Revenue And Recognition (Schedule Of Contract Liabilities From Contract With Customers) (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 30, 2019 |
Dec. 29, 2018 |
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| Revenue And Contract Liabilities [Abstract] | ||
| Contract liabilities at beginning of period | $ 15,055 | $ 14,417 |
| Increase due to deferral of revenue at period end | 14,191 | 15,055 |
| Decrease due to beginning contract liabilities recognized as revenue | (14,291) | (14,417) |
| Contract liabilities at end of period | $ 14,955 | $ 15,055 |
| X | ||||||||||
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Contract with Customer, Liability, Increase (Decrease) In Deferred Revenue No definition available.
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| X | ||||||||||
- Definition Contract with Customer, Liability, Increase (Decrease) Revenue Recognized No definition available.
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