v3.26.1
Fair Value Measurement - Summary of Changes in Fair Value of Level 3 Assets By Investment (Detail) - USD ($)
 9 Months Ended 12 Months Ended
Dec. 31, 2023
Dec. 31, 2025
Dec. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Waiver for management and incentive fees (Note 3) $ 1,249,000 $ 0 $ 0
Fair Value, Inputs, Level 3 [Member]      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning Balance   1,541,927,000 565,360,000
Net Purchases   1,800,223,000 1,174,886
Net Sales, Exits and Repayments   (385,184,000) (204,525,000)
PIK   3,066,000 1,063,000
Accrued Discounts/ Amortized Premiums   5,360,000 4,227,000
Net Change in Unrealized Appreciation/ (Depreciation)   (6,701,000) 916,000
Ending Balance 565,360,000 2,958,691,000 1,541,927,000
Change in Unrealized Appreciation/ Depreciation   (8,339,000) 1,638,000
Fair Value, Inputs, Level 3 [Member] | Adjustment of First Lien Senior Secured [Member]      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning Balance   1,532,466,000 531,616,000
Net Purchases   1,738,566,000 1,148,365,000
Net Sales, Exits and Repayments   (370,311,000) (153,681,000)
PIK   3,066,000 1,063,000
Accrued Discounts/ Amortized Premiums   5,350,000 4,207,000
Net Change in Unrealized Appreciation/ (Depreciation)   (5,723,000) 896,000
Ending Balance 531,616,000 2,903,414,000 1,532,466,000
Change in Unrealized Appreciation/ Depreciation   (7,366,000) 1,643,000
Fair Value, Inputs, Level 3 [Member] | Second Lien Senior Secured [Member]      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning Balance   4,467,000 4,494,000
Net Purchases   1,037,000 (21,000)
Net Sales, Exits and Repayments   (23,000) (46,000)
Accrued Discounts/ Amortized Premiums   5,000 20,000
Net Change in Unrealized Appreciation/ (Depreciation)   (26,000) 20,000
Ending Balance 4,494,000 5,460,000 4,467,000
Change in Unrealized Appreciation/ Depreciation   (21,000) (4,000)
Fair Value, Inputs, Level 3 [Member] | Subordinated Notes [Member]      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning Balance   4,994,000 0
Net Purchases   58,631,000 4,994,000
Net Sales, Exits and Repayments   (14,850,000)  
Accrued Discounts/ Amortized Premiums   5,000  
Net Change in Unrealized Appreciation/ (Depreciation)   538,000  
Ending Balance 0 49,318,000 4,994,000
Change in Unrealized Appreciation/ Depreciation   538,000 0
Fair Value, Inputs, Level 3 [Member] | Preferred Equity [Member]      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Net Purchases   1,989,000  
Net Change in Unrealized Appreciation/ (Depreciation)   (1,490,000)  
Ending Balance   499,000  
Change in Unrealized Appreciation/ Depreciation   (1,490,000)  
Fair Value, Inputs, Level 3 [Member] | CLO Warehouse [Member]      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]      
Beginning Balance   $ 0 29,250,000
Net Purchases     21,548,000
Net Sales, Exits and Repayments     (50,798,000)
Ending Balance $ 29,250,000   0
Change in Unrealized Appreciation/ Depreciation     $ 0