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Stock-based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Restricted Stock Activity | Changes in restricted shares outstanding for the year ended December 31, 2017 were as follows:
|  |  |  |  | Weighted Average
|  |  |  |  | Grant Date
|  | Shares |  | Fair Value
Balance at December 31, 2016 |  | 81,269 |  |  | $ | 46.39
Granted |  | 26,064 |  |  | $ | 59.46
Vested |  | (29,167 | ) |  | $ | 47.58
Forfeited |  | — |  |  |  | —
Balance at December 31, 2017 |  | 78,166 |  |  | $ | 50.30
Schedule of SARs Activity | Changes in SARs outstanding for the year ended December 31, 2017 were as follows:
|  | SARs |  | Weighted Average Exercise Price
Balance at December 31, 2016 |  | 261,206 |  |  | $ | 34.75
Exercised |  | (26,970 | ) |  |  | 33.09
Forfeited |  | — |  |  |  | —
Balance at December 31, 2017 |  | 234,236 |  |  |  | 34.97
Exercisable at December 31, 2017 |  | 234,236 |  |  | $ | 34.97

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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for stock options and stock appreciation rights that were outstanding at the beginning and end of the year, exercisable at the end of the year, and the number of stock options and stock appreciation rights that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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