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Investment Securities - Additional Information (Detail) $ in Thousands	Jun. 30, 2025 USD ($) Securities	Dec. 31, 2024 USD ($)
Marketable Securities [Line Items]
Number of securities less than 12 months | Securities	31
Number of securities more than 12 months | Securities	161
Unrealized losses securities more than 12 months	$ 10,246	$ 11,719
Securities pledged as collateral	$ 0	0
Number of investment securities | Securities	270
Municipal Securities [Member]
Marketable Securities [Line Items]
Number of securities more than 12 months | Securities	106
Unrealized losses securities more than 12 months	$ 34,800
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 3,600
Mortgage-backed securities [Member]
Marketable Securities [Line Items]
Number of securities more than 12 months | Securities	50
Unrealized losses securities more than 12 months	$ 28,000
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	5,800
U.S. government agency securities [Member]
Marketable Securities [Line Items]
Unrealized losses securities more than 12 months	859	1,077
Debt Securities, Available-for-Sale, Allowance for Credit Loss	$ 0	$ 0
Agency Securities [Member]
Marketable Securities [Line Items]
Number of securities more than 12 months | Securities	1
Unrealized losses securities more than 12 months	$ 5,400
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 859
Mortgage-Backed Securities, Issued by Private Enterprises [Member]
Marketable Securities [Line Items]
Number of securities more than 12 months | Securities	4
Unrealized losses securities more than 12 months	$ 85
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 1

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