XML 78 R62.htm IDEA: XBRL DOCUMENT
v3.22.0.1

Allowance For Loan Losses (Narrative) (Details) | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) contract | Dec. 31, 2020 USD ($) contract | Dec. 31, 2019 USD ($) contract
Receivables [Abstract] |  |  |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $ 2,100,000 | $ 3,000,000 |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 0 |  |
Loan Review Selection Threshold ($) | 1,000,000 | 1,000,000 | $ 1,000,000
Impaired Financing Receivable, Interest Income, Accrual Method | 100,000 | 100,000 | 100,000
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loan Review Selection Threshold ($) | 1,000,000 | 1,000,000 | $ 1,000,000
Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses | $ 300,000 | $ 1,600,000 |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Number of Contracts | contract | 1 | 0 | 1
Financing Receivable, Troubled Debt Restructuring, Subsequent Default | $ 2,100,000 | $ 3,000,000 |
Total Troubled Debt Restructurings | 21,280,000 | 26,142,000 |
Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Charge-Off |  |  | $ 700,000
Impaired Financing Receivable, Interest Income, Accrual Method | 100,000 | 100,000 | 100,000
Financing Receivables, Impaired, Troubled Debt Restructuring, Provision for Credit Losses | 100,000 | $ 100,000 | $ 100,000
Payment Deferral | COVID-19 | Consumer Borrower |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loan Restructuring, Trial Modifications, Amount | 144,000,000 |  |
Loan Restructuring, Trial Modifications, Period End Amount | 2,000,000 |  |
Loan Restructuring, Trial Modifications, Resumed Payment, Amount | 142,000,000 |  |
Total Troubled Debt Restructurings | 4,000,000 |  |
Payment Deferral | COVID-19 | Commercial Borrower |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |
Loan Restructuring, Trial Modifications, Amount | 479,000,000 |  |
Loan Restructuring, Trial Modifications, Period End Amount | $ 0 |  |

X
- Definition Financing Receivable, Troubled Debt Restructuring, Allowance for Credit Losses + References No definition available. + Details
Name: | chco_FinancingReceivableTroubledDebtRestructuringAllowanceForCreditLosses
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Financing Receivable, Troubled Debt Restructuring, Subsequent Default, Charge-Off + References No definition available. + Details
Name: | chco_FinancingReceivableTroubledDebtRestructuringSubsequentDefaultChargeOff
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Financing Receivables, Impaired, Troubled Debt Restructuring, Provision for Credit Losses + References No definition available. + Details
Name: | chco_FinancingReceivablesImpairedTroubledDebtRestructuringProvisionForCreditLosses
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loan Restructuring, Trial Modifications, Period End Amount + References No definition available. + Details
Name: | chco_LoanRestructuringTrialModificationsPeriodEndAmount
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Loan Restructuring, Trial Modifications, Resumed Payment, Amount + References No definition available. + Details
Name: | chco_LoanRestructuringTrialModificationsResumedPaymentAmount
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Loan Review Selection Threshold ($) + References No definition available. + Details
Name: | chco_LoanReviewSelectionThreshold
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18845-111554 + Details
Name: | us-gaap_FinancingReceivableModificationsRecordedInvestment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of financing receivable contracts modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of financing receivable modified as troubled debt restructuring within previous 12 months, with subsequent payment default. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 34 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953682-111524 + Details
Name: | us-gaap_FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of interest income recognized that the financing receivables (with related allowance for credit losses and without a related allowance for credit losses) were impaired. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5212-111524 + Details
Name: | us-gaap_ImpairedFinancingReceivableInterestIncomeAccrualMethod
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of financing receivable modified on trial basis. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953676-111524 + Details
Name: | us-gaap_LoanRestructuringTrialModificationsAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554 + Details
Name: | us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- Details
Name: | us-gaap_LoanRestructuringModificationAxis=us-gaap_PaymentDeferralMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LoanRestructuringModificationNameAxis=chco_COVID19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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