XML 34 R22.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Contracts with Customers (Policies) | 9 Months Ended
--- | ---
Sep. 30, 2018
Revenue from Contract with Customer [Abstract] |
Service Charges | Service Charges: Service charges consist of service charges on deposit accounts (monthly service fees, account analysis fees, non-sufficient funds ("NSF") fees and other deposit account related fees). For transaction based fees, the Company's performance obligation is generally satisfied, and the related revenue recognized, at a point in time. For nontransaction based fees, the Company's performance obligation is generally satisfied, and the related revenue recognized, over the period in which the service is provided (typically a month). Generally, payments are received immediately through a direct charge to the customer's account.
Bankcard Revenue | Bankcard Revenue: Bankcard revenue is primarily comprised of debit card income and ATM fees. Debit card income is primarily comprised of interchange fees earned whenever the Company's debit cards are processed through card payment networks such as Mastercard. ATM fees are primarily generated when a non-Company cardholder uses a Company ATM or when a Company cardholder uses a non-Company ATM. The Company's performance obligation for bankcard revenue is generally satisfied, and the related revenue recognized, when the services are rendered. Generally, payments are received immediately or in the following month.
Trust and Management Fee Revenue | Trust and Investment Management Fee Income: Trust and investment management fee income is primarily comprised of fees earned from the management and administration of customer assets. The Company's performance obligation is generally satisfied over time (typically a quarter), and the related revenue recognized, based upon the quarter-end market value of the assets under management and the applicable fee rate. Generally, payments are received a few days after quarter-end through a direct charge to the customer's account.

X
- Definition Revenue Recognition, Fees and Commissions, Debit Cards [Policy Text Block] + References No definition available. + Details
Name: | chco_RevenueRecognitionFeesandCommissionsDebitCardsPolicyTextBlock
Namespace Prefix: | chco_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue Recognition, Fees and Commissions, Depositor Accounts [Policy Text Block] + References No definition available. + Details
Name: | chco_RevenueRecognitionFeesandCommissionsDepositorAccountsPolicyTextBlock
Namespace Prefix: | chco_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Revenue Recognition, Fees and Commissions, Fiduciary and Trust Activities [Policy Text Block] + References No definition available. + Details
Name: | chco_RevenueRecognitionFeesandCommissionsFiduciaryandTrustActivitiesPolicyTextBlock
Namespace Prefix: | chco_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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