Note 10 - Anticipated Payments and Insurance Proceeds of Identified Environmental Remediation Liabilities (Details) $ in Thousands	Nov. 28, 2015 USD ($)
Estimated costs – current dollars	$ 7,072
Estimated costs – current dollars	1,829
Estimated costs – current dollars	1,476
Estimated costs – current dollars	1,309
Estimated costs – current dollars	1,361
Estimated costs – current dollars	12,493
Estimated costs – current dollars	25,540
Estimated insurance proceeds	(151)
Estimated insurance proceeds	(173)
Estimated insurance proceeds	(159)
Estimated insurance proceeds	(173)
Estimated insurance proceeds	(159)
Estimated insurance proceeds	(1,293)
Estimated insurance proceeds	(2,108)
Net anticipated costs	6,921
Net anticipated costs	1,656
Net anticipated costs	1,317
Net anticipated costs	1,136
Net anticipated costs	1,202
Net anticipated costs	11,200
Net anticipated costs	23,432
Effect of inflation	7,422
Effect of discounting	(7,861)
Balance as of November 28, 2015	$ 22,993