Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Mar. 29, 2020
Accounting Policies [Abstract]
Cash, Cash Equivalents, and Investments	Cash, Cash Equivalents, and Investments Money market instruments, as well as certificates of deposits and debt securities with original maturities of three months or less, are classified as cash equivalents and are stated at amortized cost. Certificates of deposit and debt securities with original maturities greater than three months and remaining maturities of one year or less are classified as current investments. Debt securities with remaining maturities greater than one year are classified as non-current investments. It is the Company’s policy to invest in debt securities with effective maturities that do not exceed ten years. Debt securities with original maturities greater than three months are designated as available-for-sale and are reported at fair value, with unrealized gains and losses, net of tax and credit losses, recorded in shareholders’ equity as other comprehensive income (loss). Realized gains and losses are included in current operations, along with the amortization of the discount or premium on debt securities arising at acquisition, and are calculated using the specific identification method. The Company’s limited partnership interest is accounted for using the cost method because the Company’s investment is less than 5% of the partnership and the Company has no influence over the partnership’s operating and financial policies. The carrying value of this investment has been reduced to zero, and therefore, distributions are recorded as investment income as they occur. Management monitors the carrying value of its investments in debt securities compared to their fair value to determine whether a credit loss or other type of impairment has occurred. If the fair value of a debt security is less than its amortized cost, the Company assesses whether the decline has resulted from a credit loss or other factors. In assessing whether a credit loss exists, the Company compares the present value of the cash flows expected to be collected from the security with the amortized cost basis of the security. If the present value of the cash flows expected to be collected is less than the amortized cost basis of the security, then a credit loss exists and an allowance for credit losses is recorded. The allowance for credit losses is limited by the amount that the fair value is less than the amortized cost basis of the security. Credit losses on impaired securities continue to be measured in subsequent periods, using the present value of expected future cash flows, and changes in the expected credit losses are recorded in current operations. Credit losses are included in "Other income (expense)" on the Consolidated Statement of Operations. When developing an estimate of the expected credit losses, the Company considers all available information relevant to assessing the collectability of cash flows. This information includes internal and external factors, historical and current events, reasonable and supportable forecasts including management's expectations of future economic conditions, the type of security, the credit rating of the security, the size of the loss position, as well as other relevant information. An impairment is recognized as a write-down if (i) the Company has the intent to sell the security or (ii) it is more likely than not that the Company will be required to sell the security before recovery of the entire amortized cost basis. If impairment is considered upon condition (i) or (ii) described above, the debt security's amortized cost basis is written-down to its fair value and the impairment is recognized in current operations. Subsequent increases in the fair value of the debt securities after the write-down are included in shareholders' equity as other comprehensive income. The differences between the new amortized cost basis and the cash flows expected to be collected are accreted as interest income. Unrealized losses, that have not been recorded through an allowance for credit losses or write-down of the debt security, are recorded in shareholders' equity as other comprehensive loss, net of the applicable taxes.
Accounts Receivable	Accounts Receivable The Company extends credit with various payment terms to customers based upon an evaluation of their financial condition. Accounts that are outstanding longer than the payment terms are considered to be past due. The Company establishes an allowance against accounts receivable for potential credit losses and records bad debt expense in current operations when it determines receivables are at risk for collection based upon the length of time the receivable has been outstanding, the customer’s current ability to pay its obligations to the Company, general economic and industry conditions, reasonable forecasts about the future, as well as various other factors. Receivables are written off against this allowance in the period they are determined to be uncollectible and payments subsequently received on previously written-off receivables are recorded as a reversal of the bad debt expense. Credit losses are included in "Selling, general, and administrative expenses" on the Consolidated Statement of Operations.
New Pronouncements	ew Pronouncements Accounting Standards Update (ASU) 2019-12, "Simplifying the Accounting for Income Taxes" ASU 2019-12 applies to all entities within the scope of Topic 740, Income Taxes. The amendments in this ASU simplify the accounting for income taxes by removing the following exceptions: 1) exception to the incremental approach for intraperiod tax allocation when there is a loss from continuing operations and income or a gain from other items; 2) exception to the requirement to recognize a deferred tax liability for equity method investments when a foreign subsidiary becomes an equity method investment; 3) exception to the ability not to recognize a deferred tax liability for a foreign subsidiary when a foreign equity method investment becomes a subsidiary; and 4) exception to the general methodology for calculating income taxes in an interim period when a year-to-date loss exceeds the anticipated loss for the year. The amendments in this ASU also simplify the accounting for income taxes by doing the following: 1) requiring that an entity recognize a franchise tax that is partially based on income as an income-based tax and account for any incremental amount incurred as a non-income-based tax; 2) requiring that an entity evaluate when a step up in the tax basis of goodwill should be considered part of the business combination in which the book goodwill was originally recognized and when it should be considered a separate transaction; 3) specifying that an entity is not required to allocate the consolidated amount of current and deferred tax expense to a legal entity that is not subject to tax in its separate financial statements; and 4) requiring that an entity reflect the effect of an enacted change in tax laws or rates in the annual effective tax rate computation in the interim period that included the enacted date. The amendments in this ASU are effective for public companies for annual periods, and interim periods within those annual periods, beginning after December 15, 2020. Early adoption is permitted; however, an entity that elects to early adopt the amendments must adopt all the amendments in the same period. The amendments in this ASU related to separate financial statements of legal entities that are not subject to tax should be applied on a retrospective basis for all periods presented. The amendments related to changes in ownership of foreign equity method investments or foreign subsidiaries should be applied on a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. The amendments related to franchise taxes that are partially based on income should be applied on either a retrospective basis for all periods presented or a modified retrospective basis through a cumulative-effect adjustment to retained earnings as of the beginning of the fiscal year of adoption. All other amendments should be applied on a prospective basis. Management does not expect ASU 2019-12 to have a material impact on the Company's consolidated financial statements and disclosures. Accounting Standards Update (ASU) 2020-04, "Reference Rate Reform (Topic 848)" The amendments in this ASU apply to all entities that have contracts, hedging relationships, and other transactions that reference LIBOR or another reference rate expected to be discontinued because of reference rate reform. The amendments in this ASU provide optional expedients and exceptions for applying generally accepted accounting principles (GAAP) to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The expedients and exceptions provided by the amendments do not apply to contract modifications made and hedging relationships entered into or evaluated after December 31, 2022, except for hedging relationships existing as of December 31, 2022, that an entity has elected certain optional expedients for and that are retained through the end of the hedging relationship. The amendments in this ASU are effective for all entities as of March 12, 2020 through December 31, 2022. Management does not expect ASU 2020-04 to have a material impact on the Company's consolidated financial statements and disclosures.