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Derivative Financial Instruments - Additional Information (Detail) - Derivatives Not Designated as Hedging Instrument [Member] - Fair Value, Inputs, Level 2 [Member] - USD ($)
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Derivatives Fair Value [Line Items]      
Foreign currency forward contracts, notional amount $ 21,000,000   $ 20,000,000
Other Expense [Member]      
Derivatives Fair Value [Line Items]      
Foreign currency forward contracts, gain (loss) related to changes in fair value (1,000,000) $ 1,000,000  
Prepaid and Other Current Assets [Member] | Maximum [Member]      
Derivatives Fair Value [Line Items]      
Foreign currency forward contracts, assets 1,000,000   1,000,000
Other Current Liabilities [Member] | Maximum [Member]      
Derivatives Fair Value [Line Items]      
Foreign currency forward contracts, liability $ 1,000,000   $ 1,000,000