v3.26.1
NET ASSETS - Summary of Changes in Net Assets (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jan. 17, 2025
Mar. 31, 2026
Mar. 31, 2025
Investment Company, Net Assets [Roll Forward]      
Net assets at beginning of period   $ 1,167,388 $ 905,204
Common stock at beginning of period (in shares)   71,807,190  
Common stock issued, net of offering and underwriting costs   $ 0 101
Common stock issued - CSL III Merger   $ 0 315,838
Common stock issued - Preferred Stock Exchange     $ 0
Repurchase of common stock (in shares)   (1,536,254)  
Repurchase of common stock   $ (18,501)  
Dividend reinvestment (in shares) 50,728 0 50,728
Dividend reinvestment $ 949 $ 0 $ 949
Net investment income (loss)   25,204 21,629
Net realized gain (loss)   (9,618) (19,341)
Net change in unrealized appreciation (depreciation)   (19,804) 11,766
Dividends declared on common stock   (28,108) (23,757)
Net assets at end of period   $ 1,116,561 $ 1,212,389
Common stock at end of period (in shares)   70,270,936 72,902,981
Preferred Stock      
Investment Company, Net Assets [Roll Forward]      
Preferred stock at beginning of period (in shares)     2,000,000
Net assets at beginning of period     $ 50,000
Common stock issued - Preferred Stock Exchange (in shares)     (2,000,000)
Common stock issued - Preferred Stock Exchange     $ (50,000)
Preferred stock at end of period (in shares)     0
Net assets at end of period     $ 0
  Common Stock      
Investment Company, Net Assets [Roll Forward]      
Net assets at beginning of period   $ 718 $ 509
Common stock at beginning of period (in shares)   71,807,190 50,906,262
Common stock issued, net of offering and underwriting costs (in shares)     6,075
Common stock issued - CSL III Merger (in shares)     18,935,108
Common stock issued - CSL III Merger     $ 189
Common stock issued - Preferred Stock Exchange (in shares)     3,004,808
Common stock issued - Preferred Stock Exchange     $ 30
Repurchase of common stock (in shares)   (1,536,254)  
Repurchase of common stock   $ (15)  
Dividend reinvestment (in shares)     50,728
Dividend reinvestment     $ 1
Net assets at end of period   $ 703 $ 729
Common stock at end of period (in shares)   70,270,936 72,902,981
Capital in Excess of Par Value      
Investment Company, Net Assets [Roll Forward]      
Net assets at beginning of period   $ 1,363,998 $ 1,014,308
Common stock issued, net of offering and underwriting costs     101
Common stock issued - CSL III Merger     315,649
Common stock issued - Preferred Stock Exchange     49,970
Repurchase of common stock   (18,486)  
Dividend reinvestment     948
Net assets at end of period   1,345,512 1,380,976
Offering Costs      
Investment Company, Net Assets [Roll Forward]      
Net assets at beginning of period   (1,633) (1,633)
Net assets at end of period   (1,633) (1,633)
Accumulated Net Investment Income (Loss)      
Investment Company, Net Assets [Roll Forward]      
Net assets at beginning of period   49,923 68,440
Net investment income (loss)   25,204 21,629
Dividends declared on common stock   (28,108) (23,757)
Net assets at end of period   47,019 66,312
Accumulated Net Realized Gain (Loss)      
Investment Company, Net Assets [Roll Forward]      
Net assets at beginning of period   (232,362) (185,346)
Net realized gain (loss)   (9,618) (19,341)
Net assets at end of period   (241,980) (204,687)
Accumulated Net Unrealized Appreciation (Depreciation)      
Investment Company, Net Assets [Roll Forward]      
Net assets at beginning of period   (13,256) (41,074)
Net change in unrealized appreciation (depreciation)   (19,804) 11,766
Net assets at end of period   $ (33,060) $ (29,308)