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
Balance Type:	credit
Period Type:	instant

- Definition

Historical collection rate from Medicare.

+ References

No definition available.

+ Details

Name:	amed_HistoricalCollectionRateFromMedicare
Namespace Prefix:	amed_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description containing the percentage of the entity's Hospice net Medicare service revenue that is derived from routine care.

+ References

No definition available.

+ Details

Name:	amed_HospiceMedicareRevenueRateAccountedForRoutineCare
Namespace Prefix:	amed_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description containing the visit threshold for a low utilization payment adjustment.

+ References

No definition available.

+ Details

Name:	amed_LowUtilizationPaymentAdjustmentNumberOfVisits
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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	amed_NetServiceRevenueEpisodePaymentRateDuration
Namespace Prefix:	amed_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

Name:	amed_NetServiceRevenuePeriodOfCarePaymentRateDuration
Namespace Prefix:	amed_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Non-Medicare Revenue Term Rates as a percentage of Medicare Term Rates

+ References

No definition available.

+ Details

Name:	amed_NonMedicareRevenueTermRates
Namespace Prefix:	amed_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage at which total reimbursement is capped if cost of care is unusually costly.

+ References

No definition available.

+ Details

Name:	amed_PercentageOfTotalReimbursementOfOutlierPayment
Namespace Prefix:	amed_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description containing the percentage of estimated payment that is requested at the start of care for an initial period of care.

+ References

No definition available.

+ Details

Name:	amed_RateOfRequestForAnticipatedPaymentSubmittedForInitialPeriodOfCare
Namespace Prefix:	amed_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

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Balance Type:	na
Period Type:	duration

- Definition

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.

+ References

No definition available.

+ Details

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- Details

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Balance Type:
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- Details

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($) Number_of_Visits	Dec. 31, 2019 USD ($)	Dec. 31, 2018
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net service revenue episode payment rate	60 days
Percentage of total reimbursement of outlier payment	10.00%
Historical collection rate from Medicare	99.00%
Hospice Medicare revenue rate accounted for routine care	97.00%	97.00%	97.00%
Rate of request for anticipated payment submitted for the initial period of care	20.00%
Net Service Revenue Period Of Care Payment Rate Duration	30 days
Revenue from Contract with Customer Benchmark [Member] \| Medicare Revenue [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Percent of net services revenue provided by Medicare	75.00%	74.00%	73.00%
Home Health [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Historical collection rate from Medicare	99.00%
Hospice [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Historical collection rate from Medicare	99.00%
Minimum [Member] \| Home Health [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Low utilization payment adjustment, maximum number of visits \| Number_of_Visits	2
Non-medicare revenue term rates	90.00%
Maximum [Member] \| Home Health [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Low utilization payment adjustment, maximum number of visits \| Number_of_Visits	6
Non-medicare revenue term rates	100.00%
Cap Year 2014 Through 2021 [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Estimated amounts due back to Medicare	$ 9.3
Cap Year 2014 Through 2021 [Member] \| AseraCare Hospice [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Estimated amounts due back to Medicare	$ 2.0
Cap Year 2013 Through 2020 [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Estimated amounts due back to Medicare		$ 5.7