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EARNINGS PER SHARE (Detail Textuals) - Stock options - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Antidilutive securities      
Securities not included in the computation of diluted earnings per share (in shares) 0    
Outstanding amount of securities not included in computation of diluted earnings per share   $ 0 $ 0