Income Taxes	3 Months Ended
Mar. 30, 2019
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 effective tax rate for the three months ended March 30, 2019 was 34.8%. Our effective tax rate for the three months ended March 31, 2018 was 23.4%. The change in rate is primarily due to the change in discrete items between the two quarters. As of March 30, 2019, we had unrecognized tax benefits of $1,318, of which $592 would affect our effective rate if recognized, and accrued interest expense related to unrecognized benefits of $36. At March 31, 2018, we had unrecognized tax benefits of $2,581, of which $1,948 would affect our effective rate if recognized, and accrued interest expense related to unrecognized benefits of $128. 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 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. The Company has been audited by the Internal Revenue Service through 2016. With the exception of U.S. state jurisdictions, the Company is no longer subject to examination by tax authorities for the years through 2016. As of March 30, 2019, we believe it is reasonably possible that the total amount of unrecognized tax benefits will not significantly increase or decrease.

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 effective tax rate for the three months ended March 30, 2019 was 34.8%. Our effective tax rate for the three months ended March 31, 2018 was 23.4%. The change in rate is primarily due to the change in discrete items between the two quarters.

As of March 30, 2019, we had unrecognized tax benefits of $1,318, of which $592 would affect our effective rate if recognized, and accrued interest expense related to unrecognized benefits of $36. At March 31, 2018, we had unrecognized tax benefits of $2,581, of which $1,948 would affect our effective rate if recognized, and accrued interest expense related to unrecognized benefits of $128. 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 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. The Company has been audited by the Internal Revenue Service through 2016. With the exception of U.S. state jurisdictions, the Company is no longer subject to examination by tax authorities for the years through 2016. As of March 30, 2019, we believe it is reasonably possible that the total amount of unrecognized tax benefits will not significantly increase or decrease.