Exit Costs - Restructuring and Impairment Costs (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	May 31, 2016	May 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	$ 605	$ 1,854
Compensation and Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	(93)	320
Technology and Communications [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	678	1,234
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	20	300
Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	(103)	279
Accelerated Amortization of Restricted Stock and Restricted Cash Awards [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	10	41
Contract Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	678	1,234
Other Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	$ 20	$ 300