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Income Taxes Changes in Net Deferred Tax Liability (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Income Tax Disclosure [Abstract]      
Deferred Tax Liabilities, Net, Noncurrent $ 66,269us-gaap_DeferredTaxLiabilitiesNoncurrent $ (1,704)us-gaap_DeferredTaxLiabilitiesNoncurrent $ (17,301)us-gaap_DeferredTaxLiabilitiesNoncurrent
Deferred Income Tax Expense (Benefit) 79,154us-gaap_DeferredIncomeTaxExpenseBenefit 3,713us-gaap_DeferredIncomeTaxExpenseBenefit  
Deferred Tax Liability, Business Acquisition Deferred Tax Liability Assumed (909)cia_DeferredTaxLiabilityBusinessAcquisitionDeferredTaxLiabilityAssumed 0cia_DeferredTaxLiabilityBusinessAcquisitionDeferredTaxLiabilityAssumed  
Available-for-sale Securities, Income Tax Expense on Change in Unrealized Holding Gain (Loss) (10,382)us-gaap_AvailableForSaleSecuritiesIncomeTaxExpenseOnChangeInUnrealizedHoldingGainOrLoss 12,282us-gaap_AvailableForSaleSecuritiesIncomeTaxExpenseOnChangeInUnrealizedHoldingGainOrLoss  
Deferred Tax from Change in Unrealized Gain Loss Atributible to Deferred Acquisition Costs and Value of Business Acquired $ 110cia_DeferredTaxFromChangeInUnrealizedGainLossAtributibleToDeferredAcquisitionCostsAndValueOfBusinessAcquired $ (398)cia_DeferredTaxFromChangeInUnrealizedGainLossAtributibleToDeferredAcquisitionCostsAndValueOfBusinessAcquired