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Taxes on Income - Additional Information (Detail) - USD ($) $ in Millions	Dec. 30, 2017	Dec. 31, 2016
Income Tax Expense Benefit Continuing Operations [Line Items]
Uncertain tax positions included in unrecognized tax benefits		$ 1.3
Forecast [Member]
Income Tax Expense Benefit Continuing Operations [Line Items]
Impact of unrecognized tax benefits settlement on effective tax rate	$ 0.9

X

- Definition

Income tax expense benefit continuing operations.

+ References

No definition available.

+ Details

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- Definition

Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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- Definition

The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319

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