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Derivatives and Hedging - Additional Information (Detail) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Derivative [Line Items]          
Maximum maturity for foreign currency derivatives     12 months    
Gain (Loss) on Cash Flow Hedge Ineffectiveness, Net     $ 0    
Forward points expensed on derivatives $ 158,000   219,000    
Net losses from accumulated other comprehensive income (loss) into net earnings during the next 12 months 319,000   319,000    
Effect of Cash Flow Hedges on Results of Operations [Abstract]          
Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion)     138,000    
Foreign currency losses (1,873,000) $ 24,000 (2,508,000) $ 699,000  
Foreign Exchange Forward | Cost Of Goods Sold          
Derivative [Line Items]          
Gain Reclassified from AOCI into COGS 155,000 414,000 200,000 1,316,000  
Designated as Hedging Instrument | Foreign Exchange Contract          
Derivative [Line Items]          
Notional amounts of derivatives 28,957,000   28,957,000   $ 14,210,000
Not Designated as Hedging Instrument | Foreign Exchange Contract          
Derivative [Line Items]          
Notional amounts of derivatives 82,712,000   82,712,000   $ 4,821,000
Cash Flow Hedging | Designated as Hedging Instrument | Foreign Exchange Forward          
Effect of Cash Flow Hedges on Results of Operations [Abstract]          
Gain (Loss) Recognized in Other Comprehensive Income (Effective Portion) 1,739,000 (48,000) 138,000 (2,302,000)  
Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Earnings (Effective Portion) $ (155,000) $ 414,000 $ (200,000) $ 1,316,000  
Minimum          
Derivative [Line Items]          
Maximum maturity for foreign currency cash flow hedge     12 months    
Maximum          
Derivative [Line Items]          
Maximum maturity for foreign currency cash flow hedge     15 months