Loans And Allowance For Loan Losses (Summary Of Troubled Debt Restructured Loans Restructured During the Period By Type Of Concession) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	$ 4,250	$ 10,976	$ 8,961	$ 18,797
Initial Restructuring
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	2,483	5,006	3,797	11,578
Multiple Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	1,007	5,068	3,800	5,070
Bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	760	902	1,364	2,149
Residential Core
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	2,520	6,283	5,316	9,973
Residential Core | Initial Restructuring
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	1,714	2,713	2,513	5,479
Residential Core | Multiple Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	354	2,921	2,024	2,923
Residential Core | Bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	452	649	779	1,571
Residential Home Today
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	1,176	1,799	2,228	2,196
Residential Home Today | Initial Restructuring
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	322	172	587	444
Residential Home Today | Multiple Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	581	1,447	1,330	1,447
Residential Home Today | Bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	273	180	311	305
Home Equity Loans And Lines Of Credit
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	554	2,894	1,417	6,628
Home Equity Loans And Lines Of Credit | Initial Restructuring
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	447	2,121	697	5,655
Home Equity Loans And Lines Of Credit | Multiple Restructurings
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	72	700	446	700
Home Equity Loans And Lines Of Credit | Bankruptcy
Financing Receivable, Troubled Debt Restructuring [Line Items]
Troubled debt restructured loans restructured in the period	$ 35	$ 73	$ 274	$ 273