v3.26.1
FAIR VALUE MEASUREMENTS - Schedule of Changes in Fair Value of Investments Measured Using Level 3 Inputs (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Total Investments    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance $ 1,785,299 $ 1,476,561
Realized & Unrealized Gains (Losses) (15,104) (39,379)
Purchases of Investments 700,113 633,526
Repayments (312,959) (248,769)
PIK Interest Capitalized 14,066 12,930
Divestitures (73,969) (49,570)
Conversion/Exchange of Security 0 0
Fair value. ending balance 2,097,446 1,785,299
YTD Unrealized Appreciation (Depreciation) on Investments held at period end (11,318) (3,883)
First lien loans    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 1,586,622 1,309,449
Realized & Unrealized Gains (Losses) (37,674) (61,142)
Purchases of Investments 680,918 616,629
Repayments (310,505) (244,854)
PIK Interest Capitalized 13,979 12,843
Divestitures (30,987) (31,584)
Conversion/Exchange of Security (11,947) (14,719)
Fair value. ending balance 1,890,406 1,586,622
YTD Unrealized Appreciation (Depreciation) on Investments held at period end (32,632) (21,908)
Second lien loans    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 18,066 33,774
Realized & Unrealized Gains (Losses) 1,144 (6,960)
Purchases of Investments (46) 37
Repayments (2,308) (3,840)
PIK Interest Capitalized 79 70
Divestitures 0 0
Conversion/Exchange of Security 7,996 (5,015)
Fair value. ending balance 24,931 18,066
YTD Unrealized Appreciation (Depreciation) on Investments held at period end 1,290 (5,062)
Subordinated debt    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 1,218 1,336
Realized & Unrealized Gains (Losses) 20 36
Purchases of Investments 57 57
Repayments (146) (75)
PIK Interest Capitalized 8 17
Divestitures 0 0
Conversion/Exchange of Security 0 (153)
Fair value. ending balance 1,157 1,218
YTD Unrealized Appreciation (Depreciation) on Investments held at period end 20 28
Preferred equity    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 102,918 71,127
Realized & Unrealized Gains (Losses) (5,307) 25,094
Purchases of Investments 9,038 9,767
Repayments 0 0
PIK Interest Capitalized 0 0
Divestitures (31,323) (16,920)
Conversion/Exchange of Security (688) 13,850
Fair value. ending balance 74,638 102,918
YTD Unrealized Appreciation (Depreciation) on Investments held at period end (1,390) 18,671
Common equity & warrants    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 76,475 60,875
Realized & Unrealized Gains (Losses) 26,132 3,593
Purchases of Investments 6,689 7,036
Repayments 0 0
PIK Interest Capitalized 0 0
Divestitures (11,659) (1,066)
Conversion/Exchange of Security 4,639 6,037
Fair value. ending balance 102,276 76,475
YTD Unrealized Appreciation (Depreciation) on Investments held at period end 20,813 4,388
Earnout    
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Fair value, beginning balance 0  
Realized & Unrealized Gains (Losses) 581  
Purchases of Investments 3,457  
Repayments 0  
PIK Interest Capitalized 0  
Divestitures 0  
Conversion/Exchange of Security 0  
Fair value. ending balance 4,038 $ 0
YTD Unrealized Appreciation (Depreciation) on Investments held at period end $ 581