Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Nov. 30, 2013	Dec. 01, 2012
Financial assets and liabilities carried at fair value and measured at fair value on a recurring basis:
Interest rate swap asset	$ 63
Interest rate swap liabilities	2,285	3,191
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Financial assets and liabilities carried at fair value and measured at fair value on a recurring basis:
Marketable equity securities	2,208	4,226
Recurring basis | Significant Observable Inputs (Level 2)
Financial assets and liabilities carried at fair value and measured at fair value on a recurring basis:
Interest rate swap asset	63
Interest rate swap liabilities	$ 2,285	$ 3,191