XML 31 R24.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Summary of Significant Accounting Policies (Details) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2015 Payment Quarter | Jun. 02, 2014
Summary of Significant Accounting Policies [Abstract] |  |
Stock dividend issued (in hundredths) |  | 10.00%ctbi_CommonStockDividendsIssued
Past due period after which loans must be well secured and in the process of collection to continue accruing interest | 90 days |
Minimum threshold period for not reclassifying loans as accruing loans | 6 months |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Number of monthly payments before loan charge off | 5 ctbi_NumberOfMonthlyPaymentsBeforeLoanChargeOff |
Current value assessment period for past due loans secured against real estate | 90 days |
Foreclosure proceedings initiated | 120 days |
Historical loan loss review period | 12 ctbi_HistoricalLoanLossReviewPeriod |
Other real estate owned [Abstract] |  |
Other real estate owned frequency of period reviews minimum | 12 months |
Other real estate owned typical frequency of period reviews maximum | 18 months |
Maximum frequency of periodic reviews of real estate owned in general | 24 months |
Unsecured Commercial Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Charge off threshold for loans considered uncollectible | 90 days |
Closed-End Consumer Loan [Member] |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Charge off threshold for loans considered uncollectible | 120 days |

X
- Definition Common stock dividends issued during the period. + References No definition available. + Details
Name: | ctbi_CommonStockDividendsIssued
Namespace Prefix: | ctbi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Refer to current value assessment period for past due loans secured against real estate. + References No definition available. + Details
Name: | ctbi_CurrentValueAssessmentPeriodForPastDueLoansSecuredAgainstRealEstate
Namespace Prefix: | ctbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to the threshold period for loans considered to be uncollectible before they are written off. + References No definition available. + Details
Name: | ctbi_FinancingReceivableThresholdPeriodForWriteoffs
Namespace Prefix: | ctbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to foreclosure proceedings initiated. + References No definition available. + Details
Name: | ctbi_ForeclosureProceedingsInitiated
Namespace Prefix: | ctbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of quarters over which historical loss rates are generally reviewed. + References No definition available. + Details
Name: | ctbi_HistoricalLoanLossReviewPeriod
Namespace Prefix: | ctbi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Loans are not reclassified as accruing until principal and interest payments remain current for a period of time. + References No definition available. + Details
Name: | ctbi_MinimumThresholdPeriodForNotReclassifyingLoansAsAccruingLoans
Namespace Prefix: | ctbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum number of payments that a closed-end loan (excluding conventional 1-4 family residential loans and installment and revolving loans secured by real estate) may be delinquent before being charged-off. If a loan is considered uncollectable, it is charged off earlier. + References No definition available. + Details
Name: | ctbi_NumberOfMonthlyPaymentsBeforeLoanChargeOff
Namespace Prefix: | ctbi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum frequency of periodic reviews for appraisals on foreclosed properties and other real estate owned generally. + References No definition available. + Details
Name: | ctbi_OtherRealEstateOwnedFrequencyOfPeriodicReviewsMaximum
Namespace Prefix: | ctbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The typical maximum frequency of periodic reviews for appraisals on foreclosed properties and other real estate owned. + References No definition available. + Details
Name: | ctbi_OtherRealEstateOwnedTypicalFrequencyOfPeriodReviewsMaximum
Namespace Prefix: | ctbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The typical minimum frequency of periodic reviews for appraisals on foreclosed properties and other real estate owned. + References No definition available. + Details
Name: | ctbi_OtherRealEstateOwnedTypicalFrequencyOfPeriodReviewsMinimum
Namespace Prefix: | ctbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Refers to the past due period after which loans must be well secured and in the process of collection to continue accruing interest. + References No definition available. + Details
Name: | ctbi_PastDuePeriodAfterWhichLoansMustBeWellSecuredAndInTheProcessOfCollectionToContinueAccruingInterest
Namespace Prefix: | ctbi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_OtherRealEstateAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ctbi_ClosedEndConsumerLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=ctbi_UnsecuredCommercialLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |