Exit Costs - Restructuring and Impairment Costs (Details) $ in Thousands	3 Months Ended
	Feb. 29, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	$ 1,249
Compensation and Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	413
Technology and Communications [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	556
Other Expense [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	280
Severance Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	382
Accelerated Amortization of Restricted Stock and Restricted Cash Awards [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	31
Contract Termination Costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	556
Other Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and impairment costs	$ 280