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Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 29, 2017	Dec. 30, 2016	Jan. 01, 2016
Commitments And Contingencies Disclosure [Line Items]
Purchase Obligation	$ 1,696,000
Property Leases [Member]
Commitments And Contingencies Disclosure [Line Items]
Operating Leases, Rent Expense	6,712,000	$ 6,478,000	$ 6,202,000
Other Operating Leases and Commitments [Member]
Commitments And Contingencies Disclosure [Line Items]
Operating Costs and Expenses	$ 1,710,000	$ 1,749,000	$ 1,794,000

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- References

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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

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- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 840
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41499-112717

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- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

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No definition available.

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