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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

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