Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

v3.25.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Mar. 31, 2024
Summary of Investment Holdings [Line Items]    
Cost $ 1,021,741 $ 854,290 [1]
Fair Value 1,072,230 920,504 [1]
B+T Group Acquisition, Inc., Edge Adhesives Holdings Inc., and J.R. Hobbs Co    
Summary of Investment Holdings [Line Items]    
Cost $ 90,000  
Cost percentage 11.50%  
Fair Value $ 49,600  
Fair value percentage 7.00%  
Edge and J.R. Hobbs    
Summary of Investment Holdings [Line Items]    
Cost   $ 59,100
Cost percentage   9.00%
Fair Value   $ 29,700
Fair value percentage   4.80%
[1] Cumulative gross unrealized appreciation for federal income tax purposes is $180.5 million; cumulative gross unrealized depreciation for federal income tax purposes is $115.8 million. Cumulative net unrealized appreciation is $64.7 million, based on a tax cost of $855.8 million.