Quarterly report [Sections 13 or 15(d)]

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)

v3.25.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details)
$ in Thousands
 3 Months Ended
Jun. 30, 2025
USD ($)
segment
Mar. 31, 2025
USD ($)
Summary of Investment Holdings [Line Items]    
Money market funds $ 1,500 $ 1,800
Cost 997,538 939,066 [1]
Fair Value $ 1,036,745 979,320 [1]
Number of reportable segments | segment 1  
B+T Group Acquisition, Inc., Edge Adhesives Holdings Inc., and J.R. Hobbs Co    
Summary of Investment Holdings [Line Items]    
Cost $ 90,300  
Cost percentage 12.60%  
Fair Value $ 51,700  
Fair value percentage 7.90%  
Edge and J.R. Hobbs    
Summary of Investment Holdings [Line Items]    
Cost   $ 90,200
Cost percentage   13.10%
Fair Value   $ 50,900
Fair value percentage   8.20%
[1] Cumulative gross unrealized appreciation for federal income tax purposes is $183.3 million; cumulative gross unrealized depreciation for federal income tax purposes is $144.9 million. Cumulative net unrealized appreciation is $38.5 million, based on a tax cost of $940.9 million.