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Loans (Details 1) - National Bancshares Corporation - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable Impaired [Line Items] |  |
Total outstanding balance | $ 1,131 | $ 1,191
Carrying amount, net of allowance | 849 | 903
Commercial real estate, Non-owner occupied | Commercial real estate |  |
Financing Receivable Impaired [Line Items] |  |
Loans acquired with deteriorated credit quality | 275 | 292
Commercial, Commercial and industrial | Commercial |  |
Financing Receivable Impaired [Line Items] |  |
Loans acquired with deteriorated credit quality | $ 856 | $ 899

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