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Loans and Allowance for Credit Losses on Loans - Information About Loans And The ALL By Portfolio Segment Are Summarized (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021
Individually evaluated for impairment	$ 188		$ 278
Collectively evaluated for impairment	414,324		399,778
Total	414,512		400,056
Collectively evaluated for impairment	3,319		3,581
Total	3,319	$ 3,287	3,581	$ 3,644	$ 3,642	$ 3,590
CRE [Member]
Collectively evaluated for impairment	88,051		80,506
Total	88,051		80,506
Collectively evaluated for impairment	806		942
Total	806	725	942	1,019	894	833
MF [Member]
Collectively evaluated for impairment	7,787		8,185
Total	7,787		8,185
Collectively evaluated for impairment	49		54
Total	49	49	54	57	78	80
C+I [Member]
Collectively evaluated for impairment	24,168		24,059
Total	24,168		24,059
Collectively evaluated for impairment	277		184
Total	277	281	184	208	218	194
ADL [Member]
Collectively evaluated for impairment	14,999		18,490
Total	14,999		18,490
Collectively evaluated for impairment	70		138
Total	70	96	138	110	116	178
RES [Member]
Individually evaluated for impairment	185		273
Collectively evaluated for impairment	259,377		251,193
Total	259,562		251,466
Collectively evaluated for impairment	1,910		2,048
Total	1,910	1,904	2,048	2,025	2,188	2,139
HELOC [Member]
Collectively evaluated for impairment	12,121		10,161
Total	12,121		10,161
Collectively evaluated for impairment	85		81
Total	85	88	81	87	62	63
CON [Member]
Individually evaluated for impairment	3		5
Collectively evaluated for impairment	7,821		7,184
Total	7,824		7,189
Collectively evaluated for impairment	109		100
Total	109	119	100	111	$ 86	75
Unallocated [Member]
Collectively evaluated for impairment	13		34
Total	$ 13	$ 25	$ 34	$ 27		$ 28

X

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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