Allowance for Loan Losses - Schedule of Investment in Loans Receivable by Loan Class (Parenthetical) (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Financial Receivables [Line Items]
Total Gross Loans	$ 1,358,935	$ 1,249,435
Commercial & Industrial [Member]
Schedule Of Financial Receivables [Line Items]
Total Gross Loans	164,014	230,027
Commercial & Industrial [Member] \| Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member]
Schedule Of Financial Receivables [Line Items]
Total Gross Loans	$ 58,300	$ 135,200

Amount, before allowance and fees, of loans and leases receivable. Excludes loans and leases covered under loss sharing agreements.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=124259787&loc=d3e4428-111522

Name:	us-gaap_LoansAndLeasesReceivableBeforeFeesGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant