v3.26.3
FAIR VALUE MEASUREMENTS - Schedule of Changes in Fair Value of Investments Measured Using Level 3 Inputs (Details) - USD ($)
$ in Thousands
6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Total Investments    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance $ 2,097,446 $ 1,785,299
Realized & Unrealized Gains (Losses) (22,934) (6,686)
Purchases of Investments 564,624 245,933
Repayments (141,991) (116,483)
PIK Interest Capitalized 10,733 6,115
Divestitures (97,749) (36,271)
Conversion/Exchange of Security 0 0
Fair value. ending balance 2,410,129 1,877,907
YTD Unrealized Appreciation (Depreciation) on Investments held at period end (24,804) 379
First lien loans    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 1,890,406 1,586,622
Realized & Unrealized Gains (Losses) (21,528) (19,113)
Purchases of Investments 507,688 236,403
Repayments (141,756) (116,337)
PIK Interest Capitalized 10,577 6,107
Divestitures (90,191) (1,789)
Conversion/Exchange of Security 0 (3,951)
Fair value. ending balance 2,155,196 1,687,942
YTD Unrealized Appreciation (Depreciation) on Investments held at period end (21,068) (16,012)
Second lien loans    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 24,931 18,066
Realized & Unrealized Gains (Losses) 201 (922)
Purchases of Investments 45 26
Repayments (235) 0
PIK Interest Capitalized 156 0
Divestitures 0 0
Conversion/Exchange of Security 0 0
Fair value. ending balance 25,098 17,170
YTD Unrealized Appreciation (Depreciation) on Investments held at period end 202 (922)
Subordinated debt    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 1,157 1,218
Realized & Unrealized Gains (Losses) 8 2
Purchases of Investments 49 57
Repayments 0 (146)
PIK Interest Capitalized 0 8
Divestitures 0 0
Conversion/Exchange of Security 0 0
Fair value. ending balance 1,214 1,139
YTD Unrealized Appreciation (Depreciation) on Investments held at period end 8 2
Preferred equity    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 74,638 102,918
Realized & Unrealized Gains (Losses) 1,833 (7,860)
Purchases of Investments 7,017 3,427
Repayments 0 0
PIK Interest Capitalized 0 0
Divestitures 0 (31,323)
Conversion/Exchange of Security 0 (688)
Fair value. ending balance 83,488 66,474
YTD Unrealized Appreciation (Depreciation) on Investments held at period end 1,833 (3,475)
Common equity & warrants    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 102,276 76,475
Realized & Unrealized Gains (Losses) (3,564) 20,922
Purchases of Investments 13,325 2,563
Repayments 0 0
PIK Interest Capitalized 0 0
Divestitures (5,161) (3,159)
Conversion/Exchange of Security 0 4,639
Fair value. ending balance 106,876 101,440
YTD Unrealized Appreciation (Depreciation) on Investments held at period end (5,895) 20,501
Earnout    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 4,038 0
Realized & Unrealized Gains (Losses) 250 285
Purchases of Investments 0 3,457
Repayments 0 0
PIK Interest Capitalized 0 0
Divestitures (2,397) 0
Conversion/Exchange of Security 0 0
Fair value. ending balance 1,891 3,742
YTD Unrealized Appreciation (Depreciation) on Investments held at period end 250 $ 285
JV equity    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 0  
Realized & Unrealized Gains (Losses) (134)  
Purchases of Investments 36,500  
Repayments 0  
PIK Interest Capitalized 0  
Divestitures 0  
Conversion/Exchange of Security 0  
Fair value. ending balance 36,366  
YTD Unrealized Appreciation (Depreciation) on Investments held at period end $ (134)