Income Taxes	9 Months Ended
Oct. 02, 2015
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The Company determines its estimated annual effective tax rate at the end of each interim period based on full-year forecasted pre-tax income and facts known at that time. The estimated annual effective tax rate is applied to the year-to-date pre-tax income at the end of each interim period. The tax effect of significant unusual items is reflected in the period in which they occur. Since the Company is incorporated in Canada, it is required to use Canada’s statutory tax rate of 27.0% in the determination of the estimated annual effective tax rate. The Company’s effective tax rate on income from continuing operations of 27.2% and 26.3%, respectively, for the three and nine month periods ended October 2, 2015 differ from the Canadian statutory rate of 27.0% primarily due to the gain from JK Lasers divestiture, the audit settlement with the U.S. Internal Revenue Service (the “IRS”), mix of income earned in jurisdictions with varying tax rates, losses in jurisdictions with a full valuation allowance, and the impact of discrete items for the periods. The Company’s effective tax rate on income from continuing operations of 28.2% and 30.6%, respectively, for the three and nine month periods ended September 26, 2014 differ from the Canadian statutory rate of 27.0% primarily due to the mix of income earned in jurisdictions with varying tax rates, losses in jurisdictions with a valuation allowance which are not benefitted in the income tax provision during the periods, and the impact of discrete items for the periods. The Company maintains a valuation allowance on some of its deferred tax assets in certain jurisdictions. A valuation allowance is required when, based upon an assessment of various factors, including recent operating loss history, anticipated future earnings, and prudent and reasonable tax planning strategies, it is more likely than not that some portion of the deferred tax assets will not be realized. In conjunction with the Company’s ongoing review of its actual results and anticipated future earnings, the Company continuously reassesses the possibility of releasing the remaining valuation allowance currently in place on its deferred tax assets. A release would be reported as a reduction to income tax expense without any impact on cash flows in the quarter in which it is released.

11. Income Taxes

The Company determines its estimated annual effective tax rate at the end of each interim period based on full-year forecasted pre-tax income and facts known at that time. The estimated annual effective tax rate is applied to the year-to-date pre-tax income at the end of each interim period. The tax effect of significant unusual items is reflected in the period in which they occur. Since the Company is incorporated in Canada, it is required to use Canada’s statutory tax rate of 27.0% in the determination of the estimated annual effective tax rate.

The Company’s effective tax rate on income from continuing operations of 27.2% and 26.3%, respectively, for the three and nine month periods ended October 2, 2015 differ from the Canadian statutory rate of 27.0% primarily due to the gain from JK Lasers divestiture, the audit settlement with the U.S. Internal Revenue Service (the “IRS”), mix of income earned in jurisdictions with varying tax rates, losses in jurisdictions with a full valuation allowance, and the impact of discrete items for the periods. The Company’s effective tax rate on income from continuing operations of 28.2% and 30.6%, respectively, for the three and nine month periods ended September 26, 2014 differ from the Canadian statutory rate of 27.0% primarily due to the mix of income earned in jurisdictions with varying tax rates, losses in jurisdictions with a valuation allowance which are not benefitted in the income tax provision during the periods, and the impact of discrete items for the periods.

The Company maintains a valuation allowance on some of its deferred tax assets in certain jurisdictions. A valuation allowance is required when, based upon an assessment of various factors, including recent operating loss history, anticipated future earnings, and prudent and reasonable tax planning strategies, it is more likely than not that some portion of the deferred tax assets will not be realized.

In conjunction with the Company’s ongoing review of its actual results and anticipated future earnings, the Company continuously reassesses the possibility of releasing the remaining valuation allowance currently in place on its deferred tax assets. A release would be reported as a reduction to income tax expense without any impact on cash flows in the quarter in which it is released.