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Stock Based Compensation (Details 1) - Employee Stock Option [Member] - $ / shares | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares - Nonvested, Beginning Balance (in shares) | 28,465 | 19,725
Shares - Granted (in shares) | 4,575 | 8,740
Shares - Vested (in shares) | (1,625) | 0
Shares - Forfeited (in shares) | (725) | 0
Shares - Nonvested, Ending Balance (in shares) | 30,690 | 28,465
Weighted Average Exercise Price - Nonvested, Beginning Balance (in dollars per share) | $ 26.67 | $ 25.15
Weighted Average Exercise Price - Granted (in dollars per share) | 39.00 | 30.1
Weighted Average Exercise Price - Vested (in dollars per share) | 25.81 | 0
Weighted Average Exercise Price - Forfeited (in dollars per share) | 28.62 | 0
Weighted Average Exercise Price - Nonvested, Ending Balance (in dollars per share) | $ 28.51 | $ 26.67

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- Definition Weighted average exercise price of non-vested options. + References No definition available. + Details
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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 non-vested options forfeited. + 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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