v3.26.3
CONSOLIDATED STATEMENTS OF CHANGES IN NET ASSETS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Sep. 30, 2025
Jun. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Investment Company, Net Assets [Roll Forward]            
Beginning balance (in shares)   60,577,181     60,577,181  
Beginning balance $ 1,058,456 $ 1,010,992 $ 916,474 $ 883,633 $ 1,010,992 $ 883,633
Issuance of common stock 66,010 62,634 39,693 41,172    
Share-based compensation 1,937 1,448 1,270 1,143    
Issuance of common stock under restricted stock plan, net of forfeitures 0 0 0 0    
Common stock withheld for payroll taxes upon vesting of restricted stock (2) (1,697)   (1,120)    
Dividends to shareholders (41,395) (39,641) (36,040) (35,344)    
Change in restoration plan liability (12) (12) (12) (11)    
Net investment income 36,292 35,680 31,984 31,889 71,971 63,873
Net realized loss on investments, net of tax, and disposal of fixed assets     (4,928)      
Net realized gain (loss) on investments, net of tax 3,149 (558) (4,926) 15,704 2,591 10,778
Net unrealized depreciation on investments, net of tax (16,595) (10,390) (1,437) (20,592) (26,985) (22,029)
Realized loss on extinguishment of debt $ (1,410)   $ 0   $ (1,410) $ 0
Ending balance (in shares) 66,491,300   56,967,000,000   66,491,300 56,967,000,000
Ending balance $ 1,106,430 $ 1,058,456 $ 947,004 $ 916,474 $ 1,106,430 $ 947,004
Common Stock            
Investment Company, Net Assets [Roll Forward]            
Beginning balance (in shares) 63,733,867 60,577,181 55,227,370 52,912,796 60,577,181 52,912,796
Beginning balance $ 15,933 $ 15,144 $ 13,807 $ 13,228 $ 15,144 $ 13,228
Issuance of common stock (in shares) 2,732,562 2,708,438 1,766,975 2,034,917    
Issuance of common stock $ 683 $ 677 $ 442 $ 509    
Issuance of common stock under restricted stock plan, net of forfeitures (in shares) 24,945 520,750 (27,347) 332,250    
Issuance of common stock under restricted stock plan, net of forfeitures $ 7 $ 130 $ (7) $ 83    
Common stock withheld for payroll taxes upon vesting of restricted stock (in shares) (74) (72,502)   (52,593)    
Common stock withheld for payroll taxes upon vesting of restricted stock   $ (18)   $ (13)    
Ending balance (in shares) 66,491,300 63,733,867 56,966,998 55,227,370 66,491,300 56,966,998
Ending balance $ 16,623 $ 15,933 $ 14,242 $ 13,807 $ 16,623 $ 14,242
Treasury Stock            
Investment Company, Net Assets [Roll Forward]            
Beginning balance $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Beginning balance (in shares) 0 0 0 0 0 0
Ending balance $ 0 $ 0 $ 0 $ 0 $ 0 $ 0
Ending balance (in shares) 0 0 0 0 0 0
Additional Paid-In Capital            
Investment Company, Net Assets [Roll Forward]            
Beginning balance $ 1,136,438 $ 1,074,854 $ 999,728 $ 959,123 $ 1,074,854 $ 959,123
Issuance of common stock 65,327 61,957 39,251 40,663    
Share-based compensation 1,937 1,448 1,270 1,143    
Issuance of common stock under restricted stock plan, net of forfeitures (7) (130) 7 (83)    
Common stock withheld for payroll taxes upon vesting of restricted stock (2) (1,679)   (1,107)    
Change in restoration plan liability (12) (12) (12) (11)    
Ending balance 1,203,681 1,136,438 1,040,244 999,728 1,203,681 1,040,244
Total Distributable Earnings (Loss)            
Investment Company, Net Assets [Roll Forward]            
Beginning balance (93,915) (79,006) (97,061) (88,718) (79,006) (88,718)
Dividends to shareholders (41,395) (39,641) (36,040) (35,344)    
Net investment income 36,292 35,680 31,984 31,889    
Net realized loss on investments, net of tax, and disposal of fixed assets     (4,928)      
Net realized gain (loss) on investments, net of tax 3,149 (558)   15,704    
Net unrealized depreciation on investments, net of tax (16,595) (10,390) (1,437) (20,592)    
Realized loss on extinguishment of debt (1,410)          
Ending balance $ (113,874) $ (93,915) $ (107,482) $ (97,061) $ (113,874) $ (107,482)