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INCOME TAXES (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Differences between effective tax rates and the federal statutory rate applied to income before income taxes        
Effective tax rate (as a percent) 24.10% 22.90% 22.00% 20.70%