Securities - Additional Information (Detail)	3 Months Ended
Mar. 31, 2026 USD ($) Security	Mar. 31, 2025 USD ($)	Dec. 31, 2025 USD ($)
Debt and Equity Securities, FV-NI [Line Items]
Fair value of pledged securities	$ 133,000,000		$ 134,000,000
Restricted stock investment in FHLB stock	1,100,000		1,100,000
Federal Reserve Bank stock	471,000		471,000
Proceeds from sale of available-for-sale securities	$ 0	$ 0
Number of securities in an unrealized loss position, Total \| Security	93
Number of securities in continuous unrealized loss position, 12 months or more \| Security	76
Held to maturity security, allowance for credit loss	$ 0		0
Total available-for-sale securities	128,831,000		$ 132,217,000
US Treasury Securities And US Government Sponsored Agency Bonds [Member]
Debt and Equity Securities, FV-NI [Line Items]
Total available-for-sale securities	104,000,000
Non-agency Debt Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Total available-for-sale securities	25,000,000
Non-agency Debt Securities [Member] \| Non-rated Debt Securities [Member]
Debt and Equity Securities, FV-NI [Line Items]
Total available-for-sale securities	$ 7,000,000

Number Of Securities In Unrealized Loss Position

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Number Of Securities In Unrealized Loss Position For Period Of One Year Or Greater

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Amount of 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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Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity).

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Fair value of the securities pledged as collateral against securities loaned.

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