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Property, Plant and Equipment, Net - Narrative (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Property, Plant and Equipment [Abstract]        
Depreciation expenses $ 5,328 $ 6,610 $ 15,856 $ 18,648