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Acquired Credit Impaired Loans, Outstanding Balance and Carrying Value for Acquired Credit Impaired Loans (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018 | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities, Accretable Yield | $ 719 | $ 743 | $ 635 | $ 669
Loans gross | 1,207,134 | 1,198,623 |  |
Loans, net | 1,203,008 | 1,194,577 |  |
Less allowance for loan losses | 4,126 | 4,046 |  |
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities [Abstract] |  |  |  |
Outstanding balance | 12,860 | 13,371 |  |
Carrying amount | 10,354 | 10,802 |  |
Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 10,361 | 10,802 |  |
Loans, net | 10,354 | 10,802 |  |
Less allowance for loan losses | 7 | 0 |  |
Other [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 344 | 336 |  |
Residential real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 3,193 | 3,229 |  |
Commercial, secured by real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 6,219 | 6,315 |  |
Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 605 | 922 |  |
First Capital Bancshares, Inc. [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 1,720 | 1,742 |  |
Loans, net | 1,720 | 1,742 |  |
Less allowance for loan losses | 0 | 0 |  |
First Capital Bancshares, Inc. [Member] | Other [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 0 | 0 |  |
First Capital Bancshares, Inc. [Member] | Residential real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 900 | 911 |  |
First Capital Bancshares, Inc. [Member] | Commercial, secured by real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 809 | 818 |  |
First Capital Bancshares, Inc. [Member] | Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 11 | 13 |  |
Columbus First Bancorp, Inc. [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 4,263 | 4,336 |  |
Loans, net | 4,256 | 4,336 |  |
Less allowance for loan losses | 7 | 0 |  |
Columbus First Bancorp, Inc. [Member] | Other [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 0 | 0 |  |
Columbus First Bancorp, Inc. [Member] | Residential real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 1,376 | 1,376 |  |
Columbus First Bancorp, Inc. [Member] | Commercial, secured by real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 2,522 | 2,554 |  |
Columbus First Bancorp, Inc. [Member] | Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 365 | 406 |  |
Eaton National Bank & Trust Co. [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 2,851 | 3,170 |  |
Loans, net | 2,851 | 3,170 |  |
Less allowance for loan losses | 0 | 0 |  |
Eaton National Bank & Trust Co. [Member] | Other [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 344 | 336 |  |
Eaton National Bank & Trust Co. [Member] | Residential real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 765 | 784 |  |
Eaton National Bank & Trust Co. [Member] | Commercial, secured by real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 1,513 | 1,547 |  |
Eaton National Bank & Trust Co. [Member] | Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 229 | 503 |  |
BNB Bancorp, Inc [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 1,527 | 1,554 |  |
Loans, net | 1,527 | 1,554 |  |
Less allowance for loan losses | 0 | 0 |  |
BNB Bancorp, Inc [Member] | Other [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 0 | 0 |  |
BNB Bancorp, Inc [Member] | Residential real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 152 | 158 |  |
BNB Bancorp, Inc [Member] | Commercial, secured by real estate [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | 1,375 | 1,396 |  |
BNB Bancorp, Inc [Member] | Commercial Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Loans gross | $ 0 | $ 0 |  |

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- Definition Amount of the excess of a loan's cash flows expected to be collected over the investor's initial investment in acquired loans not accounted for as debt securities with evidence of deterioration of credit quality. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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- Definition The recorded balance, net of any applicable reductions (for example, unamortized accretable yield and allowance for loan losses). This relates to loans not accounted for debt securities with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 + Details
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- Definition The undiscounted sum of all amounts, including amounts deemed principal, interest, fees, penalties, and other under the loan, owed to the investor at the reporting date, whether or not currently due and whether or not any such amounts have been written or charged off by the investor. This relates to loans not accounted for as debt securities, with evidence of deterioration of credit quality since origination that were acquired by completion of a transfer for which it is probable, at acquisition, that the investor will be unable to collect all contractually required payments receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 15 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82894507&loc=d3e13503-111538 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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