Goodwill and Intangible Assets - Schedule of Mortgage Servicing Rights (MSRs) and Related Valuation Allowance (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Loan Servicing Rights:
Balance at Beginning of Period	$ 2,642	$ 2,246
Additions	145	194
Amortized to expense	(109)	(144)
Change in valuation allowance		72
Balance at End of Period	$ 2,678	2,224
Valuation allowance:
Balance at Beginning of Period		204
Additions expensed		72
Balance at End of Period		$ 276