Quarterly report [Sections 13 or 15(d)]

DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details)

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DISTRIBUTIONS TO COMMON STOCKHOLDERS - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Mar. 31, 2026
Dec. 31, 2025
Equity [Abstract]            
Investment company, cash distributions paid to common stockholders from ordinary income (percent)           51.30%
Investment company, cash distributions paid to common stockholders from capital gains (percent)           48.70%
Cash distributions to common stockholders     $ 19,100 $ 38,100    
Investment company, distributions paid subsequent to fiscal year-end, classified in prior year, ordinary income         $ 21,300  
Capital loss carryforwards         17,300  
Investment company, distribution paid subsequent to fiscal year-end, classified in prior year, capital gains         $ 0  
Investment company, net adjustments for tax difference to capital distribution $ 300 $ 2 $ 6 $ 300    
Investment company, deemed distribution approach, notice period     60 days