Significant Accounting Policies (Policies)	9 Months Ended
Significant Accounting Policies (Policies)	Sep. 25, 2016
Accounting Policies [Abstract]
Derivatives, Methods of Accounting, Hedging Derivatives [Policy Text Block]	Our foreign currency transactions hedged with cash flow hedges as of September 25, 2016, are expected to occur within 1 month to 39 months. Derivative instruments designated as cash flow hedges must be de-designated as hedges when it is probable the forecasted hedged transaction will not occur in the initially identified time period or within a subsequent two-month time period. Deferred gains and losses in AOCI associated with such derivative instruments are reclassified immediately into other income and expense. Any subsequent changes in fair value of such derivative instruments are reflected in other income and expense unless they are re-designated as hedges of other transactions. We had no gains or losses recognized in other income and expense for foreign currency forward and option contracts not designated as hedging instruments during the thirty-nine week period ended September 25, 2016 or the year ended December 27, 2015. Deferred gains and losses associated with cash flow hedges of foreign currency costs are recognized as a component of cost of sales in the same period as the related cost is recognized. Derivative Financial Instruments We use derivatives to partially offset our business exposure to foreign currency risk. We may enter into forward contracts, option contracts, swaps, collars or other derivative instruments to offset some of the risk on expected future cash flows and on certain existing assets and liabilities. However, we may choose not to hedge certain exposures for a variety of reasons including, but not limited to, accounting considerations and the prohibitive economic cost of hedging particular exposures. There can be no assurance the hedges will offset more than a portion of the financial impact resulting from movements in foreign currency exchange rates. To help protect gross margins from fluctuations in foreign currency exchange rates, certain of our subsidiaries whose functional currency is the U.S. dollar hedge a portion of forecasted foreign currency costs. Generally, we may hedge portions of our forecasted foreign currency exposure associated with costs, typically for up to 39 months. We record all derivatives in the consolidated balance sheets at fair value. Our accounting treatment for these instruments is based on the hedge designation. The effective portions of cash flow hedges are recorded in Accumulated Other Comprehensive Income ("AOCI") until the hedged item is recognized in earnings. The ineffective portions of cash flow hedges are recorded in cost of sales.
Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges [Policy Text Block]	Derivatives that are not designated as hedging instruments are adjusted to fair value through earnings in the financial statement line item to which the derivative relates.
Fair Value Measurement, Policy [Policy Text Block]	Fair Value Measurements The company applies fair value accounting for all financial assets and liabilities and non-financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis, while other assets and liabilities are measured at fair value on a nonrecurring basis, such as when we have an asset impairment. Fair value is estimated by applying the following hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement: Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 2 – Observable inputs other than quoted prices in active markets for identical assets and liabilities, quoted prices for identical or similar assets or liabilities in inactive markets, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 – Inputs that are generally unobservable and typically reflect management’s estimate of assumptions that market participants would use in pricing the asset or liability.
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 27, 2015 (the "2015 Annual Report on Form 10-K") 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 2016 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 2015 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 quarterly reports on Form 10-Q and, in our opinion, contain all adjustments, of a normal and recurring nature, which are necessary for a fair statement of (i) the condensed consolidated statements of operations for the thirteen and thirty-nine week periods ended September 25, 2016 and September 27, 2015, (ii) the condensed consolidated statements of comprehensive (loss) income for the thirteen and thirty-nine week periods ended September 25, 2016 and September 27, 2015, (iii) the condensed consolidated balance sheets at September 25, 2016 and December 27, 2015, (iv) the condensed consolidated statements of cash flows for the thirty-nine week periods ended September 25, 2016 and September 27, 2015, and (v) the condensed consolidated statement of shareholders’ equity for the thirty-nine week period ended September 25, 2016. 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 27, 2015, included in this report, was derived from our 2015 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]	Earnings Per Share In accordance with U.S. GAAP, basic earnings per share is computed by dividing net income for the period by the weighted average number of common shares outstanding for the period. For the purposes of calculating diluted earnings per share, net income is divided by the total of the weighted average shares outstanding plus the dilutive effect of our outstanding stock options and time and performance based restricted stock units under the treasury stock method, which includes consideration of stock-based compensation required by U.S. GAAP.
Cash and Cash Equivalents, Policy [Policy Text Block]	The company's short-term investments include certificates of deposit and fixed deposits with original maturities of three months or less. Certificates of deposit and fixed deposits whose original maturity is greater than three months and is one year or less are classified as short-term investments 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 sheets.
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	New Accounting Pronouncements In May 2014, the FASB issued an Accounting Standards Update ("ASU') entitled “Revenue from Contracts with Customers.” The ASU requires that an entity recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. In August 2015, the FASB approved a one-year deferral of the effective date. Under the standard it is required to be adopted by public business entities in annual periods beginning on or after December 15, 2017. We are evaluating the impact this guidance will have on our financial position and statement of operations. In July 2015, the FASB issued an ASU entitled “Simplifying the Measurement of Inventory.” The ASU replaces the current lower of cost or market test with a lower of cost or net realizable value test when cost is determined on a first-in, first-out or average cost basis. The standard is effective for public entities for annual reporting periods beginning after December 15, 2016, and interim periods therein. It is to be applied prospectively and early adoption is permitted. We are evaluating the impact this guidance will have on our financial position and statement of operations. In February 2016, the FASB issued an ASU entitled "Leases." The ASU requires an entity to recognize right-of-use assets and lease liabilities on its balance sheet and disclose key information about leasing arrangements. The ASU offers specific accounting guidance for a lessee, a lessor and sale and leaseback transactions. Lessees and lessors are required to disclose qualitative and quantitative information about leasing arrangements to enable a user of the financial statements to assess the amount, timing and uncertainty of cash flows arising from leases. For public companies, the ASU is effective for annual reporting periods beginning after December 15, 2018, including interim periods within that reporting period, and requires a modified retrospective adoption, with early adoption permitted. We are evaluating the impact this guidance will have on our financial position and statement of operations. In March 2016, the FASB issued an ASU entitled "Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting." The objective of the ASU is to simplify several aspects of the accounting for employee share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. This ASU is effective for fiscal years beginning after December 15, 2016, including interim periods within those fiscal years. Early adoption is permitted. We are evaluating the impact this guidance will have on our financial position and statement of operations. In August 2016, the FASB issued an ASU entitled "Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments." The objective of the ASU is to address the diversity in practice in the presentation of certain cash receipts and cash payments in the statement of cash flows. This ASU is effective for fiscal years beginning after December 15, 2017, including interim periods within those fiscal years. Early adoption is permitted. We are evaluating the impact this guidance will have on our statement of cash flows.

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.