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Significant Accounting Policies - Additional Information (Detail)
 12 Months Ended
Dec. 31, 2015
USD ($)
Segment
shares
Dec. 31, 2014
USD ($)
shares
Dec. 31, 2013
USD ($)
shares
Significant Accounting Policies [Line Items]      
Number of operating segments | Segment 1    
Goodwill impairment losses $ 0 $ 0 $ 0
Provision for estimated sales returns, stock rotations, and other customer rights 14,130,000 14,618,000  
Severance expenses $ 7,140,000 6,726,000 5,987,000
Maximum percentage of annual compensation contributed by employees towards employee benefit plan 50.00%    
Maximum amount contributed by employees toward employee benefit plan $ 18,000    
Additional amount contributed by employees aged 50 and over towards employee benefit plan $ 6,000    
Percentage of employee contributions contributed by employer towards employee benefit plan 50.00%    
Maximum percentage of employee's eligible compensation 3.00%    
Contributions by employer $ 1,397,000 1,148,000 1,073,000
Minimum percentage of tax benefit realized upon settlement 50.00%    
Advertising expenses $ 2,311,000 2,837,000 4,260,000
Allowance for doubtful accounts 2,101,000 3,928,000  
Bad debt expense (1,834,000) (1,932,000) (1,090,000)
Write off of bad debts $ 123,000 $ 1,537,000 $ 668,000
Anti-dilutive shares excluded from computation of earnings per share amount | shares 1,594,082 1,746,613 5,694,945
Deferred tax assets, current   $ 34,175,000  
Foreign Exchange Forward Contracts | Not Designated as Hedging Instrument      
Significant Accounting Policies [Line Items]      
Derivative, notional amount $ 319,380,000 250,946,000  
Gains (losses) from derivatives not designated as hedge (52,000) (88,000)  
Foreign Exchange Forward Contracts | Designated as Hedging Instrument | Cash Flow Hedging      
Significant Accounting Policies [Line Items]      
Derivative, notional amount 25,732,000 38,784,000  
Other comprehensive income, gain (loss) on outstanding forward contracts 8,000 (2,854,000)  
Foreign Exchange Forward Contracts | Financial Income | Not Designated as Hedging Instrument      
Significant Accounting Policies [Line Items]      
Derivative, net gain (loss) 378,000 (21,970,000) $ 20,306,000
Foreign Exchange Forward Contracts | Operating Expenses | Designated as Hedging Instrument | Cash Flow Hedging      
Significant Accounting Policies [Line Items]      
Derivative, net gain (loss) $ (1,585,000) $ (3,009,000) $ 2,366,000
Minimum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets 5 years    
Maximum      
Significant Accounting Policies [Line Items]      
Estimated useful lives of intangible assets 20 years