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Summary of Significant Accounting Policies (Details) (USD $) | 12 Months Ended
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Dec. 31, 2013 Customer | Dec. 31, 2012 | Dec. 31, 2011
Summary of Significant Accounting Policies [Abstract] |  |  |  |  |
Equity ownership in entities included in consolidated financial statements, minimum (in hundredths) | 50.00% |  |  |  |
Inventory reserve | $ 42,700,000 |  | $ 41,900,000 |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |
Realized non recurring benefit related to deferred tax valuation allowance |  |  | 21,500,000 |  | 21,500,000
Valuation allowance | 6,694,000 | [1] | 7,174,000 | [1] |
Net deferred tax asset | 45,911,000 |  | 44,343,000 |  |
Reconciliation of the shares used in calculating basic and dilutive net earnings per common share [Abstract] |  |  |  |  |
Weighted average common shares outstanding - Basic (in shares) | 22,974,690 |  | 22,812,077 |  | 22,794,606
Plus incremental shares from assumed conversions [Abstract] |  |  |  |  |
Dilutive effect of restricted stock and performance shares (in shares) | 287,000 |  | 231,000 |  | 197,000
Dilutive effect of stock options (in shares) | 8,000 |  | 7,000 |  | 2,000
Dilutive effect of convertible debentures (in shares) | 0 |  | 0 |  | 234,000
Weighted average common shares outstanding - Diluted (in shares) | 23,270,067 |  | 23,050,340 |  | 23,228,345
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Minimum product warranty period | 90 days |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Number of largest individual customers | 5 |  |  |  |
Concentration risk, percentage (in hundredths) | 66.00% |  | 64.00% |  | 62.00%
Foreign cash balance | $ 4,700,000 |  | $ 12,900,000 |  |
NAPA Auto Parts [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk, percentage (in hundredths) | 19.00% |  |  |  |
Benchmark percentage to consider customer as major customer (in hundredths) | 19.00% |  |  |  |
Advance Auto Parts, Inc. [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk, percentage (in hundredths) | 15.00% |  |  |  |
Benchmark percentage to consider customer as major customer (in hundredths) | 15.00% |  |  |  |
O' Reilly Automotive, Inc. [Member] |  |  |  |  |
Concentration Risk [Line Items] |  |  |  |  |
Concentration risk, percentage (in hundredths) | 18.00% |  |  |  |
Benchmark percentage to consider customer as major customer (in hundredths) | 18.00% |  |  |  |
Stock Options [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 8,000 |  | 22,000 |  | 57,000
Restricted and performance shares [Member] |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] |  |  |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | 203,000 |  | 200,000 |  | 157,000
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 $35.6 million and $33.2 million for 2013 and 2012, respectively. Non-current net deferred tax assets are $10.3 million and $11.1 million for 2013 and 2012, respectively. The tax valuation allowance was allocated to long term deferred tax assets in the amounts of $6.7 million and $7.2 million in 2013 and 2012, respectively. None of the valuation allowance was allocated to current deferred tax assets in 2013 and 2012

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