Income Tax - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017	Dec. 29, 2017
Income Tax Disclosure [Abstract]
U.S. statutory tax rate			21.00%		35.00%
Income tax provision	$ 2,895	$ 3,106	$ 5,388	$ 7,600
Effective tax rate	13.20%	13.30%	11.00%	18.00%
Undistributed earnings of foreign subsidiaries	$ 207,600		$ 207,600
Gross liability for unrecognized tax benefits	$ 300	$ 300	$ 300	$ 300

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile.

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Amount of unrecognized tax benefits.

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