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Revenue And Contract Liabilities (Tables) | 6 Months Ended
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Jun. 29, 2019
Revenue And Contract Liabilities [Abstract] |
Schedule Of Contract Liabilities From Contract With Customers |
|  | December 29, |  | June 29,
|  | 2018 |  | 2019
Contract liabilities at beginning of period |  | $ | 14,417 |  | $ | 15,055
Increase due to deferral of revenue at period end |  |  | 15,055 |  |  | 13,798
Decrease due to beginning contract liabilities recognized as revenue |  |  | (14,417) |  |  | (14,546)
Contract liabilities at end of period |  | $ | 15,055 |  | $ | 14,307

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- Definition Tabular disclosure of contract balances and changes in contract balances. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130551-203045 + Details
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Period Type: | duration

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- References No definition available. + Details
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