Loans And Allowance For Loan Losses (Schedule Of Recorded Investment In Troubled Debt Restructured Loans By Type Of Concession) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Sep. 30, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	$ 148,259	$ 157,408
Initial Restructuring
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	81,912	86,521
Multiple Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	43,214	44,934
Bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	23,133	25,953
Residential Core
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	74,930	80,274
Residential Core | Initial Restructuring
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	33,879	35,829
Residential Core | Multiple Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	23,871	24,951
Residential Core | Bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	17,180	19,494
Residential Home Today
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	34,875	36,335
Residential Home Today | Initial Restructuring
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	15,580	16,233
Residential Home Today | Multiple Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	16,120	16,868
Residential Home Today | Bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	3,175	3,234
Home Equity Loans And Lines Of Credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	38,454	40,799
Home Equity Loans And Lines Of Credit | Initial Restructuring
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	32,453	34,459
Home Equity Loans And Lines Of Credit | Multiple Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	3,223	3,115
Home Equity Loans And Lines Of Credit | Bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructuring, recorded investment	$ 2,778	$ 3,225