Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2013
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	During interim periods, we follow the accounting policies set forth in our Annual Report on Form 10-K for the fiscal year ended December 30, 2012 (the "2012 Annual Report on Form 10K") and apply appropriate interim financial reporting standards for a fair statement of our operating results and financial position in conformity with accounting principles generally accepted in the United States of America, as codified by the Financial Accounting Standards Board ("FASB") in the Accounting Standards Codification ("ASC") (referred to herein as "U.S. GAAP"), as indicated below. Users of financial information produced for interim periods in 2013 are encouraged to read this Quarterly Report on Form 10-Q in conjunction with our consolidated financial statements and notes thereto filed with the Securities and Exchange Commission ("SEC") in our 2012 Annual Report on Form 10-K. We use a 4-4-5 convention for our fiscal quarters, which are thirteen week periods generally ending on the last Sunday of each calendar quarter. We refer to these thirteen week fiscal periods as “quarters” throughout this report. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the SEC’s requirements for Form 10-Q and contain all adjustments, of a normal and recurring nature, which are necessary for a fair statement of (i) the condensed consolidated income statements for the twenty-six week periods ended June 30, 2013 and June 24, 2012, (ii) the condensed consolidated statements of comprehensive income for the twenty-six week periods ended June 30, 2013 and June 24, 2012, (iii) the condensed consolidated balance sheets at June 30, 2013 and December 30, 2012, (iv) the condensed consolidated statements of cash flows for the twenty-six week periods ended June 30, 2013 and June 24, 2012, and (v) the condensed consolidated statement of shareholders’ equity for the twenty-six week period ended June 30, 2013. However, the accompanying unaudited condensed consolidated financial statements do not include all information and notes required by U.S. GAAP. The condensed consolidated balance sheet as of December 30, 2012, included in this report, was derived from our 2012 audited financial statements, but does not include all disclosures required by U.S. GAAP.
Use of Estimates, Policy [Policy Text Block]	Interim financial reporting standards require us to make estimates that are based on assumptions regarding the outcome of future events and circumstances not known at that time, including the use of estimated effective tax rates. Inevitably, some assumptions will not materialize, unanticipated events or circumstances may occur which vary from those estimates and such variations may significantly affect our future results. Additionally, interim results may not be indicative of our results for future interim periods or our annual results.
Earnings Per Share, Policy [Policy Text Block]	In accordance with U.S. GAAP, basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per share includes the dilutive effect of outstanding stock options calculated using the treasury stock method. The computation of diluted earnings per share does not include stock option awards that were outstanding and anti-dilutive (i.e., including such awards would result in higher earnings per share), since the exercise prices of these awards exceeded the average market price of the company’s common stock during the respective periods.
Amortization Policy, Pre-production Costs [Policy Text Block]	We amortize the cost of the customer-owned tooling over the expected life of the wheel program on a straight line basis.
Revenue Recognition, Deferred Revenue [Policy Text Block]	Also, we defer any reimbursements made to us by our customers and recognize the tooling reimbursement revenue over the same period in which the tooling is in use.
Cash and Cash Equivalents, Policy [Policy Text Block]	The company's short-term investments include certificates of deposit and fixed deposits whose original maturity is greater than three months and is one year or less. Certificates of deposit and fixed deposits whose original maturity is three months or less are classified as cash equivalents and certificates of deposit and fixed deposits whose maturity is greater than one year at the balance sheet date are classified as non-current assets in our condensed consolidated balance sheet.
Income Tax, Policy [Policy Text Block]	We account for income taxes using the asset and liability method. The asset and liability method requires the recognition of deferred tax assets and liabilities for expected future tax consequences of temporary differences that currently exist between the tax basis and financial reporting basis of our assets and liabilities. We calculate current and deferred tax provisions based on estimates and assumptions that could differ from actual results reflected on the income tax returns filed during the following years. Adjustments based on filed returns are recorded when identified in the subsequent years. The effect on deferred taxes of a change in tax rates is recognized in income in the period that the tax rate change is enacted. In assessing the likelihood of realization of deferred tax assets, we consider whether it is more likely than not that some portion of the deferred tax assets will not be realized. A valuation allowance is provided for deferred income taxes when, in our judgment, based upon currently available information and other factors, it is more likely than not that all or a portion of such deferred income tax assets will not be realized. The determination of the need for a valuation allowance is based on an on-going evaluation of current information including, among other things, historical operating results, estimates of future earnings in different taxing jurisdictions and the expected timing of the reversals of temporary differences. We believe that the determination to record a valuation allowance to reduce a deferred income tax asset is a significant accounting estimate because it is based, among other things, on an estimate of future taxable income in the United States and certain other jurisdictions, which is susceptible to change and may or may not occur, and because the impact of adjusting a valuation allowance may be material.
Income Tax Uncertainties, Policy [Policy Text Block]	The company adopted the U.S. GAAP method of accounting for uncertain tax positions during 2007. The purpose of this method is to clarify accounting for uncertain tax positions recognized. The U.S. GAAP method of accounting for uncertain tax positions utilizes a two-step approach to evaluate tax positions. Step one, recognition, requires evaluation of the tax position to determine if based solely on technical merits it is more likely than not to be sustained upon examination. Step two, measurement, is addressed only if a position is more likely than not to be sustained. In step two, the tax benefit is measured as the largest amount of benefit, determined on a cumulative probability basis, which is more likely than not to be realized upon ultimate settlement with tax authorities. If a position does not meet the more likely than not threshold for recognition in step one, no benefit is recorded until the first subsequent period in which the more likely than not standard is met, the issue is resolved with the taxing authority, or the statute of limitations expires. Positions previously recognized are derecognized when we subsequently determine the position no longer is more likely than not to be sustained. Evaluation of tax positions, their technical merits, and measurements using cumulative probability are highly subjective management estimates. Actual results could differ materially from these estimates.

Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2013

Basis of Accounting, Policy [Policy Text Block]

During interim periods, we follow the accounting policies set forth in our Annual Report on Form 10-K for the fiscal year ended December 30, 2012 (the "2012 Annual Report on Form 10K") and apply appropriate interim financial reporting standards for a fair statement of our operating results and financial position in conformity with accounting principles generally accepted in the United States of America, as codified by the Financial Accounting Standards Board ("FASB") in the Accounting Standards Codification ("ASC") (referred to herein as "U.S. GAAP"), as indicated below. Users of financial information produced for interim periods in 2013 are encouraged to read this Quarterly Report on Form 10-Q in conjunction with our consolidated financial statements and notes thereto filed with the Securities and Exchange Commission ("SEC") in our 2012 Annual Report on Form 10-K.

We use a 4-4-5 convention for our fiscal quarters, which are thirteen week periods generally ending on the last Sunday of each calendar quarter. We refer to these thirteen week fiscal periods as “quarters” throughout this report. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the SEC’s requirements for Form 10-Q and contain all adjustments, of a normal and recurring nature, which are necessary for a fair statement of (i) the condensed consolidated income statements for the twenty-six week periods ended June 30, 2013 and June 24, 2012, (ii) the condensed consolidated statements of comprehensive income for the twenty-six week periods ended June 30, 2013 and June 24, 2012, (iii) the condensed consolidated balance sheets at June 30, 2013 and December 30, 2012, (iv) the condensed consolidated statements of cash flows for the twenty-six week periods ended June 30, 2013 and June 24, 2012, and (v) the condensed consolidated statement of shareholders’ equity for the twenty-six week period ended June 30, 2013. However, the accompanying unaudited condensed consolidated financial statements do not include all information and notes required by U.S. GAAP. The condensed consolidated balance sheet as of December 30, 2012, included in this report, was derived from our 2012 audited financial statements, but does not include all disclosures required by U.S. GAAP.

Use of Estimates, Policy [Policy Text Block]

Interim financial reporting standards require us to make estimates that are based on assumptions regarding the outcome of future events and circumstances not known at that time, including the use of estimated effective tax rates. Inevitably, some assumptions will not materialize, unanticipated events or circumstances may occur which vary from those estimates and such variations may significantly affect our future results. Additionally, interim results may not be indicative of our results for future interim periods or our annual results.

Earnings Per Share, Policy [Policy Text Block]

In accordance with U.S. GAAP, basic net income per share is computed by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per share includes the dilutive effect of outstanding stock options calculated using the treasury stock method.

