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Related Party Transactions - Schedule of Related Party Transactions (Detail) - Affiliated Entity [Member] - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Related Party Transaction [Line Items]        
Sales $ 3,261 $ 3,209 $ 5,922 $ 6,102
Purchases 470 472 858 835
Rent $ 257 $ 291 $ 517 $ 572