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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 52 -Paragraph 30 false 32 Total expenses 10 us-gaap_BenefitsLossesAndExpenses us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 247816000 247816 false false false 2 false true false false 240907000 240907 false false false 3 false true false false 901443000 901443 false false false 4 false true false false 781785000 781785 false false false xbrli:monetaryItemType monetary The total amount of expense recognized during the period for future policy benefits, claims and claims adjustment costs, and for selling, general and administrative costs. 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This amount is the portion attributable to the parent. No authoritative reference available. false 39 Reclassification adjustment for net realized investment gains included in net income, net of applicable income tax 11 us-gaap_OtherComprehensiveIncomeReclassificationAdjustmentForWriteDownOfSecuritiesIncludedInNetIncomeNetOfTax us-gaap true debit duration No definition available. false false false false false false false false false false true negated false 1 false true false false -32550000 -32550 false false false 2 false true false false -16542000 -16542 false false false 3 false true false false -145476000 -145476 false false false 4 false true false false -2055000 -2055 false false false xbrli:monetaryItemType monetary Reclassification adjustment for unrealized gains or losses realized upon the write-down of securities, after tax. 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It includes all changes in equity during a period except those resulting from investments by owners and distributions to owners, including any and all transactions which are directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A5 -Appendix A Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a false 41 COMPREHENSIVE INCOME 11 awh_ComprehensiveIncomeLoss awh false credit duration COMPREHENSIVE INCOME false false false false false false false false false false false totallabel false 1 true true false false 269924000 269924 false false false 2 true true false false 336927000 336927 false false false 3 true true false false 576019000 576019 false false false 4 true true false false 661891000 661891 false false false xbrli:monetaryItemType monetary COMPREHENSIVE INCOME No authoritative reference available. true 42 PER SHARE DATA 11 us-gaap_EarningsPerShareAbstract us-gaap true na duration No definition available. false false false false false true false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string No definition available. false 43 Basic earnings per share 12 us-gaap_EarningsPerShareBasic us-gaap true na duration No definition available. false false false false false false false false false false false label true 1 true true false false 5.59 5.59 false false false 2 true true false false 4.05 4.05 false false false 3 true true false false 11.78 11.78 false false false 4 true true false false 9.01 9.01 false false false us-types:perShareItemType decimal The amount of net income or loss for the period per each share of common stock outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 21 -Article 9 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 36, 37, 38 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 20 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 18 -Article 7 false 44 Diluted earnings per share 12 us-gaap_EarningsPerShareDiluted us-gaap true na duration No definition available. false false false false false false false false false false false label true 1 true true false false 5.21 5.21 false false false 2 true true false false 3.83 3.83 false false false 3 true true false false 11.03 11.03 false false false 4 true true false false 8.62 8.62 false false false us-types:perShareItemType decimal The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 171 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 false 46 Weighted average common shares and common share equivalents outstanding 12 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding us-gaap true na duration No definition available. false false false false false false false false false false false false 1 false true false false 48839991 48839991 false false false 2 false true false false 52345913 52345913 false false false 3 false true false false 51887390 51887390 false false false 4 false true false false 51676006 51676006 false false false xbrli:sharesItemType shares The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period. 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