The computation of diluted earnings per share does not include stock option awards that were outstanding and anti-dilutive (i.e., including such awards would result in higher earnings per share), since the exercise prices of these awards exceeded the average market price of the company’s common stock during the respective periods.

Amortization Policy, Pre-production Costs [Policy Text Block]

We amortize the cost of the customer-owned tooling over the expected life of the wheel program on a straight line basis.

Revenue Recognition, Deferred Revenue [Policy Text Block]

Also, we defer any reimbursements made to us by our customers and recognize the tooling reimbursement revenue over the same period in which the tooling is in use.

Cash and Cash Equivalents, Policy [Policy Text Block]

The company's short-term investments include certificates of deposit and fixed deposits whose original maturity is greater than three months and is one year or less. Certificates of deposit and fixed deposits whose original maturity is three months or less are classified as cash equivalents and certificates of deposit and fixed deposits whose maturity is greater than one year at the balance sheet date are classified as non-current assets in our condensed consolidated balance sheet.

Income Tax, Policy [Policy Text Block]

We account for income taxes using the asset and liability method. The asset and liability method requires the recognition of deferred tax assets and liabilities for expected future tax consequences of temporary differences that currently exist between the tax basis and financial reporting basis of our assets and liabilities. We calculate current and deferred tax provisions based on estimates and assumptions that could differ from actual results reflected on the income tax returns filed during the following years. Adjustments based on filed returns are recorded when identified in the subsequent years.

The effect on deferred taxes of a change in tax rates is recognized in income in the period that the tax rate change is enacted. In assessing the likelihood of realization of deferred tax assets, we consider whether it is more likely than not that some portion of the deferred tax assets will not be realized. A valuation allowance is provided for deferred income taxes when, in our judgment, based upon currently available information and other factors, it is more likely than not that all or a portion of such deferred income tax assets will not be realized. The determination of the need for a valuation allowance is based on an on-going evaluation of current information including, among other things, historical operating results, estimates of future earnings in different taxing jurisdictions and the expected timing of the reversals of temporary differences. We believe that the determination to record a valuation allowance to reduce a deferred income tax asset is a significant accounting estimate because it is based, among other things, on an estimate of future taxable income in the United States and certain other jurisdictions, which is susceptible to change and may or may not occur, and because the impact of adjusting a valuation allowance may be material.

Income Tax Uncertainties, Policy [Policy Text Block]

The company adopted the U.S. GAAP method of accounting for uncertain tax positions during 2007. The purpose of this method is to clarify accounting for uncertain tax positions recognized. The U.S. GAAP method of accounting for uncertain tax positions utilizes a two-step approach to evaluate tax positions. Step one, recognition, requires evaluation of the tax position to determine if based solely on technical merits it is more likely than not to be sustained upon examination. Step two, measurement, is addressed only if a position is more likely than not to be sustained. In step two, the tax benefit is measured as the largest amount of benefit, determined on a cumulative probability basis, which is more likely than not to be realized upon ultimate settlement with tax authorities. If a position does not meet the more likely than not threshold for recognition in step one, no benefit is recorded until the first subsequent period in which the more likely than not standard is met, the issue is resolved with the taxing authority, or the statute of limitations expires. Positions previously recognized are derecognized when we subsequently determine the position no longer is more likely than not to be sustained. Evaluation of tax positions, their technical merits, and measurements using cumulative probability are highly subjective management estimates. Actual results could differ materially from these estimates.

- Definition

Disclosure of accounting policy for cash and cash equivalents, including the policy for determining which items are treated as cash equivalents. Other information that may be disclosed includes (1) the nature of any restrictions on the entity's use of its cash and cash equivalents, (2) whether the entity's cash and cash equivalents are insured or expose the entity to credit risk, (3) the classification of any negative balance accounts (overdrafts), and (4) the carrying basis of cash equivalents (for example, at cost) and whether the carrying amount of cash equivalents approximates fair value.

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- Definition

Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements.

+ References+ Details

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

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- Definition

Disclosure of accounting policy for tax positions taken in the Company's tax return filed or to be filed for which it is more likely than not that the tax position will not be sustained upon examination by taxing authorities (i.e., uncertain tax positions) and other types of contingencies related to income taxes.

+ References+ Details

- Definition

Disclosure of accounting policy for the use of estimates in the preparation of financial statements in conformity with generally accepted accounting principles.

+ References+ Details