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Intangibles, Net - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Intangible Assets, Net (Excluding Goodwill) [Abstract]      
Amortization expense $ 6.0 $ 7.6 $ 14.4