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Commitments and Contingencies Warranty Liabilities (Details) - USD ($) $ in Thousands	9 Months Ended
	Oct. 03, 2015	Sep. 27, 2014
Warranty Liabilities [Roll Forward]
Balance at beginning of year	$ 5,824	$ 4,153
Additions charged to costs and expenses for current-year sales	7,514	6,119
Deductions from reserves	(4,995)	(5,434)
Changes in liability for pre-existing warranties during the current year, including expirations	1,426	268
Balance at end of period	$ 9,769	$ 5,106

X

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

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X

- 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://www.xbrl.org/2003/role/presentationRef



-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=51674963&loc=d3e12565-110249

+ Details

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Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 460



-SubTopic 10



-Section 50



-Paragraph 8



-Subparagraph ((c)(2))



-URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249

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X

- Definition

Represents the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard product warranties (including adjustments related to changes in estimates). Does not include any Increase or Decrease in the liability for accruals related to extended product warranties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 460



-SubTopic 10



-Section 50



-Paragraph 8



-Subparagraph ((c)(4))



-URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249

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- Definition

Represents the aggregate increase in the liability for accruals related to standard product warranties issued during the reporting period. Does not include any increase in the liability for accruals related to extended product warranties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 460



-SubTopic 10



-Section 50



-Paragraph 8



-Subparagraph ((c)(3))



-URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249

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