Leases (Information Related to Leases in Consolidated Statement of Financial Condition) (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Dec. 01, 2019
Property, Plant and Equipment [Line Items]
Property, equipment and leasehold improvements, net - ROU assets		$ 545,800
Weighted average remaining lease term (in years)	10 years 9 months 18 days
Weighted average discount rate	2.90%
Premises and Equipment
Property, Plant and Equipment [Line Items]
Property, equipment and leasehold improvements, net - ROU assets	$ 521,278