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Benefit Plans (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended | 15 Months Ended |  |
--- | --- | --- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019 | Sep. 30, 2022 | Jul. 01, 2023 | Jul. 01, 2022
Life Insurance Benefits [Member] |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Benefit plan expense |  |  |  | $ 12 | $ 3 | $ 13 |  |  |  |  |  |
Accrued interest payable and other liabilities Total |  |  |  | 126 | 139 |  |  |  |  |  |  |
Deferred Cash Incentive Agreements [Member] |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Benefit plan expense |  |  |  | 129 | 262 | 118 |  |  |  |  |  |
Accrued interest payable and other liabilities Total |  |  |  | 509 | 380 |  |  |  |  |  |  |
401 (k) plan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total contributions |  |  |  | $ 92 | 301 | 343 |  |  |  |  |  |
Percentage of amount allowable under federal tax regulations |  |  |  | 50.00% |  |  |  |  |  |  |  |
Percentage of compensation contributed under federal tax regulations |  |  |  | 8.00% |  |  |  |  |  |  |  |
Salary Continuation Agreement [Member] |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Benefit plan expense |  |  |  | $ 5 | 6 | $ 7 |  |  |  |  |  |
Accrued interest payable and other liabilities Total |  |  |  | 95 | $ 115 |  |  |  |  |  |  |
Annual benefit for 20 years |  |  |  | $ 25 |  |  |  |  |  |  |  |
Duration of Annual benefit |  |  |  | 20 years |  |  |  |  |  |  |  |
Multi-Employer Pension Plan [Member] |  |  |  |  |  |  |  |  |  |  |  |
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Funding (surplus) shortfall | $ 180 | $ (102) |  |  |  |  |  |  |  |  |  |
CFBank's contributions | $ 24 | $ 19 | $ 22 |  |  |  |  |  |  |  |  |
Funded status |  |  |  |  |  |  |  |  |  |  | 81.12% | 90.10%
Total contributions |  |  |  |  |  |  | $ 248,563 |  |  | $ 142,405 |  |
Percentage of amount allowable under federal tax regulations |  |  |  |  |  |  |  | 5.00% | 5.00% |  |  |

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