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Product Warranties - Current and Long Term Warranty (Details) - USD ($) $ in Thousands	Mar. 30, 2019	Dec. 29, 2018	Mar. 31, 2018	Dec. 30, 2017
Product Warranties Disclosures [Abstract]
Current - in the next twelve months	$ 9,355	$ 9,455
Long-term - beyond one year	6,156	5,995
Total estimated settlements	$ 15,511	$ 15,450	$ 15,438	$ 15,388

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- References

No definition available.

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- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (c)(1),(c)(5)
-URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249

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- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid within one year or the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability.

+ References

No definition available.

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- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability that is expected to be paid after one year or beyond the normal operating cycle, if longer. Does not include the balance for the extended product warranty liability.

+ References

No definition available.

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