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Debt - Summary of SBIC Investments (Details) $ in Thousands | Mar. 31, 2025 USD ($) firm | Dec. 31, 2024 USD ($) firm
--- | --- | ---
Schedule Of Investments [Line Items] |  |
Fair value of investments (in millions) | $ 3,924,450 | $ 3,659,978
HC IV |  |
Schedule Of Investments [Line Items] |  |
Investments held by number of companies | firm | 35 | 33
Fair value of investments (in millions) | $ 376,100 | $ 377,700
Percentage of fair value of investments based on the Company's total investment portfolio | 9.60% | 10.30%
Tangible assets (in millions) | $ 381,400 | $ 382,900
Percentage of tangible assets based on the Company's total assets | 9.50% | 10.00%
Hercules SBIC V, L.P. |  |
Schedule Of Investments [Line Items] |  |
Investments held by number of companies | firm | 14 | 11
Fair value of investments (in millions) | $ 194,700 | $ 155,600
Percentage of fair value of investments based on the Company's total investment portfolio | 5.00% | 4.30%
Tangible assets (in millions) | $ 197,600 | $ 157,800
Percentage of tangible assets based on the Company's total assets | 4.90% | 4.10%

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