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Income Taxes (Details) (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
Dec. 31, 2012
Income Tax Disclosure [Abstract]                      
Federal income tax expense $ 1,921,000us-gaap_IncomeTaxExpenseBenefit $ 952,000us-gaap_IncomeTaxExpenseBenefit $ 358,000us-gaap_IncomeTaxExpenseBenefit $ 494,000us-gaap_IncomeTaxExpenseBenefit $ 604,000us-gaap_IncomeTaxExpenseBenefit $ 794,000us-gaap_IncomeTaxExpenseBenefit $ 488,000us-gaap_IncomeTaxExpenseBenefit $ 252,000us-gaap_IncomeTaxExpenseBenefit $ 3,725,000us-gaap_IncomeTaxExpenseBenefit $ 2,138,000us-gaap_IncomeTaxExpenseBenefit $ 1,507,000us-gaap_IncomeTaxExpenseBenefit
Effective Income Tax Rate                 (134.00%)us-gaap_EffectiveIncomeTaxRateContinuingOperations 30.80%us-gaap_EffectiveIncomeTaxRateContinuingOperations 25.00%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Tax Benefit not Recognized due to Non-Deductibility of IRC Section 7702 Toll Charge                 3,514,000cia_TaxBenefitnotRecognizedduetoNonDeductibilityofIRCSection7702TollCharge 0cia_TaxBenefitnotRecognizedduetoNonDeductibilityofIRCSection7702TollCharge 0cia_TaxBenefitnotRecognizedduetoNonDeductibilityofIRCSection7702TollCharge
Non Deductible IRC Section 7702 Toll Charge                 10,000,000.0cia_NonDeductibleIRCSection7702TollCharge    
Release of Tax Valuation Allowance in Other Comprehensive Income                 21,000cia_ReleaseOfTaxValuationAllowanceInOtherComprehensiveIncome 20,000cia_ReleaseOfTaxValuationAllowanceInOtherComprehensiveIncome 188,000cia_ReleaseOfTaxValuationAllowanceInOtherComprehensiveIncome
Federal Statutory Income Tax Rate                 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Operating Loss Carryforwards 47,000us-gaap_OperatingLossCarryforwards               47,000us-gaap_OperatingLossCarryforwards    
Amount in Policyholders' Surplus Account 3,291,000cia_AmountInPolicyholdersSurplusAccount               3,291,000cia_AmountInPolicyholdersSurplusAccount    
Tax on Policyholders Surplus Account $ 1,152,000cia_TaxOnPolicyholdersSurplusAccount               $ 1,152,000cia_TaxOnPolicyholdersSurplusAccount