| Line Item | Jun 30, 2026 | Mar 31, 2026 | Dec 31, 2025 | Sep 30, 2025 | Jun 30, 2025 | Mar 31, 2025 | Dec 31, 2024 | Sep 30, 2024 | Jun 30, 2024 | Mar 31, 2024 | Dec 31, 2023 | Sep 30, 2023 | Jun 30, 2023 | Mar 31, 2023 | Dec 31, 2022 | Sep 30, 2022 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Interest Income | ||||||||||||||||
| Interest and fees on loans | ||||||||||||||||
| Interest and dividends on investment securities | ||||||||||||||||
| Interest on balances with other banks and short-term investments | ||||||||||||||||
| Total interest income | ||||||||||||||||
| Interest Expense | ||||||||||||||||
| Interest on deposits | ||||||||||||||||
| Interest on customer repurchase agreements | ||||||||||||||||
| Interest on other short-term borrowings | ||||||||||||||||
| Interest on long-term borrowings | ||||||||||||||||
| Total interest expense | ||||||||||||||||
| Net Interest Income | ||||||||||||||||
| Provision for Credit Losses | ||||||||||||||||
| Provision for (Reversal of) Credit Losses for Unfunded Commitments | ||||||||||||||||
| Net Interest Income (Loss) After Provision for (Reversal of) Credit Losses | ||||||||||||||||
| Noninterest Income | ||||||||||||||||
| Service charges on deposits | ||||||||||||||||
| Gain (loss) on sale of loans | ||||||||||||||||
| Net gain (loss) on sale of investment securities | ||||||||||||||||
| Increase in the cash surrender value of bank-owned life insurance | ||||||||||||||||
| Other income | ||||||||||||||||
| Total noninterest income | ||||||||||||||||
| Noninterest Expense | ||||||||||||||||
| Salaries and employee benefits | ||||||||||||||||
| Premises and equipment expenses | ||||||||||||||||
| Marketing and advertising | ||||||||||||||||
| Data processing | ||||||||||||||||
| Legal, accounting and professional fees | ||||||||||||||||
| FDIC insurance | ||||||||||||||||
| Other expenses | ||||||||||||||||
| Total noninterest expense | ||||||||||||||||
| Income (Loss) Before Income Tax Expense | ||||||||||||||||
| Income Tax Expense (Benefit) | ||||||||||||||||
| Net Income (Loss) | ||||||||||||||||
| Basic (in dollars per share) | — | |||||||||||||||
| Diluted (in dollars per share) | — |