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Other Real Estate Owned (Tables) | 12 Months Ended
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Dec. 31, 2024
Other Real Estate Owned [Abstract] |
Other Real Estate Owned |
(Dollars in thousands) | 2024 |  |  | 2023 |  |  | 2022 |
Balance, beginning of year | $ | 122 |  |  | $ | - |  |  | $ | 194 |
Transfers from loans |  | 650 |  |  |  | 267 |  |  |  | - |
Proceeds from sales |  | (345 | ) |  |  | (157 | ) |  |  | (235 | )
Write-downs |  | - |  |  |  | - |  |  |  | - |
Gains on sales |  | 46 |  |  |  | 12 |  |  |  | 41 |
Balance, end of year | $ | 473 |  |  | $ | 122 |  |  | $ | - |

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- Definition Other Real Estate Owned. + References No definition available. + Details
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Namespace Prefix: | cofs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure of other real estate owned. + References No definition available. + Details
Name: | cofs_OtherRealEstateOwnedTableTextBlock
Namespace Prefix: | cofs_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration