v3.26.3
RELATED PARTY TRANSACTIONS (Details) - JV Equity - USD ($)
$ in Millions
1 Months Ended 6 Months Ended
Sep. 21, 2026
Jan. 22, 2026
Sep. 30, 2026
May 31, 2026
Sep. 30, 2026
CapTrin          
Related Party Transaction [Line Items]          
Initial equity capital commitment   $ 50.0      
Capital commitments funded         $ 28.5
Portfolio investments sold     $ 13.0 $ 47.1  
Dividends receivable     $ 0.5   0.5
Desert Star          
Related Party Transaction [Line Items]          
Initial equity capital commitment $ 25.0        
Capital commitments funded         8.0
Trinity | CapTrin          
Related Party Transaction [Line Items]          
Initial equity capital commitment   50.0      
Trinity | Desert Star          
Related Party Transaction [Line Items]          
Initial equity capital commitment 175.0        
Capital Southwest Corporation And Trinity Capital Inc. | CapTrin          
Related Party Transaction [Line Items]          
Initial equity capital commitment   $ 100.0      
Capital commitments funded         57.0
Capital Southwest Corporation And Trinity Capital Inc. | Desert Star          
Related Party Transaction [Line Items]          
Initial equity capital commitment $ 200.0        
Capital commitments funded         $ 64.0