Debt and Financing Arrangements (Details) - USD ($)	3 Months Ended		8 Months Ended
	Sep. 10, 2016	Sep. 12, 2015	Sep. 10, 2016	Sep. 12, 2015	Jan. 02, 2016	Oct. 16, 2014
Debt Instrument [Line Items]
Interest costs incurred		$ 400,000		$ 1,400,000
Interest costs capitalized, less than $0.1 million for the third quarter of 2016		$ 100,000	$ 100,000	$ 439,000
Letters of credit outstanding	$ 3,000,000		3,000,000		$ 4,400,000
Current borrowing capacity	$ 8,600,000		$ 8,600,000		34,500,000
Weighted average interest rate	3.20%	3.10%	3.20%	3.10%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Interest costs incurred	$ 500,000		$ 1,500,000
Interest costs capitalized, less than $0.1 million for the third quarter of 2016	100,000		100,000
Line of Credit [Member] | Credit Facility [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 140,000,000
Long-term debt	67,500,000		67,500,000		70,900,000
Line of credit facility amount outstanding	0		0		0
Unamortized debt issuance costs	$ 900,000		$ 900,000		$ 1,400,000