Securities (Schedule Of Carrying Value Of Securities Pledged As Collateral) (Details) - USD ($) $ in Thousands |
Mar. 31, 2025 |
Sep. 30, 2024 |
|---|---|---|
| Marketable Securities [Line Items] | ||
| AFS Securities | $ 961,417 | $ 856,266 |
| Asset Pledged as Collateral [Member] | ||
| Marketable Securities [Line Items] | ||
| AFS Securities | 188,755 | 220,029 |
| Asset Pledged as Collateral [Member] | FRB of Kansas City borrowings [Member] | ||
| Marketable Securities [Line Items] | ||
| AFS Securities | 99,901 | 111,281 |
| Asset Pledged as Collateral [Member] | Public unit deposits [Member] | ||
| Marketable Securities [Line Items] | ||
| AFS Securities | $ 88,854 | $ 108,748 |