v3.26.1
Consolidated Statements of Changes in Net Assets - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Sep. 30, 2024
Operations:                    
Net investment income $ 32,521 $ 34,362 $ 36,703 $ 33,481 $ 39,055 $ 44,302 $ 103,586 $ 116,838    
Net unrealized appreciation (depreciation) 48,210     18,572     (23,546) (83,065)    
Net realized gains (losses) (49,539)     (13,432)     (61,807) (24,037)    
(Provision) benefit for taxes on realized and unrealized gains (losses) (252) (303) (19) (269) 14 (139) (574) (394)    
Net increase (decrease) in net assets resulting from operations 30,940     38,352     17,659 9,342    
Stockholder transactions:                    
Distributions to stockholders (29,949)     (36,996)     (100,417) (123,631)    
Net increase (decrease) in net assets from stockholder transactions (29,949) (35,234) (35,234) (36,996) (41,400) (45,235) (100,417) (123,631)    
Capital share transactions:                    
Issuance of common stock under dividend reinvestment plan 1,082 1,140 1,137 3,751 4,289 1,455 3,359 9,495    
Repurchase of common stock under dividend reinvestment plan (1,082)     (3,751)     (3,359) (9,495)    
Issuance of common stock in private placement 0     0 100,000   0 100,000    
Issuance of common stock in connection with the "at the market" offering 0     0 2,947   0 2,947    
Net increase (decrease) in net assets from capital share transactions 0     0     0 102,947    
Total increase (decrease) in net assets 991     1,356     (82,758) (11,342)    
Net assets at beginning of period 1,382,064 1,436,187 1,465,813 1,475,113 1,449,815 1,487,811 1,465,813 1,487,811    
Net assets at end of period $ 1,383,055 $ 1,382,064 $ 1,436,187 $ 1,476,469 $ 1,475,113 $ 1,449,815 $ 1,383,055 $ 1,476,469    
Net asset value per common share (in dollars per share) $ 15.70 $ 15.69   $ 16.76 $ 16.75   $ 15.70 $ 16.76 $ 16.64 $ 18.09
Common shares outstanding at end of period (in shares) 88,086 88,086   88,086 88,086   88,086 88,086 88,086 82,245