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Stock Based Compensation (Details 1) - Employee Stock Option [Member] - $ / shares | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares - Nonvested (in shares) | 19,725 | 12,775
Shares - Granted (in shares) | 8,740 | 7,250
Shares - Vested (in shares) | 0 | (300)
Shares - Forfeited (in shares) | 0 | 0
Shares - Nonvested (in shares) | 28,465 | 19,725
Weighted Average Exercise Price - Nonvested (in dollars per share) | $ 25.15 | $ 23.63
Weighted Average Exercise Price - Granted (in dollars per share) | 30.10 | 27.50
Weighted Average Exercise Price - Vested (in dollars per share) | 0 | 16.75
Weighted Average Exercise Price - Forfeited (in dollars per share) | 0 | 0
Weighted Average Exercise Price - Nonvested (in dollars per share) | $ 26.67 | $ 25.15

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- Definition Weighted average exercise price of non-vested options forfeiture in period. + References No definition available. + Details
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- Definition Weighted average exercise price of non-vested options grant in period + References No definition available. + Details
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- Definition Weighted average exercise price of non-vested options vested in period + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
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- Definition Number of non-vested options outstanding. + References No definition available. + Details
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- Definition Number of options vested. + References No definition available. + Details
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- Details
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