Premises, Equipment and Leases (Summary Of The Carrying Value Of Banking Premises And Equipment) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Sep. 30, 2023
Property, Plant and Equipment [Line Items]
Total premises and equipment	$ 199,285	$ 192,239
Less accumulated depreciation	107,822	100,708
Premises and equipment, net	91,463	91,531
Land [Member]
Property, Plant and Equipment [Line Items]
Total premises and equipment	16,070	16,045
Building and Improvements [Member]
Property, Plant and Equipment [Line Items]
Total premises and equipment	128,730	123,830
Furniture, Fixtures and Equipment [Member]
Property, Plant and Equipment [Line Items]
Total premises and equipment	$ 54,485	$ 52,364