Income Taxes	9 Months Ended
Income Taxes	Sep. 26, 2020
Income Tax Disclosure [Abstract]
Income taxes [Text Block]	Income Taxes Our income tax provision for interim periods is determined using an estimate of our annual effective tax rate adjusted for discrete items, if any, that are taken into account in the relevant period. Each quarter we update our estimate of the annual effective tax rate and, if our estimated annual tax rate changes, we make a cumulative adjustment. The estimated annual effective tax rate for the nine months ended September 26, 2020 was 27.7%. Our annual effective tax rate for the nine months ended September 28, 2019 was estimated at 24.0%. Our actual effective tax rate was 27.8% and 29.2% for the three months ended September 26, 2020 and September 28, 2019, respectively. Our effective tax rate was 27.8% and 24.0% for the nine months ended September 26, 2020 and September 28, 2019, respectively. The change in the effective tax rate from statutory tax rates is primarily due to the impact of state and local taxes which are partially offset by favorable discrete items. On March 27, 2020, Congress approved and the President signed the Coronavirus Aid, Relief, and Economic Security ("CARES") Act into law. The CARES Act is a tax-and-spending package intended to provide economic relief to address the impact of the COVID-19 pandemic. The Company is currently evaluating several significant business tax provisions, such as net operating losses and employee retention credits to determine the impact on the Company. As of September 26, 2020, we had unrecognized tax benefits of $1,639, of which $713 would affect our effective rate if recognized, and accrued interest expense related to unrecognized benefits of $69. At December 31, 2019, we had unrecognized tax benefits of $1,850, of which $654 would affect our effective rate if recognized, and accrued interest expense related to unrecognized benefits of $64. Unrecognized tax benefits are the differences between a tax position taken, or expected to be taken in a tax return, and the benefit recognized for financial reporting purposes. We recognize interest accrued related to unrecognized tax benefits in income tax expense. Penalties, if incurred, would be recognized as a component of income tax expense. The Company is routinely under audit by U.S. federal, state, local and Canadian authorities in the area of income tax. These audits include questioning the timing and the amount of income and deductions and the allocation of income and deductions among various tax jurisdictions. With the exception of U.S. state jurisdictions and Canada, the Company is no longer subject to examination by tax authorities for the years through 2016. As of September 26, 2020, we believe it is reasonably possible that the total amount of unrecognized tax benefits will not significantly increase or decrease.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.