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Investment Securities - Summary of Amortized Cost and Estimated Fair Value (Detail) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	$ 234,602	$ 259,658
Gross Unrealized Gains	753	446
Gross Unrealized Losses	(10,590)	(12,933)
Fair value	224,763	247,171
Mortgage-backed securities - U.S. Government Sponsored Enterprises (GSEs) [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	175,736	197,792
Gross Unrealized Gains	743	422
Gross Unrealized Losses	(6,033)	(7,669)
Fair value	170,445	190,545
U.S. government agency securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	11,260	11,260
Gross Unrealized Gains	1	17
Gross Unrealized Losses	(919)	(1,077)
Fair value	10,341	10,200
Obligations of state and political subdivisions [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	43,220	43,895
Gross Unrealized Gains	1	1
Gross Unrealized Losses	(3,635)	(4,166)
Fair value	39,587	39,730
Small business association (SBA) securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	1,481	1,856
Gross Unrealized Gains	8	5
Gross Unrealized Losses	(1)	(4)
Fair value	1,487	1,857
US Treasury Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized cost	2,905	4,855
Gross Unrealized Gains	0	1
Gross Unrealized Losses	(2)	(17)
Fair value	$ 2,903	$ 4,839

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Amortized cost 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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