Quarterly report pursuant to Section 13 or 15(d)

INCOME TAXES - Additional Information (Detail)

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INCOME TAXES - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Tax Disclosure [Abstract]        
Gross unrecognized tax benefit balance, change within the next twelve months, lower limit $ 0.0   $ 0.0  
Gross unrecognized tax benefit balance, change within the next twelve months, upper limit $ 4.7   $ 4.7  
Effective income tax rate 29.00% 37.20% 31.70% 36.10%
Discrete Income Tax Benefit $ 8.6      
Decrease in Effective Income Tax Rate, Percent 5.40%   2.90%