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Related Party Transactions - Schedule of Related Party Transactions (Detail) - Affiliated Entity [Member] - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Related Party Transaction [Line Items]        
Sales $ 3,736 $ 3,259 $ 9,658 $ 9,361
Purchases 469 372 1,327 1,207
Rent $ 256 $ 257 $ 773 $ 829