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Acquisitions (Narrative) (Details) (USD $) | 12 Months Ended | 0 Months Ended |
--- | --- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 | Jan. 10, 2013 | Dec. 31, 2011
Business Acquisition [Line Items] |  |  |  |  |
Total Assets | $ 3,461,633,000 us-gaap_Assets | $ 3,368,238,000 us-gaap_Assets |  |  |
Deposits | 2,872,787,000 us-gaap_Deposits | 2,785,133,000 us-gaap_Deposits |  |  |
Shareholders’ Equity | 390,853,000 us-gaap_StockholdersEquity | 387,623,000 us-gaap_StockholdersEquity | 333,274,000 us-gaap_StockholdersEquity |  | 311,134,000 us-gaap_StockholdersEquity
Professional fees | 2,049,000 us-gaap_ProfessionalFees | 3,028,000 us-gaap_ProfessionalFees | 1,786,000 us-gaap_ProfessionalFees |  |
Virginia Savings Bank [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Merger-related costs |  | 4,700,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts / us-gaap_BusinessAcquisitionAxis = chco_VirginiaSavingsBankMember |  |  |
Severance costs |  | 900,000 us-gaap_SeveranceCosts1 / us-gaap_BusinessAcquisitionAxis = chco_VirginiaSavingsBankMember |  |  |
Professional fees |  | 1,200,000 us-gaap_ProfessionalFees / us-gaap_BusinessAcquisitionAxis = chco_VirginiaSavingsBankMember |  |  |
Data processing costs |  | 2,400,000 us-gaap_InformationTechnologyAndDataProcessing / us-gaap_BusinessAcquisitionAxis = chco_VirginiaSavingsBankMember |  |  |
Community Bank [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Percent of outstanding common and preferred stock |  |  |  | 100.00%chco_PercentOfOutstandingCommonAndPreferredStockAcquiredDuringAcquisition / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Total Assets |  |  |  | 460,000,000 us-gaap_Assets / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Loans |  |  |  | 410,000,000 us-gaap_LoansPayable / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Deposits |  |  |  | 380,000,000 us-gaap_Deposits / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Shareholders’ Equity |  |  |  | 53,000,000 us-gaap_StockholdersEquity / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Number of City Holding Company common shares recieved per share of Community Financial Corporation stock |  |  |  | $ 0.1753 chco_ShareExchangeRatioSharesReceivedinExchangeforSharesHeld / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Number of common stock shares acquired |  |  |  | 767,000 chco_BusinessAcquisitionsNumberOfSharesAcquired / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Common stock value |  |  |  | 27,783,000 us-gaap_BusinessCombinationConsiderationTransferredEquityInterestsIssuedAndIssuable / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Closing price of common stock at acquisition |  |  |  | $ 36.23 us-gaap_BusinessAcquisitionSharePrice / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Cash |  |  |  | 12,738,000 us-gaap_PaymentsToAcquireBusinessesGross / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Premium on time deposits |  |  |  | 1,100,000 chco_PremiumOnTimeDeposits / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Premium on time deposits amortization period | 5 years |  |  |  |
Core deposit intangible |  |  |  | 2,700,000 us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |
Amortization time period for core deposit intangible assets | 10 years |  |  |  |
Merger-related costs | 5,500,000 us-gaap_BusinessCombinationAcquisitionRelatedCosts / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |  |  |  |
Severance costs | 2,500,000 us-gaap_SeveranceCosts1 / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |  |  |  |
Professional fees | 1,400,000 us-gaap_ProfessionalFees / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |  |  |  |
Data processing costs | $ 1,100,000 us-gaap_InformationTechnologyAndDataProcessing / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember |  |  |  |
Virginia Beach, Virginia [Member] | Community Bank [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of branches acquired |  |  |  | 2 chco_NumberOfBranchesAcquiredInAcquisition / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember / invest_InvestmentGeographicRegionAxis = chco_VirginiaBeachVirginiaMember |
Western Virginia [Member] | Community Bank [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Number of branches acquired |  |  |  | 8 chco_NumberOfBranchesAcquiredInAcquisition / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember / invest_InvestmentGeographicRegionAxis = chco_WesternVirginiaMember |
Warrant [Member] | Community Bank [Member] |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Closing price of common stock at acquisition |  |  |  | $ 30.80 us-gaap_BusinessAcquisitionSharePrice / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Number of shares to purchase through warrant |  |  |  | 61,565 us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights / us-gaap_BusinessAcquisitionAxis = chco_CommunityFinancialCorporationMember / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |
Original warrant expiration period |  |  |  | 10 years |
Revised warrant expiration period |  |  |  | 6 years |

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