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CONSOLIDATED SCHEDULE OF INVESTMENTS (Parenthetical) $ in Thousands | Jun. 30, 2023 USD ($) | Dec. 31, 2022 USD ($) Firm
--- | --- | ---
Investment Holding [Line Items] |  |
Investment, Basis Spread, Variable Rate | 8.25% | 7.50%
Tax basis of investments, gross, unrealized appreciation | $ 92,500 | $ 72,200
Tax basis of investments, gross, unrealized depreciation | 92,000 | 112,000
Tax basis of investments, unrealized appreciation (depreciation), net | 500 | 39,800
Tax basis of investments, cost for income tax purposes | 3,100,000 | 3,000,000
Investment Owned, Cost | 3,114,097 | 3,005,696
Investment Owned, Fair Value | $ 3,112,789 | $ 2,963,955
1-month LIBOR |  |
Investment Holding [Line Items] |  |
Interest rate | 5.22% | 4.40%
3-month LIBOR |  |
Investment Holding [Line Items] |  |
Interest rate | 5.55% | 4.77%
6-month LIBOR |  |
Investment Holding [Line Items] |  |
Interest rate | 5.76% | 5.14%
1-month SOFR |  |
Investment Holding [Line Items] |  |
Interest rate | 5.07% |
3-month SOFR |  |
Investment Holding [Line Items] |  |
Interest rate | 5.00% |
6-month SOFR |  |
Investment Holding [Line Items] |  |
Interest rate | 4.78% |
Common Stock | Fair Value, Inputs, Level 1 [Member] |  |
Investment Holding [Line Items] |  |
Number of publicly traded companies | Firm |  | 43
Warrants | Fair Value, Inputs, Level 1 [Member] |  |
Investment Holding [Line Items] |  |
Number of publicly traded companies | Firm |  | 27
Biotechnology Tools |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | $ 33,465 | $ 32,825
Media/Content/Info |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 11,542 | 35
Surgical Devices |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 731 | 3,038
Consumer & Business Products |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 1,294 | 2,821
Communications & Networking |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 105,343 | 101,833
Drug Delivery |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 23 | 90
Drug Discovery & Development |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 1,137,725 | 1,150,707
Medical Devices & Equipment |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 1,052 | 1,834
Information Services |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 73,306 | 60,759
Semiconductors |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 1,188 | 21,921
Healthcare Services Other |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 220,673 | 198,763
Manufacturing Technology |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 49,596 | 46,109
Diversified Financial Services |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 94,077 | 68,569
Sustainable And Renewable Technology |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 11,333 | 15,486
Software |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 891,438 | 798,264
Consumer And Business Services [Member] |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 459,276 | 439,384
Electronics & Computer Hardware |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | 20,727 | 21,517
Phathom Pharmaceuticals, Inc. | Royalty Contract |  |
Investment Holding [Line Items] |  |
Investment Owned, Cost | 4,600 | 4,600
Investment Owned, Fair Value | 3,100 | 3,400
Black Crow AI, Inc. affiliates | Promissory Notes [Member] |  |
Investment Holding [Line Items] |  |
Investment Owned, Balance, Principal Amount | 2,400 | 3,000
Senior Secured |  |
Investment Holding [Line Items] |  |
Investment Owned, Fair Value | $ 2,878,923 | $ 2,741,388

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