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General (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Potentially dilutive securities (in shares) 2,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 48,000us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
Deferred policy acquisition cost amortization $ 133,847us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense $ 129,814us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense
Advertising expenses $ 15,955us-gaap_AdvertisingExpense $ 6,381us-gaap_AdvertisingExpense