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Significant Accounting Policies - Additional Information (Detail) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Significant Accounting Policies [Line Items]      
Foreign currency gain/loss $ (258,000) $ (415,000) $ 28,000
Shipping and handling revenue 1,400,000 1,400,000 1,400,000
Freight-out expenses 9,000,000 8,500,000 7,500,000
Advertising expenses 757,000 775,000 702,000
Derivative fair value adjustment gain (loss), net of tax 241,000 (272,000)  
Restructuring expenses 367,000    
Interest Rate Swap Agreements
      
Schedule Of Significant Accounting Policies [Line Items]      
Commencement date 2013-03    
Expiry date Jun. 30, 2018    
Derivative fair value adjustment gain (loss), net of tax 241,000 (272,000)  
Interest Rate Swap Agreements | Cash Flow Hedging
      
Schedule Of Significant Accounting Policies [Line Items]      
Notional amount $ 29,800,000    
Wal Mart Stores Inc
      
Schedule Of Significant Accounting Policies [Line Items]      
Percentage of net sales 15.00% 16.00% 15.00%
Maximum
      
Schedule Of Significant Accounting Policies [Line Items]      
Highly liquid instruments which are considered cash and cash equivalent, maturity period 3 months    
Building and Improvement | Minimum
      
Schedule Of Significant Accounting Policies [Line Items]      
Property and equipment depreciated over estimated useful lives 30 years    
Machinery, Furniture and Equipment | Minimum
      
Schedule Of Significant Accounting Policies [Line Items]      
Property and equipment depreciated over estimated useful lives 3 years    
Machinery, Furniture and Equipment | Maximum
      
Schedule Of Significant Accounting Policies [Line Items]      
Property and equipment depreciated over estimated useful lives 10 years