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Agreement and Plan of Merger (Narrative) (Details) - Scottdale Bank and Trust Company [Member] | Mar. 29, 2017 $ / shares
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Business Acquisition [Line Items] |
Per share price | $ 1,166
Volume-weighted average price, trading period | 10 days
Period prior to closing of merger for calculating Average Price | 5 days
Percentage of outstanding shares of acquiree's common stock to be converted into right to receive shares of acquirer's common stock upon merger | 90.00%
Percentage of outstanding shares of acquiree's common stock to be converted into right to receive shares of acquirer's common stock in event that shareholders perfecting dissenters' rights upon merger | 85.00%
Percentage of outstanding shares of acquiree's common stock that perfect shareholders' dissenters rights | 15.00%
Minimum [Member] |
Business Acquisition [Line Items] |
Merger agreement exchange ratio | 38.88%
Maximum [Member] |
Business Acquisition [Line Items] |
Merger agreement exchange ratio | 44.86%
Percentage of outstanding shares of acquiree's common stock that perfect shareholders' dissenters rights | 15.00%

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