v3.25.2
Financial Highlights (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Investment Company, Financial Highlights [Roll Forward]        
Net asset value at beginning of period (in dollars per share)     $ 23.56  
Net asset value at end of period (in dollars per share) $ 23.14 $ 23.53 $ 23.14 $ 23.53
Common shares outstanding at beginning of period (in shares)     134,288,000  
Common shares outstanding at end of period (in shares) 182,204,000 122,364,000 182,204,000 122,364,000
Outstanding senior securities $ 2,409,400 $ 1,610,000 $ 2,409,400 $ 1,610,000
Class I shares        
Investment Company, Financial Highlights [Roll Forward]        
Net asset value at beginning of period (in dollars per share) $ 23.28 $ 23.61 $ 23.56 $ 23.56
Net investment income (in dollars per share) 0.46 0.54 1.50 1.58
Net unrealized appreciation (depreciation) (in dollars per share) 0.09 (0.02) (0.08) 0.15
Net realized gains (losses) (in dollars per share) (0.09) 0 (0.04) 0.04
Net increase (decrease) in net assets resulting from operations (in dollars per share) 0.46 0.52 1.38 1.77
Distributions of net investment income to shareholders (in dollars per share) (0.46) (0.54) (1.4962) (1.5811)
Distributions in excess of net investment income (in dollars per share) (0.14) (0.06) (0.30) (0.22)
Net asset value at end of period (in dollars per share) $ 23.14 $ 23.53 $ 23.14 $ 23.53
Total return 2.00% 2.22% 6.05% 7.77%
Common shares outstanding at beginning of period (in shares) 110,042,000 69,973,000 89,884,000 44,103,000
Common shares outstanding at end of period (in shares) 127,124,000 81,487,000 127,124,000 81,487,000
Net assets at the beginning of the period $ 2,561,941 $ 1,652,401 $ 2,118,000 $ 1,039,238
Net assets at end of period 2,942,033 1,917,516 2,942,033 1,917,516
Average net assets $ 3,010,527 $ 1,844,178 $ 2,578,139 $ 1,549,514
Ratio of net investment income to average net assets 2.02% 2.29% 6.41% 6.70%
Ratio of total expenses to average net assets 1.66% 1.84% 5.41% 5.41%
Ratio of net expenses to average net assets 1.66% 1.84% 5.41% 5.46%
Ratio of portfolio turnover to average investments at fair value 6.89% 10.13% 22.31% 25.67%
Weighted average outstanding debt $ 2,042,351 $ 1,366,868 $ 2,027,190 $ 1,035,128
Average debt per share (in dollars per share) $ 11.09 $ 11.68 $ 12.61 $ 10.58
Asset coverage ratio 275.22% 278.60% 275.22% 278.60%
Class S shares        
Investment Company, Financial Highlights [Roll Forward]        
Net asset value at beginning of period (in dollars per share) $ 23.28 $ 23.61 $ 23.56 $ 23.56
Net investment income (in dollars per share) 0.41 0.49 1.35 1.43
Net unrealized appreciation (depreciation) (in dollars per share) 0.09 (0.02) (0.08) 0.15
Net realized gains (losses) (in dollars per share) (0.09) 0 (0.04) 0.04
Net increase (decrease) in net assets resulting from operations (in dollars per share) 0.41 0.47 1.23 1.62
Distributions of net investment income to shareholders (in dollars per share) (0.41) (0.49) (1.3484) (1.4315)
Distributions in excess of net investment income (in dollars per share) (0.14) (0.06) (0.30) (0.22)
Net asset value at end of period (in dollars per share) $ 23.14 $ 23.53 $ 23.14 $ 23.53
Total return 1.79% 2.00% 5.38% 7.09%
Common shares outstanding at beginning of period (in shares) 52,027,000 34,601,000 44,323,000 20,787,000
Common shares outstanding at end of period (in shares) 54,922,000 40,803,000 54,922,000 40,803,000
Net assets at the beginning of the period $ 1,211,427 $ 817,091 $ 1,044,424 $ 489,821
Net assets at end of period 1,271,064 960,135 1,271,064 960,135
Average net assets $ 1,268,911 $ 923,776 $ 1,191,417 $ 763,420
Ratio of net investment income to average net assets 1.81% 2.08% 5.77% 6.07%
Ratio of total expenses to average net assets 1.87% 2.05% 6.01% 6.04%
Ratio of net expenses to average net assets 1.87% 2.05% 6.01% 6.10%
Ratio of portfolio turnover to average investments at fair value 6.89% 10.13% 22.31% 25.67%
Weighted average outstanding debt $ 2,042,351 $ 1,366,868 $ 2,027,190 $ 1,035,128
Average debt per share (in dollars per share) $ 11.09 $ 11.68 $ 12.61 $ 10.58
Asset coverage ratio 275.22% 278.60% 275.22% 278.60%
Class D shares        
Investment Company, Financial Highlights [Roll Forward]        
Net asset value at beginning of period (in dollars per share) $ 23.28 $ 23.61 $ 23.56 $ 23.56
Net investment income (in dollars per share) 0.45 0.53 1.46 1.54
Net unrealized appreciation (depreciation) (in dollars per share) 0.09 (0.02) (0.08) 0.15
Net realized gains (losses) (in dollars per share) (0.09) 0 (0.04) 0.04
Net increase (decrease) in net assets resulting from operations (in dollars per share) 0.45 0.51 1.34 1.73
Distributions of net investment income to shareholders (in dollars per share) (0.45) (0.53) (1.4566) (1.5394)
Distributions in excess of net investment income (in dollars per share) (0.14) (0.06) (0.30) (0.22)
Net asset value at end of period (in dollars per share) $ 23.14 $ 23.53 $ 23.14 $ 23.53
Total return 1.94% 2.16% 5.86% 7.57%
Common shares outstanding at beginning of period (in shares) 157,000 53,000 81,000 6,000
Common shares outstanding at end of period (in shares) 158,000 74,000 158,000 74,000
Net assets at the beginning of the period $ 3,646 $ 1,254 $ 1,916 $ 146
Net assets at end of period 3,663 1,735 3,663 1,735
Average net assets $ 3,665 $ 1,507 $ 3,046 $ 964
Ratio of net investment income to average net assets 1.97% 2.23% 6.25% 6.51%
Ratio of total expenses to average net assets 1.71% 1.91% 5.58% 5.61%
Ratio of net expenses to average net assets 1.71% 1.91% 5.58% 5.67%
Ratio of portfolio turnover to average investments at fair value 6.89% 10.13% 22.31% 25.67%
Weighted average outstanding debt $ 2,042,351 $ 1,366,868 $ 2,027,190 $ 1,035,128
Average debt per share (in dollars per share) $ 11.09 $ 11.68 $ 12.61 $ 10.58
Asset coverage ratio 275.22% 278.60% 275.22% 278.60%