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Capital Stock (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Jun. 30, 2013
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]        
Preferred stock total shares including Series A 10,000us-gaap_PreferredStockSharesAuthorized 10,000us-gaap_PreferredStockSharesAuthorized    
Preferred stock, par value $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare    
Preferred Stock, Shares Outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding    
Treasury Stock, Number of Shares and Restriction Disclosures [Abstract]        
Stock In Escrow For Indemnification Claims     457ahs_StockInEscrowForIndemnificationClaims  
Common Stock Released From Escrow       457ahs_CommonStockReleasedFromEscrow
Treasury Stock, Shares   204us-gaap_TreasuryStockShares   204us-gaap_TreasuryStockShares
Holdback settlement in equity from prior acquisition $ 0ahs_Holdbacksettlementinequityfromprioracquisition $ 3,046ahs_Holdbacksettlementinequityfromprioracquisition $ 0ahs_Holdbacksettlementinequityfromprioracquisition  
Common Stock Returned To Former Acquired Company's Selling Shareholders       253ahs_CommonStockReturnedToFormerAcquiredCompanysSellingShareholders