Quarterly report [Sections 13 or 15(d)]

Debt - Summary of SBIC Investments (Details)

v3.25.1
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%