Annual report pursuant to Section 13 and 15(d)

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

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Financial Instruments, Fair Value, and Concentrations of Credit Risk - Summary of Certain Amounts Related to Hedging Activities (Detail) - Cash Flow Hedges [Member]
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]  
Amount of Gain (Loss) Recognized in AOCI $ 17
Amount of Gain (Loss) Reclassified to Earnings (81)
Commodity Contracts [Member]  
Fair Value Concentration Of Risk Financial Statement Captions [Line Items]  
Amount of Gain (Loss) Recognized in AOCI 17
Amount of Gain (Loss) Reclassified to Earnings $ (81)