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PLANT, PROPERTY AND EQUIPMENT, NET - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Property, Plant and Equipment [Abstract]        
Depreciation expense $ 21.0 $ 19.2 $ 41.7 $ 37.5