Note 7 - Retirement Plans (Detail) - Assumptions used to determine the net periodic costs for the pension and other benefit plans:	12 Months Ended
	Dec. 31, 2012	Dec. 25, 2011
Pension Plans, Defined Benefit [Member]
Discount rate	4.80%	5.60%
Expected return on plan assets	8.00%	8.00%
Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member]
Discount rate	4.50%	5.20%
Compensation increase rate	3.00%	3.50%