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STOCK-BASED COMPENSATION (Detail Textuals 2) - Restricted Stock - USD ($)
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost related to non-vested restricted shares $ 8,118,000  
Unrecognized compensation cost related to non-vested restricted shares recognized period 3 years 8 months 12 days  
Tax benefits for compensation tax deductions in excess of compensation expense $ 583,000 $ 650,000