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v3.23.2

Fair Value Measurements - Additional Information (Details) - USD ($) | 9 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Sep. 30, 2022
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Available-for-sale securities purchased | $ 317,027,000 | $ 516,163,000 |
Proceeds from sales of available-for-sale securities | 94,000 | 4,510,000 |
Held-to-maturity securities purchased | 0 | (195,358,000) |
Proceeds from sale of held-to-maturity securities | $ 0 | $ 0 |
Term of contractual due dates of substantially all mortgage-backed securities (in years) | 10 years |  |
Accrued interest for available-for-sale securities | $ 7,701,000 |  | $ 5,694,000
Accrued interest for held-to-maturity securities | 1,038,000 |  | $ 1,108,000
Consumer loans | Single-family residential |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Foreclosed residential real estate properties held as REO | 121,000 |  |
Real estate acquired through foreclosure | $ 2,840,000 |  |

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