Note 7 - Retirement Plans (Detail) - Funded status of the Plans: (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 25, 2011
Noncurrent liabilities	$ (242,309)	$ (223,132)
Pension Plans, Defined Benefit [Member]
Current liabilities	(3,464)	(2,931)
Noncurrent liabilities	(212,404)	(178,424)
Net amount recognized	(215,868)	(181,355)
Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member]
Current liabilities	(2,090)	(3,276)
Noncurrent liabilities	(25,348)	(36,323)
Net amount recognized	$ (27,438)	$ (39,599)