Intangible Assets and Goodwill - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 36,648	$ 30,783
Accumulated Amortization	(15,785)	(13,217)
Net Carrying Amount	20,863	17,566
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	33,298	27,433
Accumulated Amortization	(12,765)	(10,311)
Net Carrying Amount	20,533	17,122
Customer Relationship Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,350	3,350
Accumulated Amortization	(3,020)	(2,906)
Net Carrying Amount	$ 330	$ 444