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Equity Based Plans (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity Based Plans [Abstract] |
Summary of Cumulative Summary of Equity Plans | A cumulative summary of equity plans as of December 31, 2017 follows:
|  | Authorized |  |  | Restricted Stock Issued |  |  | Outstanding Stock Options |  |  | Stock Options Exercised |  |  | Stock Options Exercisable |  |  | Shares Available for Grant |
Equity Plans |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amended 1999 Plan |  |  | 600,000 |  |  |  | 416,402 |  |  |  | - |  |  |  | 139,791 |  |  |  | - |  |  |  | 7,775 |
Amended 2003 Plan |  |  | 2,100,000 |  |  |  | 839,957 |  |  |  | - |  |  |  | 778,300 |  |  |  | - |  |  |  | 481,743 |
|  |  | 2,700,000 |  |  |  | 1,256,359 |  |  |  | - |  |  |  | 918,091 |  |  |  | - |  |  |  | 489,518 |
Summary of Restricted Stock Granted and Cancelled | During 2017, 2016 and 2015, the Company granted the following shares of restricted stock to directors, officers and employees pursuant to its equity plans as follows:
Year Granted |  | Number of Shares |  |  | Weighted Average Fair Value Per Share |
2017 |  |  | 79,475 |  |  | $ | 62.19 |
2016 |  |  | 101,790 |  |  | $ | 51.59 |
2015 |  |  | 147,928 |  |  | $ | 41.66 |
During 2017, 2016 and 2015, the following shares were cancelled due to employee terminations prior to restrictions lapsing:
Year Cancelled |  | Number of Shares |  |  | Weighted Average Fair Value Per Share |
2017 |  |  | 2,875 |  |  | $ | 63.12 |
2016 |  |  | 4,965 |  |  | $ | 35.78 |
2015 |  |  | - |  |  |  | - |

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- Definition Tabular disclosure for share-based compensation plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -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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