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CONSOLIDATED SCHEDULE OF INVESTMENTS (Parenthetical) $ in Thousands | Mar. 31, 2023 USD ($) Firm | Dec. 31, 2022 USD ($) Firm
--- | --- | ---
Investment Holdings [Line Items] |  |
Investment, Basis Spread, Variable Rate | 8.00% | 7.50%
Tax basis of investments, gross, unrealized appreciation | $ 87,900 | $ 72,200
Tax basis of investments, gross, unrealized depreciation | 106,600 | 112,000
Tax basis of investments, unrealized appreciation (depreciation), net | 18,700 | 39,800
Tax basis of investments, cost for income tax purposes | 3,100,000 | 3,000,000
Investment Owned At Cost | 3,150,846 | 3,005,696
Investment Owned At Fair Value | $ 3,130,178 | $ 2,963,955
1-month LIBOR |  |
Investment Holdings [Line Items] |  |
Interest rate | 4.86% | 4.40%
3-month LIBOR |  |
Investment Holdings [Line Items] |  |
Interest rate | 5.19% | 4.77%
6-month LIBOR |  |
Investment Holdings [Line Items] |  |
Interest rate | 5.31% | 5.14%
1-month SOFR |  |
Investment Holdings [Line Items] |  |
Interest rate | 4.63% |
3-month SOFR |  |
Investment Holdings [Line Items] |  |
Interest rate | 4.51% |
6-month SOFR |  |
Investment Holdings [Line Items] |  |
Interest rate | 4.09% |
Common Stock | Fair Value Inputs Level1 [Member] |  |
Investment Holdings [Line Items] |  |
Number of publicly traded companies | Firm | 35 | 43
Warrant | Fair Value Inputs Level1 [Member] |  |
Investment Holdings [Line Items] |  |
Number of publicly traded companies | Firm | 24 | 27
Biotechnology Tools |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | $ 33,032 | $ 32,825
Media/Content/Info |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 9,956 | 35
Surgical Devices |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 4,189 | 3,038
Consumer & Business Products |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 2,593 | 2,821
Communications & Networking |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 107,201 | 101,833
Drug Delivery |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 23 | 90
Drug Discovery & Development |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 1,220,057 | 1,150,707
Medical Devices & Equipment |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 1,155 | 1,834
Information Services |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 62,039 | 60,759
Semiconductors |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 966 | 21,921
Healthcare Services Other |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 214,199 | 198,763
Manufacturing Technology |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 48,993 | 46,109
Diversified Financial Services |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 87,805 | 68,569
Sustainable And Renewable Technology |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 12,899 | 15,486
Software |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 828,712 | 798,264
Consumer And Business Services [Member] |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 474,883 | 439,384
Electronics & Computer Hardware |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | 21,476 | 21,517
Phathom Pharmaceuticals, Inc. | Royalty Contract |  |
Investment Holdings [Line Items] |  |
Investment Owned At Cost | 4,600 | 4,600
Investment Owned At Fair Value | 3,300 | 3,400
Black Crow AI, Inc. affiliates | Promissory Notes [Member] |  |
Investment Holdings [Line Items] |  |
Investment Owned Balance Principal Amount | 2,800 | 3,000
Senior Secured |  |
Investment Holdings [Line Items] |  |
Investment Owned At Fair Value | $ 2,910,526 | $ 2,741,388

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