Fair Value (Details) - USD ($) $ in Thousands	Feb. 29, 2016	Nov. 30, 2015	Feb. 28, 2015
Financial assets and liabilities carried at fair value and measured at fair value on a recurring basis:
Marketable equity securities	$ 1,577	$ 1,970
Interest rate swap liabilities	4,240		$ 2,766
Recurring basis | Level 1
Financial assets and liabilities carried at fair value and measured at fair value on a recurring basis:
Marketable equity securities	1,577	1,970
Recurring basis | Level 2
Financial assets and liabilities carried at fair value and measured at fair value on a recurring basis:
Interest rate swap liabilities	$ 4,240	$ 2,766