Securities - Additional Information (Detail) $ in Thousands	Dec. 31, 2024 USD ($) Security	Dec. 31, 2023 USD ($)
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Carrying value of pledged securities	$ 206,600	$ 211,616
Available for sale term	3 years
Number of securities in portfolio with unrealized losses \| Security	508
Estimated fair values of debt securities	$ 574,516	447,874
Unrealized losses of debt securities	62,873	57,679
Agencies of U.S. Federal Government [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Estimated fair values of debt securities	301,883
Unrealized losses of debt securities	35,875
State Municipalities [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]
Estimated fair values of debt securities	272,633	181,459
Unrealized losses of debt securities	$ 26,998	$ 23,578

Amount of restricted investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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