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FAIR VALUE MEASUREMENTS (Details Textuals) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Fair Value Disclosures [Abstract]        
Fair Value, Assets, Level 1 to Level 2 Transfers   $ 0.0    
Fair Value, Assets, Level 2 to Level 1 Transfers   0.0    
Fair Value, Assets, Level 3 Transfers In $ 0.0      
Fair Value, Assets, Level 3 Transfers Out 0.0      
Fair Value, Liabilities, Level 1 to Level 2 Transfers   0.0    
Fair Value, Liabilities, Level 2 to Level 1 Transfers   0.0    
Fair Value, Liabilities, Level 3 Transfers In 0.0      
Fair Value, Liabilities, Level 3 Transfers Out $ 0.0      
Non-recurring Fair Value, Assets   $ 0.0 $ 0.0 $ 0.0