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Commitments and Contingencies - Summary of Bank's Commitments and Contingent Liabilities (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit |  |
Real estate construction loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 231,697 | 227,876
Real estate mortgage loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 231,509 | 202,306
Standby letters of credit |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 14,543 | 15,056
Commercial Loan |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 473,971 | 462,422
Consumer loans |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | 539,670 | 534,223
Deposit account overdraft privilege |  |
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items] |  |
Commitments to extend credit | $ 122,965 | $ 110,813

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- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.25) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.(a),19) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.17) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
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