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v3.22.2.2

SECURITIES - Narrative (Details) | 12 Months Ended
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Sep. 30, 2022 USD ($) security | Sep. 30, 2021 USD ($) | Sep. 30, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |
Number of securities in an unrealized loss position | security | 195 |  |
Securities pledged as collateral for public funds on deposit | $ 0 | $ 0 |
Securities pledged as collateral for individual, trust, and estate deposits | 0 | 0 |
Equity securities without readily determinable fair value, amount | 18,200,000 | 16,000,000 |
Federal reserve bank stock | 19,700,000 | 19,700,000 |
Federal Reserve Bank and Federal Home Loan Bank Stock, at cost | 9,100,000 | 8,700,000 |
Loans | 3,490,358,000 | 3,541,282,000 |
Impairment recognized | 0 | 2,600,000 | $ 1,300,000
Estimated Fair Value |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Loans and leases | 3,525,803,000 | 3,616,646,000 |
Marketable |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Equity securities | 2,900,000 | 12,700,000 |
Unrealized gains (losses) on marketable equity securities | (3,800,000) | (3,400,000) |
Realized gains (loss) on marketable equity securities | 300,000 |  |
Non-marketable |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Equity securities | 7,200,000 | 4,600,000 |
Unrealized gains (losses) on marketable equity securities | 1,100,000 | 600,000 |
Realized gains (loss) on marketable equity securities | (1,700,000) |  |
Asset Pledged as Collateral |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Investments | 924,200,000 | 236,100,000 |
Loans | 0 | 0 |
Asset Pledged as Collateral with Right | Estimated Fair Value | Short-term FHLB advances |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Loans and leases | 804,000,000 | 644,700,000 |
Federal Home Loan Bank |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Interest and dividend income from FLHB | 300,000 | 200,000 | $ 800,000
Federal Reserve Bank |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |
Interest and dividend income from FLHB | $ 1,200,000 | $ 1,500,000 |

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