v3.26.3
Condensed Consolidated Statements of Changes in Net Assets - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Investment Company, Net Assets [Roll Forward]        
Beginning balance $ 5,938,733 $ 6,288,296 $ 6,245,175 $ 6,076,521
Issuance of Common Shares, net of offering and underwriting costs 0 21,206 0 270,048
Reinvestment of dividends 7,392 [1] 5,474 [2] 24,215 15,984 [2]
Net investment income after tax expense 158,136 189,474 510,836 554,172
Net change in unrealized appreciation (depreciation), net of income tax (provision) benefit 190,061 (36,323) (101,336) (91,497)
Net realized gain (loss), net of tax expense (231,354) (20,714) (257,925) (25,387)
Dividends declared and payable from net investment income (179,387) (177,837) (537,384) (530,265)
Ending balance 5,883,581 6,269,576 5,883,581 6,269,576
Par Amount        
Investment Company, Net Assets [Roll Forward]        
Beginning balance 233 230 232 222
Issuance of Common Shares, net of offering and underwriting costs 0 1 0 9
Reinvestment of dividends     1  
Ending balance 233 231 233 231
Additional Paid in Capital        
Investment Company, Net Assets [Roll Forward]        
Beginning balance 6,064,572 6,009,106 6,047,750 5,749,762
Issuance of Common Shares, net of offering and underwriting costs 0 21,205 0 270,039
Reinvestment of dividends 7,392 [1] 5,474 [2] 24,214 15,984 [2]
Ending balance 6,071,964 6,035,785 6,071,964 6,035,785
Distributable Earnings (Loss)        
Investment Company, Net Assets [Roll Forward]        
Beginning balance (126,072) 278,960 197,193 326,537
Net investment income after tax expense 158,136 189,474 510,836 554,172
Net change in unrealized appreciation (depreciation), net of income tax (provision) benefit 190,061 (36,323) (101,336) (91,497)
Net realized gain (loss), net of tax expense (231,354) (20,714) (257,925) (25,387)
Dividends declared and payable from net investment income (179,387) (177,837) (537,384) (530,265)
Ending balance $ (188,616) $ 233,560 $ (188,616) $ 233,560
[1] The par amount of the shares is less than 1,000 and rounds to zero.
[2] The par amount of the shares is less than 1,000 and rounds to zero.