v3.26.3
NET ASSETS - Schedule of Net Assets Activity (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Investment Company, Net Assets [Roll Forward]                    
Beginning balance (in shares)     83,633,744       83,633,744      
Net assets $ 7,725,830 $ 5,030,059 $ 3,129,997 $ 1,449,175 $ 815,063 $ 568,594 $ 7,725,830 $ 1,449,175 $ 2,094,585 $ 156,453
Issuances of common shares 2,692,463 1,882,190 1,047,302 639,948 241,982 412,827        
Shares issued in connection with distribution reinvestment plan 50,448 28,945 18,525 7,021 3,566 2,597        
Dividends declared and payable $ (172,396) (104,823) (69,002) (33,208) (18,396) (11,355)        
Repurchased shares, net of early repurchase deductions (in shares) (480,845)           (1,338,568)      
Repurchased shares, net of early repurchase deduction of $1 and $1, respectively $ (11,880) (4,912) (16,375) (11,662)     $ (33,200)      
Net investment income 103,998 55,458 28,723 (4,506) (2,335) (7,991) 188,179 (14,832)    
Net realized gains (losses) on investments and derivatives (1,083) (315) 195 361 245 919 $ (1,203) 1,525    
Net unrealized gains on investments and derivatives $ 34,221 43,519 26,044 36,158 21,407 15,144        
Ending balance (in shares) 312,168,562           312,168,562      
Net assets, end of period $ 7,725,830 $ 5,030,059 $ 3,129,997 $ 1,449,175 $ 815,063 $ 568,594 $ 7,725,830 1,449,175    
Distributions from net investment income (in usd per share)       $ 0.6330 $ 0.6330 $ 0.6750        
Class I                    
Investment Company, Net Assets [Roll Forward]                    
Beginning balance (in shares)     81,816,992       81,816,992      
Net assets $ 5,359,324     $ 1,449,175     $ 5,359,324 $ 1,449,175 2,049,085  
Issuances of common shares (in shares) 58,802,791     25,697,617     132,897,278 51,893,275    
Issuances of common shares $ 1,459,666     $ 639,948     $ 3,308,699 $ 1,294,757    
Shares issued in connection with dividend reinvestment plan (in shares) 1,406,790     282,410     3,144,469 529,239    
Shares issued in connection with distribution reinvestment plan $ 34,898     $ 7,021     $ 78,244 $ 13,184    
Dividends declared and payable $ (125,081)           $ (280,327)      
Repurchased shares, net of early repurchase deductions (in shares) (469,052)     (469,801)     (1,320,785) (469,801)    
Repurchased shares, net of early repurchase deduction of $1 and $1, respectively $ (11,602)     $ (11,662)     $ (32,750) $ (11,662)    
Ending balance (in shares) 216,547,938     58,179,313     216,547,938 58,179,313    
Net assets, end of period $ 5,359,324     $ 1,449,175     $ 5,359,324 $ 1,449,175    
Distributions from net investment income (in usd per share) $ 0.6249 $ 0.6249 $ 0.6249       $ 1.8747 $ 1.9367    
Class S                    
Investment Company, Net Assets [Roll Forward]                    
Beginning balance (in shares)     1,790,507       1,790,507      
Net assets $ 416,921           $ 416,921   44,843  
Issuances of common shares (in shares) 4,709,014     0     14,817,469 0    
Issuances of common shares $ 116,828     $ 0     $ 369,012 $ 0    
Shares issued in connection with dividend reinvestment plan (in shares) 132,102           244,061      
Shares issued in connection with distribution reinvestment plan $ 3,278     0     $ 6,069 0    
Dividends declared and payable (8,607)           $ (17,252)      
Repurchased shares, net of early repurchase deductions (in shares)             (5,990)      
Repurchased shares, net of early repurchase deduction of $1 and $1, respectively $ 2     $ 0     $ (142) $ 0    
Ending balance (in shares) 16,846,047     0     16,846,047 0    
Net assets, end of period $ 416,921           $ 416,921      
Distributions from net investment income (in usd per share) $ 0.5718 0.5721 $ 0.5725       $ 1.7164      
Class D                    
Investment Company, Net Assets [Roll Forward]                    
Beginning balance (in shares)     26,245       26,245      
Net assets $ 186,718           $ 186,718   657  
Issuances of common shares (in shares) 5,467,541     0     7,479,580 0    
