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Related Party Transactions - Schedule of Related Party Transactions (Detail) - Affiliated Entity [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Related Party Transaction [Line Items]      
Sales $ 12,636 $ 10,250 $ 7,914
Purchases 1,587 1,294 579
Rent $ 1,099 $ 1,154 $ 635