Accounting Developments (Details) - USD ($) $ in Thousands		12 Months Ended
	Dec. 01, 2020	Nov. 30, 2020	Dec. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201602Member
Operating leases amount in our Consolidated Statement of Financial Condition		$ 560,887
Subsequent event
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member
Cumulative effect, period of adoption, adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Premises and equipment - ROU assets			$ 519,900
Operating leases amount in our Consolidated Statement of Financial Condition			$ 586,300
Cumulative effect, period of adoption, adjustment | Subsequent event
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Provision for credit losses	$ 3,600
Retained earnings (accumulated deficit)	$ 2,700