XML 50 R38.htm IDEA: XBRL DOCUMENT
v3.20.2

Loans (Details) $ in Thousands | 9 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2021 USD ($) | Sep. 30, 2020 USD ($) contract | Jan. 01, 2020 USD ($) | Dec. 31, 2019 USD ($)
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans |  | $ 3,663,966 | $ 3,618,825 | $ 3,616,099
Commercial and industrial |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans |  | 383,980 |  | $ 308,015
Small Business Administration Paycheck Protection Program | Commercial and industrial |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Gross loans |  | $ 90,000 |  |
Financing Receivable, Number of Contracts | contract |  | 1,500 |  |
Small Business Administration Paycheck Protection Program | Commercial and industrial | Forecast |  |  |  |
Loans and Leases Receivable Disclosure [Line Items] |  |  |  |
Interest and Fee Income, Other Loans | $ 3,000 |  |  |

X
- Definition Financing Receivable, Number of Contracts + References No definition available. + Details
Name: | chco_FinancingReceivableNumberOfContracts
Namespace Prefix: | chco_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of interest and fee income from loans classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.1) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_InterestAndFeeIncomeOtherLoans
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LoansAndLeasesReceivableDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, before allowance for credit loss, of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 80 -URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448 + Details
Name: | us-gaap_NotesReceivableGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ClassOfFinancingReceivableTypeOfBorrowerAxis=chco_SmallBusinessAdministrationPaycheckProtectionProgramMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |