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General (Details) (USD $)
In Thousands, unless otherwise specified
 0 Months Ended
May 01, 2014
Dec. 31, 2014
Business Acquisition [Line Items]    
Stockholders' Equity Note, Stock Split, Conversion Ratio 3us-gaap_StockholdersEquityNoteStockSplitConversionRatio1  
Hong Kong And Singapore Operations Of Royal Sun Alliance Insurance Plc    
Business Acquisition [Line Items]    
Business Acquisition Preliminary Purchase Price   $ 201,761awh_BusinessAcquisitionPreliminaryPurchasePrice
/ us-gaap_BusinessAcquisitionAxis
= awh_HongKongAndSingaporeOperationsOfRoyalSunAllianceInsurancePlcMember
Business Acquisition Expected Additional Capitalization   $ 90,000awh_BusinessAcquisitionExpectedAdditionalCapitalization
/ us-gaap_BusinessAcquisitionAxis
= awh_HongKongAndSingaporeOperationsOfRoyalSunAllianceInsurancePlcMember