XML 40 R81.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Previously Securitized Loans (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2013 transaction | Dec. 31, 2012 | Dec. 31, 2011
Previously Securitized Loans [Abstract] |  |  |
Number of securitization transactions | 6 |  |
Proceeds from securitization transactions | $ 760,000,000 |  |
Fixed rate of junior-lien underlying mortgages | 125.00% |  |
Carrying value remaining | 0 |  |
Outstanding balance of securitized loans | 6,200,000 |  |
Recognized interest income from previously securitized loans | $ 2,500,000 | $ 3,300,000 | $ 3,100,000

X
- Definition CarryingValueOutstandingonLoansSecuritized + References No definition available. + Details
Name: | chco_CarryingValueOutstandingonLoansSecuritized
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Collateralization Percentage Of Mortgages Underlying Securitization Transaction + References No definition available. + Details
Name: | chco_CollateralizationPercentageOfMortgagesUnderlyingSecuritizationTransaction
Namespace Prefix: | chco_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition ContractualValueOutstandingLoansSecuritized + References No definition available. + Details
Name: | chco_ContractualValueOutstandingLoansSecuritized
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number Of Loans Securitization Transactions Junior Lien Underlying Mortgages + References No definition available. + Details
Name: | chco_NumberOfLoansSecuritizationTransactionsJuniorLienUnderlyingMortgages
Namespace Prefix: | chco_
Data Type: | xbrli:positiveIntegerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | chco_PreviouslySecuritizedLoansAbstract
Namespace Prefix: | chco_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Proceeds From Securitization Of Mortgages + References No definition available. + Details
Name: | chco_ProceedsFromSecuritizationOfMortgages
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Recognized interest income from previously securitized loans. + References No definition available. + Details
Name: | chco_RecognizedInterestIncomeFromPreviouslySecuritizedLoans
Namespace Prefix: | chco_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration