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Employee Benefit Programs (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Defined Contribution Plan Disclosure [Line Items]      
Cash surrender value $ 17,320,000amsg_DeferredCompensationArrangementWithIndividualCashSurrenderValue $ 13,313,000amsg_DeferredCompensationArrangementWithIndividualCashSurrenderValue  
AmSurg 401(k) Plan and Trust [Member]      
Defined Contribution Plan Disclosure [Line Items]      
Employer contributions 1,600,000us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_AmSurg401kPlanandTrustMember
1,100,000us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_AmSurg401kPlanandTrustMember
1,000,000us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_AmSurg401kPlanandTrustMember
Requisite service period 5 years    
401(k) as Part of Sheridan Acquisition [Member]      
Defined Contribution Plan Disclosure [Line Items]      
Requisite service period 4 years    
Plan expense 5,600,000us-gaap_DefinedContributionPlanCostRecognized
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_A401kasPartofSheridanAcquisitionMember
   
Supplemental Executive And Director Retirement Savings Plan [Member]      
Defined Contribution Plan Disclosure [Line Items]      
Employer contributions 800,000us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_SupplementalExecutiveAndDirectorRetirementSavingsPlanMember
2,300,000us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_SupplementalExecutiveAndDirectorRetirementSavingsPlanMember
1,700,000us-gaap_DeferredCompensationArrangementWithIndividualEmployerContribution
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_SupplementalExecutiveAndDirectorRetirementSavingsPlanMember
Maximum voluntary contribution as a percent of annual compensation 50.00%us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_SupplementalExecutiveAndDirectorRetirementSavingsPlanMember
   
Supplemental Executive And Director Retirement Savings Plan [Member] | Prepaid Expenses and Other Current Assets [Member]      
Defined Contribution Plan Disclosure [Line Items]      
Cash surrender value $ 17,320,000amsg_DeferredCompensationArrangementWithIndividualCashSurrenderValue
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_SupplementalExecutiveAndDirectorRetirementSavingsPlanMember
$ 13,313,000amsg_DeferredCompensationArrangementWithIndividualCashSurrenderValue
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember
/ us-gaap_DefinedContributionPlanNameAxis
= amsg_SupplementalExecutiveAndDirectorRetirementSavingsPlanMember