Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments, Fair Value, Hedging Activities, and Concentrations of Credit Risk - Summary of Certain Amounts Related to Hedging Activities (Detail)

v3.19.2
Financial Instruments, Fair Value, Hedging Activities, and Concentrations of Credit Risk - Summary of Certain Amounts Related to Hedging Activities (Detail) - Cash Flow Hedges [Member]
$ in Thousands
6 Months Ended
Jun. 30, 2019
USD ($)
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]  
Amount of Gain (Loss) Recognized in AOCI $ (38)
Commodity Contracts [Member]  
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]  
Amount of Gain (Loss) Recognized in AOCI $ (38)