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Summary of Significant Accounting Policies (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Summary of Significant Accounting Policies [Abstract]      
Equity ownership in entities included in consolidated financial statements, minimum (in hundredths) 50.00%    
Inventory reserve $ 41,900,000 $ 39,500,000  
Property, Plant and Equipment [Line Items]      
Realized non recurring benefit related to deferred tax valuation allowance   21,500,000  
Valuation allowance 7,174,000 [1] 7,843,000 [1]  
Net deferred tax asset 44,343,000 49,136,000  
Reconciliation of the shares used in calculating basic and dilutive net earnings per common share [Abstract]      
Weighted average common shares outstanding - Basic (in shares) 22,812,077 22,794,606 22,556,858
Plus incremental shares from assumed conversions [Abstract]      
Dilutive effect of restricted stock and performance shares (in shares) 231,000 197,000 77,000
Dilutive effect of stock options (in shares) 7,000 2,000 0
Dilutive effect of convertible debentures (in shares) 0 234,000 0
Weighted average common shares outstanding - Diluted (in shares) 23,050,340 23,228,345 22,634,062
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Interest rate on debenture (in hundredths) 15.00%    
Concentration Risk [Line Items]      
Number of largest individual customers 5    
Concentration risk, percentage (in hundredths) 64.00% 62.00% 60.00%
Foreign cash balance $ 12,900,000 $ 8,600,000  
NAPA Auto Parts [Member]
      
Concentration Risk [Line Items]      
Benchmark percentage to consider customer as major customer (in hundredths) 18.00%    
Advance Auto Parts, Inc. [Member]
      
Concentration Risk [Line Items]      
Benchmark percentage to consider customer as major customer (in hundredths) 15.00%    
O' Reilly Automotive, Inc. [Member]
      
Concentration Risk [Line Items]      
Benchmark percentage to consider customer as major customer (in hundredths) 19.00%    
Stock Options and Restricted Shares [Member]
      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive securities excluded from computation of earnings per share (in shares) 222,000 214,000 449,000
15% Convertible Debentures [Member]
      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive securities excluded from computation of earnings per share (in shares) 0 0 820,000
Buildings [Member] | Minimum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 25 years    
Buildings [Member] | Maximum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 33 years 6 months    
Building Improvements [Member] | Minimum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 10 years    
Building Improvements [Member] | Maximum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 25 years    
Machinery and Equipment [Member] | Minimum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 7 years    
Machinery and Equipment [Member] | Maximum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 12 years    
Tools, Dies and Auxiliary Equipment [Member] | Minimum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 3 years    
Tools, Dies and Auxiliary Equipment [Member] | Maximum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 8 years    
Furniture and Fixtures [Member] | Minimum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 3 years    
Furniture and Fixtures [Member] | Maximum [Member]
      
Property, Plant and Equipment [Line Items]      
Estimated useful life 12 years    
[1] Current net deferred tax assets are $33.2 million and $32.2 million for 2012 and 2011, respectively. Non-current net deferred tax assets are $11.1 million and $16.9 million for 2012 and 2011, respectively. The tax valuation allowance was allocated to long term deferred tax assets in the amounts of $7.2 million and $7.8 million in 2012 and 2011, respectively. None of the valuation allowance was allocated to current deferred tax assets in 2012 and 2011.