Annual report [Section 13 and 15(d), not S-K Item 405]

Debt - Summary of SBIC Investments (Details)

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Debt - Summary of SBIC Investments (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
USD ($)
firm
Dec. 31, 2024
USD ($)
firm
Debt Instrument [Line Items]    
Fair value of investments (in millions) $ 4,466,647 $ 3,659,978
HC IV    
Debt Instrument [Line Items]    
Number of investments held | firm 39 33
Fair value of investments (in millions) $ 404,800 $ 377,700
Percentage of fair value of investments based on the Company's total investment portfolio 9.10% 10.30%
Tangible assets (in millions) $ 421,200 $ 382,900
Percentage of tangible assets based on the Company's total assets 9.20% 10.00%
SBIC V    
Debt Instrument [Line Items]    
Number of investments held | firm 28 11
Fair value of investments (in millions) $ 277,600 $ 155,600
Percentage of fair value of investments based on the Company's total investment portfolio 6.20% 4.30%
Tangible assets (in millions) $ 283,100 $ 157,800
Percentage of tangible assets based on the Company's total assets 6.20% 4.10%