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v3.23.2

Accumulated Other Comprehensive (Loss) Income (Narrative) (Details) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Equity [Abstract] |  |  |  |
Combined Federal and State income tax rate (percent) | 24.00% | 24.00% | 24.00% | 24.00%

X
- Definition Combined Federal And State Income Tax Rate + References No definition available. + Details
Name: | chco_CombinedFederalAndStateIncomeTaxRate
Namespace Prefix: | chco_
Data Type: | dtr-types1:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_EquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration