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SHARE-BASED PAYMENTS (Details 4) - Subsidiaries Compensation Plans [Member] - Restricted Stock [Member] - shares
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Number of other equity instruments outstanding [Roll Forward]    
Beginning balance 237,856 175,910
Granted 129,218 138,282
Exercised (41,801) (15,811)
Not acquired due to breach of employment retention conditions (15,563) (60,525)
Ending balance 309,710 237,856