Intangible Assets and Goodwill - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 30,783	$ 36,761
Accumulated Amortization	(13,217)	(17,762)
Net Carrying Amount	17,566	18,999
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	27,433	33,411
Accumulated Amortization	(10,311)	(15,076)
Net Carrying Amount	17,122	18,335
Customer Relationship Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,350	3,350
Accumulated Amortization	(2,906)	(2,686)
Net Carrying Amount	$ 444	$ 664