Intangible Assets and Goodwill - Summary of Intangible Assets (Detail) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 39,504	$ 30,783
Accumulated Amortization	(14,048)	(13,217)
Net Carrying Amount	25,456	17,566
Core Deposit Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	36,154	27,433
Accumulated Amortization	(11,087)	(10,311)
Net Carrying Amount	25,067	17,122
Customer Relationship Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,350	3,350
Accumulated Amortization	(2,961)	(2,906)
Net Carrying Amount	$ 389	$ 444