Fair Value (Details) (USD $) In Thousands, unless otherwise specified	Aug. 31, 2014	Nov. 30, 2013
Financial assets and liabilities carried at fair value and measured at fair value on a recurring basis:
Interest rate swap asset	$ 44
Interest rate swap liabilities	2,130
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	1,916	2,208
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	44	63
Interest rate swap liabilities	$ 2,130	$ 2,285