v3.26.1
Information for Financial Instruments on Which Fair Value Option was Elected (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Fair Value, Option, Quantitative Disclosures [Line Items]    
Excess (Deficiency) of fair value over principal $ (35,119) $ (43,200)
Debt Securities    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Excess (Deficiency) of fair value over principal (37,947) (48,690)
Loans and Receivables    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Excess (Deficiency) of fair value over principal $ 2,828 $ 5,490