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Equity Based Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Equity Based Plans [Abstract] |
Cumulative Summary of Equity Plans | A cumulative summary of equity plans as of December 31, 2018 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 |  |  |  | 929,891 |  |  |  | - |  |  |  | 778,300 |  |  |  | - |  |  |  | 391,809 |
|  |  | 2,700,000 |  |  |  | 1,346,293 |  |  |  | - |  |  |  | 918,091 |  |  |  | - |  |  |  | 399,584 |
Restricted Stock Granted and Cancelled | During 2018, 2017 and 2016, 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 |
2018 |  |  | 93,801 |  |  | $ | 78.63 |
2017 |  |  | 79,475 |  |  | $ | 62.19 |
2016 |  |  | 101,790 |  |  | $ | 51.59 |
During 2018, 2017 and 2016, the following shares were cancelled due to employee terminations prior to restrictions lapsing:
Year Cancelled |  | Number of Shares |  |  | Weighted Average Fair Value Per Share |
2018 |  |  | 3,867 |  |  | $ | 59.51 |
2017 |  |  | 2,875 |  |  | $ | 63.12 |
2016 |  |  | 4,965 |  |  | $ | 35.78 |

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