Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
	Jan. 02, 2015	Jan. 03, 2014	Dec. 28, 2012
Commitments And Contingencies Disclosure [Line Items]
Purchase Obligation	$ 320,000
Property Leases [Member]
Commitments And Contingencies Disclosure [Line Items]
Operating Leases, Rent Expense	5,951,000	5,929,000	5,481,000
Other Operating Leases and Commitments [Member]
Commitments And Contingencies Disclosure [Line Items]
Operating Costs and Expenses	$ 1,965,000	$ 1,704,000	$ 1,754,000