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Income Taxes - Reconciliation of income tax expense at the statutory rate to actual income tax expense (Details 1) (USD $)
3 Months Ended 12 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Income Tax Disclosure [Abstract]                    
Computed at the statutory rate (34%)                 $ 1,328,312us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate $ 1,496,661us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Increase (decrease) resulting from                    
Tax exempt interest                 (503,089)us-gaap_IncomeTaxReconciliationTaxExemptIncome (509,850)us-gaap_IncomeTaxReconciliationTaxExemptIncome
State income taxes, net                 173,879us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes 264,287us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes
Increase in cash surrender value                 (63,235)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance (66,246)us-gaap_IncomeTaxReconciliationNondeductibleExpenseLifeInsurance
Other                 (1,821)us-gaap_IncomeTaxReconciliationOtherAdjustments 3,447us-gaap_IncomeTaxReconciliationOtherAdjustments
Actual tax expense $ 183,641us-gaap_IncomeTaxExpenseBenefit $ 260,619us-gaap_IncomeTaxExpenseBenefit $ 176,277us-gaap_IncomeTaxExpenseBenefit $ 313,509us-gaap_IncomeTaxExpenseBenefit $ 207,234us-gaap_IncomeTaxExpenseBenefit $ 271,739us-gaap_IncomeTaxExpenseBenefit $ 270,539us-gaap_IncomeTaxExpenseBenefit $ 438,787us-gaap_IncomeTaxExpenseBenefit $ 934,046us-gaap_IncomeTaxExpenseBenefit $ 1,188,299us-gaap_IncomeTaxExpenseBenefit
Tax expense as a percentage of pre-tax income                 23.91%us-gaap_EffectiveIncomeTaxRateContinuingOperations 26.99%us-gaap_EffectiveIncomeTaxRateContinuingOperations