XML 122 R98.htm IDEA: XBRL DOCUMENT v2.4.1.9
Losses and Loss Expenses - Components of Loss Reserves (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Liability for Claims and Claims Adjustment Expense [Abstract]        
Reserve for reported losses and loss expenses $ 7,461,444us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount $ 8,149,501us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseReportedClaimsAmount    
Reserve for losses incurred but not reported 11,891,799us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount 12,331,564us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredButNotReportedIBNRClaimsAmount    
Unpaid losses and loss expenses at end of year $ 19,353,243us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense $ 20,481,065us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense $ 20,484,121us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense $ 20,613,901us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense