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Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Jan. 03, 2016
Defined Contribution Pension And Other Postretirement Plans Disclosure [Abstract]
Employer matching and profit-sharing contributions	$ 1.8	$ 1.8	$ 2.0

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- References

No definition available.

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- Definition

Amount of discretionary contributions made by an employer to a defined contribution plan.

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No definition available.

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