Goodwill and Other Intangible Assets - Components of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 20,729	$ 21,538
Accumulated amortization	13,401	13,229
Net carrying amount	7,328	8,309
Core Deposits [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	5,268	6,788
Accumulated amortization	5,220	6,597
Net carrying amount	48	191
Customer Related Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	2,476	2,476
Accumulated amortization	1,674	1,348
Net carrying amount	802	1,128
Servicing Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	12,985	12,274
Accumulated amortization	6,507	5,284
Net carrying amount	6,478	6,990
Valuation allowance included in accumulated amortization	$ 307	$ 7	$ 98	$ 5

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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