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Estimate of obligations due Medicare upon demand due to overages for the inpatient cap and/or overall payment cap.

No definition available.

Name:	amed_EstimatedAmountDueBackToMedicareInOtherAccruedLiabilities
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Data Type:	xbrli:monetaryItemType
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Historical collection rate from Medicare.

No definition available.

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Data Type:	dtr-types:percentItemType
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Description containing the percentage of the entity's Hospice net Medicare service revenue that is derived from routine care.

No definition available.

Name:	amed_HospiceMedicareRevenueRateAccountedForRoutineCare
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Data Type:	dtr-types:percentItemType
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Description containing the visit threshold for a low utilization payment adjustment.

No definition available.

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Data Type:	xbrli:integerItemType
Balance Type:	na
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Description containing the number of days from the date the request for anticipated payment was received in which the final bill must be submitted to Medicare.

No definition available.

Name:	amed_NetServiceRevenueEpisodePaymentRateDuration
Namespace Prefix:	amed_
Data Type:	xbrli:durationItemType
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Description containing the number of days from the date the request for anticipated payment was received in which the final bill must be submitted to Medicare.

No definition available.

Name:	amed_NetServiceRevenuePeriodOfCarePaymentRateDuration
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Data Type:	xbrli:durationItemType
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Non-Medicare Revenue Term Rates as a percentage of Medicare Term Rates

No definition available.

Name:	amed_NonMedicareRevenueTermRates
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Data Type:	dtr-types:percentItemType
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Percentage at which total reimbursement is capped if cost of care is unusually costly.

No definition available.

Name:	amed_PercentageOfTotalReimbursementOfOutlierPayment
Namespace Prefix:	amed_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

Name:	us-gaap_RevenueRecognitionMultipleDeliverableArrangementsLineItems
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Data Type:	xbrli:stringItemType
Balance Type:	na
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Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_StatementBusinessSegmentsAxis=amed_HospiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_StatementBusinessSegmentsAxis=amed_HighAcuityCareMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	amed_CapYearAxis=amed_CapYearTwoThousandSixteenThroughTwoThousandTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_ProductConcentrationRiskMember
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Balance Type:
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