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LONG TERM INCENTIVE PLANS - Amount of cumulatively granted restricted stock awards under 2011 and 2017 Long-Term Incentive Plans (Details) - Restricted stock awards cumulatively granted under 2011 and 2017 Long-Term Incentive Plans
12 Months Ended
Dec. 31, 2017
$ / shares
shares
Restricted stock awards, beginning of year | shares 19,750
Beginning of year, weighted average grant price | $ / shares $ 28.97
Granted | shares 13,824
Granted, weighted average grant price | $ / shares $ 39.57
Vested | shares (5,650)
Vested, weighted average grant price | $ / shares $ 27.62
Forfeited | shares (900)
Forfeited, weighted average grant price | $ / shares $ 30.56
Restricted stock awards, end of year | shares 27,024
End of year, weighted average grant price | $ / shares $ 34.62