| 
           Income Taxes (Tables)
  
         | 
        12 Months Ended | 
      
      
        | 
           Dec. 31, 2012 
         | 
      
      
        | Income Taxes [Abstract] | 
         
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        | Income Tax Expense By Jurisdiction | 
        
 
		
			
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						Year Ended December 31 
				 | 
			 
			
				| 
					 
						  
				 | 
				
					 
						  
				 | 
				
					 
						2012 
				 | 
				
					 
						  
				 | 
				
					 
						2011 
				 | 
				
					 
						  
				 | 
				
					 
						2010 
				 | 
			 
			
				| 
					 
						Currently payable income taxes: 
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						Federal 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
1,669,000 
				 | 
				
					 
						  
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						$ 
				 | 
				
5,609,000 
				 | 
				
					 
						  
				 | 
				
					 
						$ 
				 | 
				
5,906,000 
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				| 
					 
						State 
				 | 
				
					 
						  
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141,000 
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414,000 
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581,000 
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						Foreign 
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(18,000)
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103,000 
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(50,000)
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				| 
					 
						  
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				 | 
				
					 
						  
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1,792,000 
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6,126,000 
				 | 
				
					 
						  
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						$ 
				 | 
				
6,437,000 
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						Deferred income taxes (benefit): 
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						Federal 
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				 | 
				
					 
						$ 
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(542,000)
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						$ 
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1,204,000 
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						$ 
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(522,000)
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				| 
					 
						State 
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(33,000)
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72,000 
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(10,000)
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						Foreign 
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(57,000)
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420,000 
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14,000 
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(632,000)
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1,696,000 
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(518,000)
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						$ 
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1,160,000 
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						$ 
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7,822,000 
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						$ 
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5,919,000 
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        | Reconciliation Of Effective Tax Rate, By Percentage | 
        
 
		
			
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						Year Ended December 31 
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				| 
					 
						  
				 | 
				
					 
						  
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						2012 
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				 | 
				
					 
						2011 
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				 | 
				
					 
						2010 
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				| 
					 
						Tax at U.S. statutory rate 
				 | 
				
					 
						  
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35.0% 
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35.0% 
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35.0% 
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				| 
					 
						Surtax exemption 
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(1.5)
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(0.3)
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(0.6)
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				| 
					 
						State income taxes, net of federal benefit 
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1.7 
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1.9 
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2.4 
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						Foreign income taxes, net of  
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						  foreign tax credits 
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(0.2)
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4.7 
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2.7 
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						Impairment of goodwill 
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						  - 
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2.5 
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						  - 
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						Other  
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(0.9)
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0.6 
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(1.6)
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						Effective tax rate 
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34.1% 
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44.4% 
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37.9% 
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        | Schedule Of Deferred Tax Assets And Liabilities | 
        
 
		
			
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						2012 
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						2011 
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						Deferred tax assets: 
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						Allowance for doubtful accounts 
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						$ 
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25,000 
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						$ 
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58,000 
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				| 
					 
						Inventory 
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3,393,000 
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2,611,000 
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				| 
					 
						Accrued and prepaid expenses 
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530,000 
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762,000 
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				| 
					 
						Domestic net operating loss carry-forward 
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106,000 
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186,000 
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						Long-term compensation plans 
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330,000 
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298,000 
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						Nonemployee director stock compensation 
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200,000 
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128,000 
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						Other stock compensation 
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176,000 
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122,000 
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						State income taxes 
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69,000 
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63,000 
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						Foreign net operating loss carry-forwards and credits 
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2,092,000 
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2,625,000 
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						Gross deferred tax assets 
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6,921,000 
				 | 
				
					 
						  
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6,853,000 
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						Valuation allowance 
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(2,091,000)
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(2,624,000)
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						Net deferred tax assets  
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4,830,000 
				 | 
				
					 
						  
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4,229,000 
				 | 
			 
			
				| 
					 
						  
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						Deferred tax liabilities 
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						Depreciation 
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(1,439,000)
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(1,577,000)
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						Intangible assets 
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(759,000)
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(674,000)
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				| 
					 
						Gross deferred tax liability 
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				 | 
				
(2,198,000)
				 | 
				
					 
						  
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(2,251,000)
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				| 
					 
						Total net deferred tax asset 
				 | 
				
					 
						$ 
				 | 
				
2,632,000 
				 | 
				
					 
						  
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						$ 
				 | 
				
1,978,000 
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        | Schedule Of Unrecognized Tax Benefits | 
        
 
		
			
				| 
					 
						  
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						2012 
				 | 
				
					 
						  
				 | 
				
					 
						2011 
				 | 
				
					 
						  
				 | 
				
					 
						2010 
				 | 
			 
			
				| 
					 
						Unrecognized tax benefits – January 1 
				 | 
				
					 
						$ 
				 | 
				
234,000 
				 | 
				
					 
						$ 
				 | 
				
270,000 
				 | 
				
					 
						$ 
				 | 
				
349,000 
				 | 
			 
			
				| 
					 
						Gross increases - tax positions in prior period  
				 | 
				
					 
						  
				 | 
				
0 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
			 
			
				| 
					 
						Gross decreases - tax positions in prior period 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
			 
			
				| 
					 
						Gross increases - current period tax positions 
				 | 
				
					 
						  
				 | 
				
0 
				 | 
				
					 
						  
				 | 
				
7,000 
				 | 
				
					 
						  
				 | 
				
7,000 
				 | 
			 
			
				| 
					 
						Expiration of statute of limitations 
				 | 
				
					 
						  
				 | 
				
(81,000)
				 | 
				
					 
						  
				 | 
				
(43,000)
				 | 
				
					 
						  
				 | 
				
(86,000)
				 | 
			 
			
				| 
					 
						Unrecognized tax benefits – December 31, 2012 
				 | 
				
					 
						$ 
				 | 
				
153,000 
				 | 
				
					 
						$ 
				 | 
				
234,000 
				 | 
				
					 
						$ 
				 | 
				
270,000 
				 | 
			 
		  
		
			 
		 
		  
	   
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