v3.25.2
Summary of Significant Accounting Policies - Schedule of Changes in Investments (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Marketable Securities [Line Items]        
Beginning Balance     $ 1,794,758,336  
Ending Balance $ 1,792,334,843   1,792,334,843  
Level 3        
Marketable Securities [Line Items]        
Beginning Balance     1,765,787,785  
Ending Balance 1,774,909,707   1,774,909,707  
Level 3 | Independent Third-Party Valuation        
Marketable Securities [Line Items]        
Beginning Balance 1,746,562,673 $ 2,084,879,681 1,764,630,382 $ 1,506,246,606
Net realized and unrealized gains (losses) $ (40,875,339) $ (87,085,682) $ (48,959,565) (108,039,824)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Investments Gain (Loss) on Investments Gain (Loss) on Investments  
Acquisitions $ 114,297,332 $ 137,180,957 $ 159,493,094 737,668,840
Dispositions (46,232,362) (184,700,040) (101,411,607) (207,065,284)
Transfers into Level 3   2,795,614   27,512,314
Reclassifications within Level 3       (3,252,122)
Ending Balance 1,773,752,304 1,953,070,530 1,773,752,304 1,953,070,530
Net change in unrealized appreciation/depreciation during the period on investments still held at period end (included in net realized and unrealized gains/losses, above) $ (33,290,060) $ (79,731,357) $ (35,841,882) (108,064,839)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments  
Level 3 | Valuation Designee        
Marketable Securities [Line Items]        
Beginning Balance $ 1,157,403 $ 877,248 $ 1,157,403 844,615
Net realized and unrealized gains (losses)       32,087
Acquisitions       546
Ending Balance 1,157,403 877,248 1,157,403 877,248
Net change in unrealized appreciation/depreciation during the period on investments still held at period end (included in net realized and unrealized gains/losses, above) $ 0 $ 0 $ 0 $ 32,087
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments
Level 3 | Bank Debt | Independent Third-Party Valuation        
Marketable Securities [Line Items]        
Beginning Balance $ 1,511,035,364 $ 1,852,766,795 $ 1,549,242,872 $ 1,289,587,391
Net realized and unrealized gains (losses) $ (23,598,192) $ 81,402,083 $ (47,523,851) $ (74,411,433)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Investments Gain (Loss) on Investments Gain (Loss) on Investments Gain (Loss) on Investments
Acquisitions $ 81,074,012 $ 130,850,647 $ 121,482,589 $ 685,719,758
Dispositions (42,923,822) (179,133,867) (97,614,248) (199,278,802)
Transfers into Level 3   2,795,614   27,512,314
Reclassifications within Level 3       (3,252,122)
Ending Balance 1,525,587,362 1,725,877,106 1,525,587,362 1,725,877,106
Net change in unrealized appreciation/depreciation during the period on investments still held at period end (included in net realized and unrealized gains/losses, above) $ (16,497,886) $ (74,624,371) $ (34,410,339) $ (76,155,049)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments
Level 3 | Bank Debt | Valuation Designee        
Marketable Securities [Line Items]        
Beginning Balance $ 0 $ 0 $ 0 $ 0
Net realized and unrealized gains (losses)       0
Acquisitions       0
Ending Balance 0 0 0 0
Net change in unrealized appreciation/depreciation during the period on investments still held at period end (included in net realized and unrealized gains/losses, above) $ 0 $ 0 $ 0 $ 0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments
Level 3 | Other Corporate Debt | Independent Third-Party Valuation        
Marketable Securities [Line Items]        
Beginning Balance $ 62,109,147 $ 71,542,109 $ 64,772,456 $ 52,318,937
Net realized and unrealized gains (losses) $ 314,698 $ 59,452 $ (2,348,611) $ 803,441
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Investments Gain (Loss) on Investments Gain (Loss) on Investments Gain (Loss) on Investments
Acquisitions $ 0 $ 177,626 $ 0 $ 18,114,243
Dispositions (2,539,224) (5,542,566) (2,539,224) (5,000,000)
Transfers into Level 3   0   0
Reclassifications within Level 3       0
Ending Balance 59,884,621 66,236,621 59,884,621 66,236,621
Net change in unrealized appreciation/depreciation during the period on investments still held at period end (included in net realized and unrealized gains/losses, above) $ 314,175 $ 237,078 $ (2,349,135) $ 803,441
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments
Level 3 | Other Corporate Debt | Valuation Designee        
Marketable Securities [Line Items]        
Beginning Balance $ 0 $ 0 $ 0 $ 0
Net realized and unrealized gains (losses)       0
Acquisitions       0
Ending Balance 0 0 0 0
Net change in unrealized appreciation/depreciation during the period on investments still held at period end (included in net realized and unrealized gains/losses, above) $ 0 $ 0 $ 0 $ 0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments
Level 3 | Equity Securities | Independent Third-Party Valuation        
Marketable Securities [Line Items]        
Beginning Balance $ 173,418,162 $ 160,570,777 $ 150,615,054 $ 164,340,278
Net realized and unrealized gains (losses) $ (17,591,845) $ (5,743,051) $ 912,897 $ (34,431,832)
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Gain (Loss) on Investments Gain (Loss) on Investments Gain (Loss) on Investments Gain (Loss) on Investments
Acquisitions $ 33,223,320 $ 6,152,684 $ 38,010,505 $ 33,834,839
Dispositions (769,316) (23,607) (1,258,135) (2,786,482)
Transfers into Level 3   0   0
Reclassifications within Level 3       0
Ending Balance 188,280,321 160,956,803 188,280,321 160,956,803
Net change in unrealized appreciation/depreciation during the period on investments still held at period end (included in net realized and unrealized gains/losses, above) $ (17,106,349) $ (5,344,064) $ 917,592 $ (32,713,231)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments
Level 3 | Equity Securities | Valuation Designee        
Marketable Securities [Line Items]        
Beginning Balance $ 1,157,403 $ 877,248 $ 1,157,403 $ 844,615
Net realized and unrealized gains (losses)       32,087
Acquisitions       546
Ending Balance 1,157,403 877,248 1,157,403 877,248
Net change in unrealized appreciation/depreciation during the period on investments still held at period end (included in net realized and unrealized gains/losses, above) $ 0 $ 0 $ 0 $ 32,087
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments Unrealized Gain (Loss) on Investments