Note 7 - Debt (Details) (USD $)	12 Months Ended
	Dec. 29, 2013	Dec. 30, 2012
Note 7 - Debt (Details) [Line Items]
Delayed Funding Option Term, Maximum	35 days
Facility Fee [Member] | Securitization Facility [Member]
Note 7 - Debt (Details) [Line Items]
Line of Credit Facility, Commitment Fee Percentage (in Basis Points)	0.40%
Revolving Line of Credit [Member]
Note 7 - Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 200,000,000	$ 150,000,000
Line of Credit Facility, Amount Outstanding	0	0
Line of Credit Facility, Remaining Borrowing Capacity	200,000,000	150,000,000
Line of Credit Facility, Commitment Fee Percentage (in Basis Points)	0.25%
Securitization Facility [Member] | Standby Letter of Credit Related to Workers' Compensation [Member]
Note 7 - Debt (Details) [Line Items]
Letters of Credit Outstanding, Amount	55,000,000	55,000,000
Securitization Facility [Member]
Note 7 - Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	150,000,000
Line of Credit Facility, Amount Outstanding	28,000,000	63,000,000
Line of Credit Facility, Remaining Borrowing Capacity	67,000,000	32,000,000
Line of Credit Facility, Interest Rate at Period End	0.97%	1.40%
Unsecured, uncommitted short-term local credit facilities [Member]
Note 7 - Debt (Details) [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	15,300,000
Line of Credit Facility, Amount Outstanding	$ 300,000	$ 1,100,000
Line of Credit Facility, Interest Rate at Period End	10.75%	9.56%