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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Jan. 31, 2021
Goodwill [Line Items] |  |  |
Goodwill | $ 26,826 | $ 19,620 |
Intangible amortization | 1,867 | 825 |
Net assets acquired | 7,742 | 2,581 |
Accumulated amortization of intangibles | 4,543 | 2,382 |
Mortgage servicing asset | 16,500 | 7,100 |
Core Deposits [Member] |  |  |
Goodwill [Line Items] |  |  |
Net assets acquired | 6,718 | 1,410 |
Accumulated amortization of intangibles | 2,908 | 1,366 |
Loan Servicing Assets Included In Other Amortization Intangibles [Member] |  |  |
Goodwill [Line Items] |  |  |
Accumulated amortization of intangibles | 362 | 209 |
Loan Servicing Assets Included In Interest And Fees On Loans [Member] |  |  |
Goodwill [Line Items] |  |  |
Intangible amortization | $ 266 | $ 189 |
Bay Banks Of Virginia Inc [Member] |  |  |
Goodwill [Line Items] |  |  |
Goodwill |  |  | $ 7,206
Bay Banks Of Virginia Inc [Member] | Core Deposits [Member] |  |  |
Goodwill [Line Items] |  |  |
Amortization of intangible assets | 10 years |  |
Net assets acquired | $ 6,900 |  |

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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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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