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Intangible Assets, Net - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Finite Lived Intangible Assets Net [Abstract]        
Cost of sales - amortization of intangible assets $ 2,300 $ 3,800 $ 6,894 $ 8,538