Fair Value Measurements (Assets Measured on Nonrecurring Basis) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Aug. 31, 2016	Aug. 31, 2015	Aug. 31, 2016	Aug. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment of intangible assets	$ 5,051,000	$ 0	$ 5,051,000	$ 0
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Intangible assets at fair value	0		0
Impairment of intangible assets	$ 5,100,000		$ 5,051,000