Issuances of common shares $ 135,760     $ 0     $ 185,860 $ 0    
Shares issued in connection with dividend reinvestment plan (in shares) 44,494           48,644      
Shares issued in connection with distribution reinvestment plan $ 1,104     0     $ 1,207 0    
Dividends declared and payable (3,967)           (4,647) 0    
Repurchased shares, net of early repurchase deduction of $1 and $1, respectively $ 1     $ 0     $ 1 $ 0    
Ending balance (in shares) 7,544,485     0     7,544,485 0    
Net assets, end of period $ 186,718           $ 186,718      
Distributions from net investment income (in usd per share) $ 0.6093 0.6094 $ 0.6095       $ 1.8281      
Class N                    
Investment Company, Net Assets [Roll Forward]                    
Net assets $ 1,762,867           $ 1,762,867      
Issuances of common shares (in shares) 39,496,811     0     70,742,222 0    
Issuances of common shares $ 980,209     $ 0     $ 1,758,384 $ 0    
Shares issued in connection with dividend reinvestment plan (in shares) 450,310     0     499,663 0    
Shares issued in connection with distribution reinvestment plan $ 11,168     $ 0     $ 12,398 $ 0    
Dividends declared and payable $ (34,741)           $ (43,995) 0    
Repurchased shares, net of early repurchase deductions (in shares) (11,793)           (11,793)      
Repurchased shares, net of early repurchase deduction of $1 and $1, respectively $ (281)     $ 0     $ (276) $ 0    
Ending balance (in shares) 71,230,092     0     71,230,092 0    
Net assets, end of period $ 1,762,867           $ 1,762,867      
Distributions from net investment income (in usd per share) $ 0.5936 $ 0.3958         $ 0.9894      
Common Shares                    
Investment Company, Net Assets [Roll Forward]                    
Beginning balance (in shares) 202,139,554 125,613,848 83,633,744 32,669,087 22,809,905 6,226,600 83,633,744 6,226,600    
Net assets $ 3,122 $ 2,022 $ 1,257 $ 582 $ 327 $ 228 $ 3,122 $ 582 836 62
Issuances of common shares (in shares) 108,476,157 75,563,115 41,897,277 25,697,617 9,716,022 16,479,636        
Issuances of common shares $ 1,085 $ 756 $ 419 $ 257 $ 97 $ 165        
Shares issued in connection with dividend reinvestment plan (in shares) 2,033,696 1,161,958 741,183 282,410 143,160 103,669        
Shares issued in connection with distribution reinvestment plan $ 20 $ 11 $ 7 $ 2 $ 2 $ 1        
Repurchased shares, net of early repurchase deductions (in shares) (480,845) (199,367) (658,356) (469,801)            
Repurchased shares, net of early repurchase deduction of $1 and $1, respectively $ (5) $ (2) $ (5) $ (4)            
Ending balance (in shares) 312,168,562 202,139,554 125,613,848 58,179,313 32,669,087 22,809,905 312,168,562 58,179,313    
Net assets, end of period $ 3,122 $ 2,022 $ 1,257 $ 582 $ 327 $ 228 $ 3,122 $ 582    
Capital in Excess of Par Value                    
Investment Company, Net Assets [Roll Forward]                    
Net assets 7,307,649 4,750,114 2,949,479 1,382,661 780,817 553,764 7,307,649 1,382,661 1,969,450 149,861
Issuances of common shares 2,691,378 1,881,434 1,046,883 639,691 241,885 412,662        
Shares issued in connection with distribution reinvestment plan 50,428 28,934 18,518 7,019 3,564 2,596        
Dividends declared and payable (172,396) (104,823) (69,002) (33,208) (18,396) (11,355)        
Repurchased shares, net of early repurchase deduction of $1 and $1, respectively (11,875) (4,910) (16,370) (11,658)            
Net assets, end of period 7,307,649 4,750,114 2,949,479 1,382,661 780,817 553,764 7,307,649 1,382,661    
Accumulated Undistributed Earnings                    
Investment Company, Net Assets [Roll Forward]                    
Net assets 415,059 277,923 179,261 65,932 33,919 14,602 415,059 65,932 $ 124,299 $ 6,530
Net investment income 103,998     (4,506)            
Net realized gains (losses) on investments and derivatives (1,083) (315) 195 361 245 919        
Net unrealized gains on investments and derivatives 34,221 43,519 26,044 36,158 21,407 15,144        
Net assets, end of period $ 415,059 $ 277,923 $ 179,261 $ 65,932 $ 33,919 $ 14,602 $ 415,059 $ 65,932