Lines of Credit and Long-Term Debt Lines of Credit and Long-Term Debt (Details) (USD $)	12 Months Ended
	Dec. 29, 2012	Nov. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 120,000,000	$ 140,000,000
Line of Credit Facility, Increase, Additional Borrowings	25,000,000
Debt, Weighted Average Interest Rate	4.70%		3.10%	1.50%
debt instrument, minimum credit availabilty requirement amount	7,000,000
debt instrument, minimum credit availability requirement percentage	10.00%
Line of Credit Facility, Current Borrowing Capacity	91,700,000		86,900,000
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums	1,000,000		600,000
Letters of Credit Outstanding, Amount	$ 5,100,000		$ 8,300,000
Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate, for Prime Rate	0.50%
Debt Instrument, Basis Spread on Variable Rate, for LIBOR	1.50%
Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate, for Prime Rate	1.00%
Debt Instrument, Basis Spread on Variable Rate, for LIBOR	2.00%