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STOCK COMPENSATION PLANS (Tables) | 12 Months Ended
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Dec. 31, 2017
STOCK COMPENSATION PLANS [Abstract] |
Changes in Share of Class A Stock in Under Option | The following summary reflects changes in the shares of Class A Stock under option:
|  | 2017 Shares |  |  | 2017 Weighted Average Exercise Price |  |  | 2016 Shares |  |  | 2016 Weighted Average Exercise Price |  |  | 2015 Shares |  |  | 2015 Weighted Average Exercise Price |
Plan options |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at beginning of year |  |  | 231,755 |  |  | $ | 19.32 |  |  |  | 270,000 |  |  | $ | 19.34 |  |  |  | 376,250 |  |  | $ | 19.52 |
Granted |  |  | — |  |  |  | — |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercised |  |  | (54,953 | ) |  |  | 17.42 |  |  |  | (38,245 | ) |  |  | 19.50 |  |  |  | (106,250 | ) |  |  | 19.97 |
Expired |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Outstanding at end of year |  |  | 176,802 |  |  | $ | 19.91 |  |  |  | 231,755 |  |  | $ | 19.32 |  |  |  | 270,000 |  |  | $ | 19.34 |
Options exercisable at year end |  |  | 176,802 |  |  | $ | 19.91 |  |  |  | 231,755 |  |  | $ | 19.32 |  |  |  | 270,000 |  |  | $ | 19.34 |
Employee and Director Stock Options | The following tables summarize information about employee and director stock options outstanding at December 31, 2017:
Options Outstanding |  |  |  |  |  |
Range of Exercise Price |  |  | Shares Outstanding at December 31, 2017 |  | Weighted Average Remaining Life | Weighted Average Exercise Price |  | Aggregate Intrinsic Value |
| $ | 15.26 - $18.61 |  |  |  | 41,802 |  | 1.99 Years |  | $ | 17.52 |  |  | $ | 879,409 |
| $ | 18.62 - $22.66 |  |  |  | 135,000 |  | 4.86 Years |  | $ | 20.64 |  |  | $ | 2,418,187 |
Options Exercisable |  |  |  |  |  |  |  |  |  |  |  |  |  |
Range of Exercise Price |  |  | Shares Exercisable at December 31, 2017 |  | Weighted Average Remaining Life | Weighted Average Exercise Price |  | Aggregate Intrinsic Value |
| $ | 15.26 - $18.61 |  |  |  | 41,802 |  | 1.99 Years |  | $ | 17.52 |  |  | $ | 879,409 |
| $ | 18.62 - $22.66 |  |  |  | 135,000 |  | 4.86 Years |  | $ | 20.64 |  |  | $ | 2,418,187 |
Changes in Shares of Class A Stock in Restricted Stock Awards (RSA) | The following summary reflects changes in the shares of Class A Stock Restricted Stock Awards (RSA):
|  | 2017 Shares |  |  | 2017 Weighted Average Grant Date Fair Value |  |  | 2016 Shares |  |  | 2016 Weighted Average Grant Date Fair Value |  |  | 2015 Shares |  |  | 2015 Weighted Average Exercise Price |
Plan RSA's |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Outstanding at beginning of year |  |  | 5,000 |  |  | $ | 27.70 |  |  |  | - |  |  | $ | - |  |  |  | - |  |  | $ | - |
Granted |  |  | 11,568 |  |  |  | 38.08 |  |  |  | 5,000 |  |  |  | 27.70 |  |  |  | 5,000 |  |  |  | 27.38 |
Vested/Released |  |  | (11,568 | ) |  |  | 33.58 |  |  |  | - |  |  |  | - |  |  |  | (5,000 | ) |  |  | 27.38 |
Cancelled |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Unvested Outstanding at end of year |  |  | 5,000 |  |  | $ | 38.10 |  |  |  | 5,000 |  |  | $ | 27.70 |  |  |  | - |  |  | $ | - |

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