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Acquisition of The Scottdale Bank and Trust Company (Allocation of the Purchase Price) (Details) - USD ($) | Jan. 08, 2018 | Sep. 30, 2018 | Dec. 31, 2017
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Assets acquired: |  |  |
Goodwill |  | $ 62,767,000 | $ 3,918,000
Scottdale Bank and Trust Company [Member] |  |  |
Assets acquired: |  |  |
Cash and cash equivalents | $ 67,817,000 |  |
Investment securities | 114,039,000 |  |
Restricted stock | 97,000 |  |
Loans | 70,769,000 |  |
Goodwill | 19,189,000 |  |
Core deposit intangible | 4,940,000 |  |
Premises and equipment | 1,496,000 |  |
Foreclosed assets | 11,000 |  |
Deferred income taxes | 1,050,000 |  |
Accrued interest receivable | 989,000 |  |
Other assets | 266,000 |  |
Total assets acquired | 280,663,000 |  |
Liabilities assumed: |  |  |
Deposits | 209,981,000 |  |
Accrued interest payable | 16,000 |  |
Other liabilities | 3,693,000 |  |
Total liabilities assumed | 213,690,000 |  |
Consideration paid | 66,973,000 |  |
Cash paid | 2,792,000 |  |
Fair value of common stock issued | $ 64,181,000 |  |

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