Quarterly report pursuant to Section 13 or 15(d)

MANDATORILY REDEEMABLE PREFERRED STOCK - Narrative (Details)

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MANDATORILY REDEEMABLE PREFERRED STOCK - Narrative (Details) - USD ($)
$ / shares in Units, $ in Thousands
 1 Months Ended 3 Months Ended 12 Months Ended
Aug. 31, 2021
Sep. 30, 2022
Jun. 30, 2022
 [1]
Sep. 30, 2021
 [1]
Jun. 30, 2021
 [1]
Mar. 31, 2022
Dec. 31, 2021
Dividends Payable [Line Items]              
Loss on extinguishment of debt $ 2,000            
Distributions to common stockholders from ordinary income   $ 4,678 [1] $ 3,188 $ 5,490 $ 6,593 $ 13,900  
Distributions to common stockholders from net realized gains   $ 2,797 [1] $ 8,268 $ 2,482 $ 2,372 $ 15,700  
Investment company, cash distributions paid to common stockholders from ordinary income   61.10%         71.30%
Investment company, cash distributions paid to common stockholders from capital gains   38.90%         28.70%
Series E Term Preferred Stock              
Dividends Payable [Line Items]              
Preferred stock, dividend rate, percentage 6.375%            
Preferred stock, liquidation preference (in USD per share) $ 25.00            
[1] o Note 9 — Distributions to Common Stockholders in the accompanying Notes to Consolidated Financial Statements for additional information.