Annual report pursuant to Section 13 and 15(d)

INCOME TAXES (The Federal Income Tax Statutory Rates To Income Before Income Taxes) (Detail)

v2.4.1.9
INCOME TAXES (The Federal Income Tax Statutory Rates To Income Before Income Taxes) (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income tax at statutory federal rate, amount $ 25,892us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ 21,691us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ 18,047us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Income tax at statutory federal rate, Pre-tax Earnings 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
State income tax, net of federal tax effect, amount (358)us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes 462us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes 732us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
State income tax, net of federal tax effect, Pre-tax Earnings (0.49%)us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 0.75%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes 1.42%us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes
Tax-exempt income, net of expenses, amount (1,316)us-gaap_IncomeTaxReconciliationTaxExemptIncome (1,200)us-gaap_IncomeTaxReconciliationTaxExemptIncome (1,007)us-gaap_IncomeTaxReconciliationTaxExemptIncome
Tax-exempt income, net of expenses, Pre-tax Earnings (1.78%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome (1.94%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome (1.95%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxExemptIncome
Bank owned life insurance contracts, amount (798)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance (698)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance (568)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance
Bank owned life insurance contracts, Pre-tax Earnings (1.08%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance (1.13%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance (1.10%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseLifeInsurance
Incentive stock option expense, amount (18)us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost 66us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost 121us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
Incentive stock option expense, Pre-tax Earnings (0.02%)us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost 0.11%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost 0.23%us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost
Federal tax credits, amount (1,659)us-gaap_IncomeTaxReconciliationTaxCredits    
Federal tax credits, Pre-tax Earnings (2.24%)us-gaap_EffectiveIncomeTaxRateReconciliationTaxCredits    
Other, amount (142)us-gaap_IncomeTaxReconciliationOtherReconcilingItems (37)us-gaap_IncomeTaxReconciliationOtherReconcilingItems (206)us-gaap_IncomeTaxReconciliationOtherReconcilingItems
Other, Pre-tax Earnings (0.19%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.06%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments (0.40%)us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments
Effective income tax and rate, amount $ 21,601us-gaap_IncomeTaxExpenseBenefit $ 20,358us-gaap_IncomeTaxExpenseBenefit $ 17,120us-gaap_IncomeTaxExpenseBenefit
Effective income tax and rate, Pre-tax Earnings 29.20%us-gaap_EffectiveIncomeTaxRateContinuingOperations 32.85%us-gaap_EffectiveIncomeTaxRateContinuingOperations 33.20%us-gaap_EffectiveIncomeTaxRateContinuingOperations