XML 68 R57.htm IDEA: XBRL DOCUMENT
v3.23.3

Accumulated Other Comprehensive (Loss) Income (Narrative) (Details) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 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

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