Compensation Plans - Compensation Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Nov. 30, 2019	Nov. 30, 2018	Nov. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	$ 348,600	$ 308,500	$ 284,200
Restricted cash awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	314,700	274,400	251,600
Restricted stock and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	26,700	27,600	26,600
Profit sharing plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation cost	7,200	6,500	6,000
Deferred Compensation Plan | Restricted stock and RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted cash awards	$ 377	$ 346	$ 227