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Loans and Allowance for Loan Losses - Summary of Primary Segments of ALLL, Loans Individually and Collectively Evaluated for Impairment (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Financing Receivable Impaired [Line Items] |  |  |  |  |
ALL, beginning of period | $ 13,402 | $ 4,897 | $ 13,827 | [1] | $ 4,572
Charge-offs | (991) | (255) | (1,625) |  | (574)
Recoveries | 596 | 64 | 805 |  | 133
Provision for loan losses |  | 3,500 |  |  | 4,075
ALL, end of period | 13,007 | 8,206 | 13,007 |  | 8,206
Individually evaluated for impairment | 444 |  | 444 |  |
Collectively evaluated for impairment | 12,563 |  | 12,563 |  |
Commercial and Industrial [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
ALL, beginning of period | 3,459 |  | 3,762 |  |
Charge-offs | (857) |  | (1,216) |  |
Recoveries | 394 |  | 450 |  | 1
Provision for loan losses | 502 |  | 502 |  |
ALL, end of period | 3,498 |  | 3,498 |  |
Collectively evaluated for impairment | 3,498 |  | 3,498 |  |
Construction, Commercial [Member] | Real Estate [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
ALL, beginning of period | 960 |  | 960 |  |
Provision for loan losses | (208) |  | (208) |  |
ALL, end of period | 752 |  | 752 |  |
Collectively evaluated for impairment | 752 |  | 752 |  |
Construction, Residential [Member] | Real Estate [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
ALL, beginning of period | 150 |  | 150 |  |
Provision for loan losses | (72) |  | (72) |  |
ALL, end of period | 78 |  | 78 |  |
Collectively evaluated for impairment | 78 |  | 78 |  |
Mortgage, Commercial [Member] | Real Estate [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
ALL, beginning of period | 4,215 |  | 4,215 |  |
Recoveries | 79 |  | 79 |  |
Provision for loan losses | 1,953 |  | 1,953 |  |
ALL, end of period | 6,247 |  | 6,247 |  |
Individually evaluated for impairment | 387 |  | 387 |  |
Collectively evaluated for impairment | 5,860 |  | 5,860 |  |
Mortgage, Residential [Member] | Real Estate [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
ALL, beginning of period | 1,485 |  | 1,481 |  |
Charge-offs | (1) |  | (13) |  |
Recoveries | 8 |  | 24 |  |
Provision for loan losses | (734) |  | (734) |  |
ALL, end of period | 758 |  | 758 |  |
Individually evaluated for impairment | 57 |  | 57 |  |
Collectively evaluated for impairment | 701 |  | 701 |  |
Mortgage, Farmland [Member] | Real Estate [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
ALL, beginning of period | 18 |  | 18 |  |
Provision for loan losses | 5 |  | 5 |  |
ALL, end of period | 23 |  | 23 |  |
Collectively evaluated for impairment | 23 |  | 23 |  |
Consumer [Member] |  |  |  |  |
Financing Receivable Impaired [Line Items] |  |  |  |  |
ALL, beginning of period | 3,115 |  | 3,241 |  |
Charge-offs | (133) | (255) | (396) |  | (574)
Recoveries | 115 | $ 64 | 252 |  | $ 132
Provision for loan losses | (1,446) |  | (1,446) |  |
ALL, end of period | 1,651 |  | 1,651 |  |
Collectively evaluated for impairment | $ 1,651 |  | $ 1,651 |  |
[1] | Derived from audited December 31, 2020 Consolidated Financial Statements.

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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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