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INCOME TAXES - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2017
Income Tax Contingency [Line Items]      
Reported tax rate (34.80%) 10.50%  
Excess tax benefit, share-based compensation $ 0.9    
Income tax benefit from release of uncertain tax positions   $ 0.3  
Scenario, Forecast      
Income Tax Contingency [Line Items]      
Reported tax rate     11.10%