XML 42 R31.htm IDEA: XBRL DOCUMENT v2.4.1.9
Background and Basis Of Presentation Background and Basis of Presentation (Details) (City National [Member])
Mar. 31, 2015
store
Entity Location [Line Items]  
Number of Stores 82us-gaap_NumberOfStores
WEST VIRGINIA  
Entity Location [Line Items]  
Number of Stores 57us-gaap_NumberOfStores
/ dei_LegalEntityAxis
= chco_CityNationalMember
/ us-gaap_StatementGeographicalAxis
= stpr_WV
VIRGINIA  
Entity Location [Line Items]  
Number of Stores 14us-gaap_NumberOfStores
/ dei_LegalEntityAxis
= chco_CityNationalMember
/ us-gaap_StatementGeographicalAxis
= stpr_VA
KENTUCKY  
Entity Location [Line Items]  
Number of Stores 8us-gaap_NumberOfStores
/ dei_LegalEntityAxis
= chco_CityNationalMember
/ us-gaap_StatementGeographicalAxis
= stpr_KY
OHIO  
Entity Location [Line Items]  
Number of Stores 3us-gaap_NumberOfStores
/ dei_LegalEntityAxis
= chco_CityNationalMember
/ us-gaap_StatementGeographicalAxis
= stpr_OH