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Derivative Instruments and Hedging Activities - Additional Information (Detail)
3 Months Ended 9 Months Ended
Sep. 30, 2014
USD ($)
Sep. 30, 2013
USD ($)
Sep. 30, 2014
USD ($)
Sep. 30, 2013
USD ($)
Dec. 31, 2013
Not Designated As Hedging Instrument [Member]
USD ($)
Dec. 31, 2013
Not Designated As Hedging Instrument [Member]
CAD
Sep. 30, 2014
Designated As Hedging Instrument [Member]
USD ($)
Sep. 30, 2014
Designated As Hedging Instrument [Member]
CAD
Dec. 31, 2013
Designated As Hedging Instrument [Member]
USD ($)
Dec. 31, 2013
Designated As Hedging Instrument [Member]
CAD
Derivatives, Fair Value [Line Items]                    
Notional amount of derivative contracts         $ 100,000 100,000 $ 3,600,000 4,000,000 $ 3,800,000 4,100,000
Maturity period for Canadian forward contracts     12 months              
Gains (losses) from derivative contracts not designated as hedging instruments recognized in net sales 200,000 (100,000) 100,000 (100,000)            
Unrealized pretax gain on outstanding derivatives accumulated in other comprehensive loss expected to be reclassified to net sales within next 12 months $ 18,000   $ 18,000