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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Mar. 25, 2022
Finite-Lived Intangible Assets [Line Items]
Impairment charges	$ 0
Core deposit intangibles
Finite-Lived Intangible Assets [Line Items]
Core deposit intangibles balance	6,432,000	$ 10,552,000
Valley Republic Bancorp
Finite-Lived Intangible Assets [Line Items]
Additions to core deposit intangibles			$ 10,600,000
FNBB
Finite-Lived Intangible Assets [Line Items]
Additions to core deposit intangibles	$ 27,600,000

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