Loans and Allowance for Credit Losses on Loans - Transactions In The Allowance For Loan Losses ("ALL") (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	$ 3,427	$ 3,517	$ 3,427	$ 3,486
(Release) provision for credit losses on loans	0		0	30
Recoveries	1		1	1
Balance	3,428	3,517	3,428	3,517
CRE [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	532	733	618	710
(Release) provision for credit losses on loans	(35)	(79)	(121)	(56)
Balance	497	654	497	654
MF [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	49	58	48	59
(Release) provision for credit losses on loans	(6)	(1)	(5)	(2)
Balance	43	57	43	57
C+I [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	170	200	183	233
(Release) provision for credit losses on loans	44	2	31	(31)
Balance	214	202	214	202
ADL [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	107	119	88	87
(Release) provision for credit losses on loans	12	(27)	31	5
Balance	119	92	119	92
RES [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	1,452	1,646	1,488	1,612
(Release) provision for credit losses on loans	13	(86)	(23)	(52)
Balance	1,465	1,560	1,465	1,560
HELOC [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	216	232	204	214
(Release) provision for credit losses on loans	18	5	30	23
Balance	234	237	234	237
CON [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	667	554	609	439
(Release) provision for credit losses on loans	(123)	(12)	(65)	102
Recoveries	1		1	1
Balance	545	542	545	542
Unallocated [Member]
Financing Receivable, Allowance for Credit Loss [Line Items]
Balance	234	(25)	189	132
(Release) provision for credit losses on loans	77	198	122	41
Balance	$ 311	$ 173	$ 311	$ 173