FINANCIAL STATEMENT POLICIES (Schedule Of Cash And Restricted Cash Equivalents) (Details) - USD ($) $ in Thousands	Apr. 04, 2020	Dec. 28, 2019	Mar. 30, 2019	Dec. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 245,427	$ 200,218	$ 271,442
Restricted cash included in prepaid expenses and other current assets	26		31
Restricted cash included in intangible and other assets-net	6,804		7,623
Cash, cash equivalents and restricted cash	$ 252,257	$ 207,749	$ 279,096	$ 410,883

Amount of cash and cash equivalents restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant