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ACQUISITIONS Building (Details) - Building [Member] - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2015
Dec. 31, 2017
Business Acquisition [Line Items]    
Intangible Asset Useful life (in years)   2 years
Payments to Acquire Businesses, Gross $ 10.4  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Land 3.5  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings 6.3  
Intangible assets 0.7  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities $ 0.1  
Property and Equipment, Useful Life   30 years