Goodwill and Other Intangibles - Additional Information (Detail) - USD ($) |
9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Oct. 27, 2016 |
Aug. 31, 2014 |
Sep. 30, 2021 |
Dec. 31, 2020 |
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| Finite-Lived Intangible Assets [Line Items] | ||||
| Impairment of goodwill and other intangible assets | $ 0 | |||
| Goodwill and other intangible assets triggering event | No triggering event has occurred subsequent to December 31, 2020 that would require a reassessment of goodwill and other intangible assets. | |||
| CBI Merger | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Goodwill | $ 11,000,000.0 | |||
| CBI Merger | Third-party originators intangible | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Intangible assets acquired | $ 483,000 | |||
| CBI Merger | Core deposit intangible | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Intangible assets acquired | $ 2,200,000 |
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- Definition Goodwill and other intangible assets triggering event. No definition available.
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- Definition 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. No definition available.
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill. No definition available.
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