Credit Quality - Schedule of Troubled Debt Restructurings, Segregated by Class of Loans (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) Contract	Sep. 30, 2021 USD ($) Contract	Sep. 30, 2022 USD ($) Contract	Sep. 30, 2021 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	2	3	6
Pre-Modification Outstanding Recorded Investment	$ 144	$ 576	$ 3,077	$ 8,046
Post-Modification Outstanding Recorded Investment	$ 144	$ 576	$ 2,856	$ 7,986
Construction & Land Development [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Commercial Real Estate [Member] | Owner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	1	1	2	2
Pre-Modification Outstanding Recorded Investment	$ 144	$ 103	$ 2,945	$ 1,043
Post-Modification Outstanding Recorded Investment	$ 144	$ 103	$ 2,856	$ 1,196
Commercial Real Estate [Member] | Nonowner-Occupied [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0	0	2
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 6,349
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 6,136
Other Commercial [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0	1	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 132	$ 181
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 181
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	1	0	1
Pre-Modification Outstanding Recorded Investment	$ 0	$ 473	$ 0	$ 473
Post-Modification Outstanding Recorded Investment	$ 0	$ 473	$ 0	$ 473
Consumer [Member] | Bankcard [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Consumer [Member] | Other Consumer [Member]
Financing Receivable, Modifications [Line Items]
Number of Contracts | Contract	0	0	0	0
Pre-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0
Post-Modification Outstanding Recorded Investment	$ 0	$ 0	$ 0	$ 0