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v2.4.1.9

Summary Of Significant Accounting And Reporting Policies (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Mar. 31, 2014
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Other Real Estate, Foreclosed Assets, and Repossessed Assets | $ 8.2 us-gaap_OtherRealEstateAndForeclosedAssets | $ 8.5 us-gaap_OtherRealEstateAndForeclosedAssets |  |
Amount of tax benefit that is greater than | 50.00%chco_UncertainTaxPositionInitiallyRecognizedAtTaxBenefitMinimumThreshold |  |  |
Investments in affordable housing limited partnerships | 0.9 chco_InvestmentInAffordableHousingLimitedPartnerships | 1.3 chco_InvestmentInAffordableHousingLimitedPartnerships |  |
Cash paid for interest | 12.1 us-gaap_InterestPaid | 13.4 us-gaap_InterestPaid | 14.9 us-gaap_InterestPaid |
Income taxes paid | 23.0 us-gaap_IncomeTaxesPaid | 16.6 us-gaap_IncomeTaxesPaid | 14.7 us-gaap_IncomeTaxesPaid |
Held-to-maturity Securities, Transferred Security, at Carrying Value |  |  |  | $ 83.4 us-gaap_HeldToMaturitySecuritiesTransferredSecurityAtCarryingValue
City National |  |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |  |
Number of offices | 82 us-gaap_NumberOfStores / dei_LegalEntityAxis = chco_CityNationalMember |  |  |

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- Definition Uncertain Tax Position Initially Recognized At Tax Benefit Minimum Threshold + References No definition available. + Details
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- Details
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- Definition For any transfer of securities categorized as held-to-maturity, this item represents the net carrying amount of the transferred security to another category of investments in debt and equity securities (trading or available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27405-111563 + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The amount of cash paid for interest during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition Represents the number of stores. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.10(4)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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