v3.26.1
INVESTMENTS - Superscript (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
STRS JV's portfolio company investments as a percentage of members' equity 225.10% 222.70%
PIK interest rate 12.39%  
Investments, fair value $ 569,202 $ 578,649
STRS JV    
Schedule of Investments [Line Items]    
STRS JV's portfolio company investments as a percentage of members' equity 1000.00% 984.30%
STRS JV's portfolio company investments as a percentage of total assets 97.10% 96.30%
Outstanding commitments to fund investments $ 40,230 $ 41,415
Investments, fair value $ 340,272 $ 323,552