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Loans (Details 1) - National Bancshares Corporation - USD ($) $ in Thousands | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Financing Receivable Impaired [Line Items] |  |
Total outstanding balance | $ 2,249 | $ 2,338
Carrying amount, net of allowance | 1,815 | 1,864
Commercial real estate, Owner occupied | Commercial real estate |  |
Financing Receivable Impaired [Line Items] |  |
Loans acquired with deteriorated credit quality | 707 | 689
Commercial real estate, Non-owner occupied | Commercial real estate |  |
Financing Receivable Impaired [Line Items] |  |
Loans acquired with deteriorated credit quality | 394 | 436
Commercial, Commercial and industrial | Commercial |  |
Financing Receivable Impaired [Line Items] |  |
Loans acquired with deteriorated credit quality | $ 1,148 | $ 1,213

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