Goodwill and Other Intangibles - Additional Information (Detail) - USD ($) |
12 Months Ended | ||||
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Oct. 27, 2016 |
Aug. 31, 2014 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
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| Finite-Lived Intangible Assets [Line Items] | |||||
| Goodwill impairment | $ 0 | ||||
| Intangible asset impairment charges | 0 | $ 0 | $ 0 | ||
| Core deposit intangible | |||||
| Finite-Lived Intangible Assets [Line Items] | |||||
| Intangible assets amortization expense | $ 261,000 | $ 309,000 | $ 362,000 | ||
| 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 The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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