Quarterly report [Sections 13 or 15(d)]

DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details)

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DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details)
$ in Millions
6 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
distribution
Mar. 31, 2025
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
Dec. 31, 2024
Equity [Abstract]          
Investment company, number of monthly distributions | distribution 3        
Investment company, cash distributions paid to common stockholders from ordinary income       93.70% 83.10%
Investment company, cash distributions paid to common stockholders from capital gains       6.30% 16.90%
Cash distributions to common stockholders $ 20.3 $ 31.0      
Tax return of capital distribution     $ 5.5