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Borrowings - SBI Bonds (Details)
12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2025
JPY (¥)
Dec. 31, 2024
JPY (¥)
Jul. 25, 2016
USD ($)
Jul. 25, 2016
JPY (¥)
Debt Instrument [Line Items]              
Outstanding principal amount $ 2,067,334,000 $ 1,767,265,000          
SBI bonds              
Debt Instrument [Line Items]              
Outstanding principal amount 22,334,000 22,265,000          
VFH | SBI bonds | SBI Bonds              
Debt Instrument [Line Items]              
Face amount           $ 33,100,000 ¥ 3,500,000,000
Outstanding principal amount 22,300,000 22,300,000   ¥ 3,500,000,000 ¥ 3,500,000,000    
Gain (loss) on due to change in currency rates $ (100,000) $ 2,600,000 $ 1,900,000