Loans and the Allowance for Credit Losses - Loans Identified as TDRs (Detail) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022 USD ($) Contract	Sep. 30, 2022 USD ($) Contract
Financing Receivable, Modifications [Line Items]
Number of Modifications \| Contract	1	3
Pre-Modification Outstanding Recorded Investment	$ 1,097	$ 1,370
Post-Modification Outstanding Recorded Investment	$ 1,075	$ 1,075
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications \| Contract	1	3
Pre-Modification Outstanding Recorded Investment	$ 1,097	$ 1,370
Post-Modification Outstanding Recorded Investment	$ 1,075	$ 1,075
Commercial Real Estate [Member] \| Commercial Real Estate - Land and Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications \| Contract		1
Pre-Modification Outstanding Recorded Investment		$ 84
Commercial Real Estate [Member] \| Commercial Real Estate - Improved Property [Member]
Financing Receivable, Modifications [Line Items]
Number of Modifications \| Contract	1	2
Pre-Modification Outstanding Recorded Investment	$ 1,097	$ 1,286
Post-Modification Outstanding Recorded Investment	$ 1,075	$ 1,075

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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