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
Namespace Prefix:	amed_
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:	dtr-types: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:	dtr-types: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
Namespace Prefix:	amed_
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:	dtr-types: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:	dtr-types: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:	dtr-types: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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e9054-108599

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13531-108611

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 21
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123594938&loc=d3e13537-108611

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-SubTopic 10
-Section 50
-Paragraph 20
-URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592

+ Details

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
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

Name:	us-gaap_RevenueRecognitionMultipleDeliverableArrangementsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_ProductConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=amed_MedicareRevenueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=amed_HomeHealthMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=amed_HospiceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=amed_HighAcuityCareMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	amed_CapYearAxis=amed_CapYearTwoThousandSixteenThroughTwoThousandTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	amed_CapYearAxis=amed_CapYearTwoThousandFourteenThroughTwoThousandTwentyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Revenue Recognition Narrative (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) Number_of_Visits	Dec. 31, 2020 USD ($)	Dec. 31, 2019
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 Benchmark [Member] \| Product Concentration Risk [Member] \| Medicare Revenue [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Percent of net services revenue provided by Medicare	75.00%	75.00%	74.00%
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	95.00%
Minimum [Member] \| High Acuity Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net service revenue episode payment rate	30 days
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%
Maximum [Member] \| High Acuity Care [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Net service revenue episode payment rate	60 days
Cap Year 2016 Through 2022 [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Estimated amounts due back to Medicare \| $	$ 4.5
Cap Year 2014 Through 2021 [Member]
Revenue Recognition, Multiple-deliverable Arrangements [Line Items]
Estimated amounts due back to Medicare \| $		$ 9.3