Quarterly report pursuant to Section 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 12 Months Ended
Sep. 30, 2023
Jun. 30, 2023
 [1]
Sep. 30, 2022
Jun. 30, 2022
 [1]
Sep. 30, 2023
Sep. 30, 2022
Mar. 31, 2023
Equity [Abstract]              
Investment company, cash distributions paid to common stockholders from ordinary income 72.70%       72.70%    
Investment company, cash distributions paid to common stockholders from capital gains 27.30%       27.30%    
Cash distributions to common stockholders         $ 24,300 $ 18,900  
Distributions to common stockholders from ordinary income $ 6,665 [1] $ 7,069 $ 4,678 [1] $ 3,188     $ 21,400
Distributions to common stockholders from net realized gains 5,519 [1] $ 5,024 2,797 [1] $ 8,268     $ 10,600
Investment company, net adjustments for tax difference to capital distribution $ 500   $ 400   $ 100 $ 1,300  
[1] Refer to Note 8 — Distributions to Common Stockholders in the accompanying Notes to Consolidated Financial Statements for additional information.