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Loans (Details 1) - National Bancshares Corporation - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable Impaired [Line Items] |  |
Total outstanding balance | $ 1,330 | $ 950
Carrying amount, net of allowance | 1,045 | 690
Commercial real estate, Non-owner occupied | Commercial real estate |  |
Financing Receivable Impaired [Line Items] |  |
Loans acquired with deteriorated credit quality | 648 | 225
Commercial, Commercial and industrial | Commercial |  |
Financing Receivable Impaired [Line Items] |  |
Loans acquired with deteriorated credit quality | $ 682 | $ 725

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