v3.26.1
Summary of Estimated Fair Values of Bonds Held on Deposit (Parenthetical) (Detail) - USD ($)
$ in Thousands
Mar. 31, 2026
Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]    
Cash and cash equivalents $ 34,830 $ 65,542
Remainder Related to Bonds Available for Sale    
Debt Securities, Available-for-Sale [Line Items]    
Cash and cash equivalents $ 3,800 $ 5,800