Annual report [Section 13 and 15(d), not S-K Item 405]

ORGANIZATION AND BASIS OF PRESENTATION (Details)

v3.25.4
ORGANIZATION AND BASIS OF PRESENTATION (Details) - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Investment Company, Financial Highlights [Line Items]      
Net investment income before taxes $ 366,741 $ 355,059 $ 339,019
Excise tax expense (4,051) (5,851) (3,190)
Federal and state income and other tax expenses (9,972) (7,807) (5,087)
NET INVESTMENT INCOME $ 352,718 $ 341,401 $ 330,742
Net investment income per share, basic (in dollars per share) $ 3.95 $ 3.93 $ 4.04
Net investment income per share, diluted (in dollars per share) $ 3.95 $ 3.93 $ 4.04
Income tax provision on net realized gain (loss) and net unrealized appreciation $ (12,778) $ (16,975) $ (14,365)
Total income tax provision   0 0
As Previously Reported      
Investment Company, Financial Highlights [Line Items]      
Net investment income before taxes   355,059 339,019
Excise tax expense   0 0
Federal and state income and other tax expenses   0 0
NET INVESTMENT INCOME   $ 355,059 $ 339,019
Net investment income per share, basic (in dollars per share)   $ 4.09 $ 4.14
Net investment income per share, diluted (in dollars per share)   $ 4.09 $ 4.14
Income tax provision on net realized gain (loss) and net unrealized appreciation   $ 0 $ 0
Total income tax provision   (30,633) (22,642)
Adjustments      
Investment Company, Financial Highlights [Line Items]      
Net investment income before taxes   0 0
Excise tax expense   (5,851) (3,190)
Federal and state income and other tax expenses   (7,807) (5,087)
NET INVESTMENT INCOME   $ (13,658) $ (8,277)
Net investment income per share, basic (in dollars per share)   $ (0.16) $ (0.10)
Net investment income per share, diluted (in dollars per share)   $ (0.16) $ (0.10)
Income tax provision on net realized gain (loss) and net unrealized appreciation   $ (16,975) $ (14,365)
Total income tax provision   $ 30,633 $ 22,642