Exit Costs - Restructuring and Impairment Costs (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	May 31, 2016	May 31, 2015	May 31, 2016	May 31, 2015
Restructuring Cost and Reserve [Line Items]
Impairment costs	$ 605	$ 28,570	$ 1,854	$ 28,570
Compensation and Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	(93)	20,019	320	20,019
Technology and Communications [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	678	6,260	1,234	6,260
Professional Services [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	0	2,033	0	2,033
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	20	258	300	258
Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	(103)	15,559	279	15,559
Accelerated Amortization of Restricted Stock and Restricted Cash Awards [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	10	4,460	41	4,460
Contract Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	678	6,260	1,234	6,260
Other Costs [Member]
Restructuring Cost and Reserve [Line Items]
Impairment costs	$ 20	$ 2,291	$ 300	$ 2,291