XML 83 R75.htm IDEA: XBRL DOCUMENT v2.4.1.9
INCOME TAXES (Details 2)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Reconciliation of effective tax rates and federal statutory rates applied to financial statement income      
U. S. federal income tax rate (as a percent) 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Changes from the statutory rate      
Tax-exempt interest income (as a percent) 14.70%us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome 16.80%us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome 13.80%us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome
Historic and low income tax credits (as a percent) 7.00%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits 5.40%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits 2.10%us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits
Insurance captive (1.80%)ktyb_EffectiveIncomeTaxRateReconciliationInsuranceCaptive    
Non-deductible interest expense related to carrying tax-exempt investments (as a percent) 0.40%ktyb_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestExpense 0.50%ktyb_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestExpense 0.40%ktyb_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseInterestExpense
Other (as a percent) 0.40%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.60%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments 0.50%us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective tax rates (as a percent) 11.30%us-gaap_EffectiveIncomeTaxRateContinuingOperations 12.90%us-gaap_EffectiveIncomeTaxRateContinuingOperations 19.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations