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DEFERRED TAX ASSETS AND LIABILITIES (Details) - USD ($)
$ in Millions
Sep. 30, 2015
Dec. 31, 2014
Dec. 31, 2013
DEFERRED TAX ASSETS AND LIABILITIES [Abstract]      
Net deferred tax assets $ 27.1   $ 40.0
Undistributed foreign earnings indefinitely reinvested 50.0 $ 50.0  
Additional undistributed foreign earnings expected to be indefinitely reinvested in 2015 20.0    
Incremental taxes on indefinitely reinvested foreign earnings $ 5.3