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Consolidated Statements of Changes In Shareholders' Equity (Parenthetical) - shares | 6 Months Ended
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Jun. 30, 2018 | Jun. 30, 2017
Stock issued during period, shares, Scottdale shareholders | 1,878,827 |
Stock issued during period shares, Director Stock Purchase Plans | 1,819 |
Common Stock [Member] |  |
Stock issued during period, shares, Employee Stock Purchase Plans | 1,655 | 1,940

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