Leases - Finance Lease ROU assets (Details) - USD ($) $ in Thousands	Aug. 31, 2020	Dec. 01, 2019
Property, Plant and Equipment [Line Items]
Premises and equipment - ROU assets		$ 519,900
Weighted average remaining lease term (in years)	11 years 1 month 6 days
Weighted average discount rate	2.90%
Premises and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment - ROU assets	$ 499,856