-affiliated investments still held at June 30, 2026 $ 861 $ 0 $ (776) $ 0