Warranty Accrual Included in Other Accrued Liabilities (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jul. 01, 2018	Jul. 02, 2017	Jul. 01, 2018	Jul. 02, 2017
Product Warranty Liability [Line Items]
Balance at beginning of period	$ 7,548	$ 7,054	$ 8,200	$ 7,203
Acquisition	41		41
Accruals for warranties issued during the period	3,348	5,294	6,411	8,315
Adjustments related to pre-existing warranties	(34)	7	(173)	(464)
Settlements made during the period	(3,767)	(3,262)	(7,343)	(5,961)
Balance at end of period	$ 7,136	$ 9,093	$ 7,136	$ 9,093

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.15(5))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Section 50
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- Definition

Amount of increase in the standard and extended product warranty accrual from a business acquisition.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 460
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- Definition

Amount of decrease in the standard and extended product warranty accrual from payments made in cash or in kind to satisfy claims under the terms of the standard and extended product warranty.

+ References

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Amount of increase (decrease) in the standard and extended product warranty accrual from changes in estimates attributable to preexisting product warranties.

+ References

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Amount of increase in the standard and extended product warranty accrual from warranties issued.

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-Name Accounting Standards Codification
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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