Summary of Significant Accounting Policies (Details) (USD $)	12 Months Ended
	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