Ratio of adjusted earnings before interest, taxes, depreciation and amortization to cash interest charges

No definition available.

Name:	amed_ConsolidatedInterestCoverageRatio
Namespace Prefix:	amed_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Interest Additional Interest Above Eurodollar Rate

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument Interest Additional Interest Above Federal Fund Rate

+ References

No definition available.

+ Details

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

- Definition

Debt Instrument Interest Rate at Period End

+ References

No definition available.

+ Details

Name:	amed_DebtInstrumentInterestRateatPeriodEnd
Namespace Prefix:	amed_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The percentage of the Term Loan that is required as periodic payments including both interest and principal payments

+ References

No definition available.

+ Details

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

- Definition

Percentage of adjusted EBITDA that guarantor subsidiaries represent

+ References

No definition available.

+ Details

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

- Definition

Percentage of consolidated net revenues and adjusted EBITDA that guarantor wholly-owned subsidiaries represent

+ References

No definition available.

+ Details

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

- Definition

Proceeds Received From Loan Party Of Subsidiary

+ References

No definition available.

+ Details

Name:	amed_ProceedsReceivedFromLoanPartyOfSubsidiary
Namespace Prefix:	amed_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Ratio of debt to earnings before interest, taxes, depreciation and amortization.

+ References

No definition available.

+ Details

Name:	amed_TotalLeverageRatio
Namespace Prefix:	amed_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_DebtInstrumentCarryingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Weighted average interest rate of long-term debt outstanding calculated over time.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermDebtWeightedAverageInterestRateOverTime
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsOfDebtIssuanceCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LoansPayableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=amed_FourHundredFiftyMillionTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=amed_FiveHundredFiftyMillionRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=amed_AmendedCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=amed_OneHundredSeventyFiveMillionTermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=amed_SecondAmendmentToAmendedCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_BaseRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=amed_SecondAmendmentToAmendedCreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_EurodollarMember
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_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

LONG-TERM OBLIGATIONS - Narrative (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		26 Months Ended	34 Months Ended	60 Months Ended
	Jul. 30, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2023	Jul. 30, 2026	Jul. 30, 2026	Dec. 31, 2020	Feb. 04, 2019
Debt Instrument [Line Items]
Consolidated leverage ratio		1.2		1.2
Consolidated interest coverage ratio		27.5		27.5
Principal amount		$ 452,800		$ 452,800					$ 217,700
Payments of Debt Issuance Costs				2,792	$ 0
Term Loan [Member] \| Four Hundred Fifty Million Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, face amount		$ 450,000		$ 450,000
Weighted average interest rate (percent)		1.60%	1.70%	1.50%	2.30%
Maturity Date				Jul. 30, 2026
Principal amount		$ 450,000		$ 450,000					164,100
Revolving Credit Facility [Member] \| Five Hundred Fifty Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount		$ 550,000		$ 550,000
Weighted average interest rate (percent)		2.90%	1.80%	1.90%	2.20%
Maturity Date				Jul. 30, 2026
Remaining availability under revolving credit facility		$ 519,900		$ 519,900
Principal amount		0		0					$ 51,000
Line of Credit [Member] \| Five Hundred Fifty Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Outstanding letters of credit		30,100		$ 30,100
Amended Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity										$ 725,000
Amended Credit Agreement [Member] \| Five Hundred Fifty Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount										550,000
Amended Credit Agreement [Member] \| One Hundred Seventy Five Million Term Loan Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount										$ 175,000
Second Amended Credit Agreement
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity	$ 1,000,000
Additional interest rate above Federal Fund rate	0.50%
Additional interest rate above Eurodollar rate	1.00%
Percentage of consolidated revenue and adjusted EBITDA that guarantor wholly-owned subsidiaries represent	95.00%
Percentage of adjusted EBITDA that guarantor subsidiaries represent	70.00%
Payments of Debt Issuance Costs		$ 2,800
Second Amended Credit Agreement \| Five Hundred Fifty Million Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	$ 550,000
Second Amended Credit Agreement \| Four Hundred Fifty Million Term Loan Facility
Debt Instrument [Line Items]
Debt instrument, face amount	$ 450,000
Base Rate [Member] \| Second Amended Credit Agreement
Debt Instrument [Line Items]
Description of variable rate basis	Fluctuating rate per annum equal to the highest of (a) the federal funds rate plus 0.50% per annum, (b) the prime rate of interest established by the Administrative Agent, and (c) the Eurodollar Rate for an interest period of one month plus 1% per annum.
Base Rate [Member] \| Second Amended Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate				0.50%
Eurodollar [Member] \| Second Amended Credit Agreement
Debt Instrument [Line Items]
Description of variable rate basis	Rate at which Eurodollar deposits in the London interbank market for an interest period of one, two, three or six months
Eurodollar [Member] \| Term Loan [Member] \| Four Hundred Fifty Million Term Loan Facility
Debt Instrument [Line Items]
Debt Instrument Interest Rate at Period End		1.60%		1.60%
Eurodollar [Member] \| Second Amended Credit Agreement
Debt Instrument [Line Items]
Basis spread on variable rate				1.50%
Minimum [Member] \| Second Amended Credit Agreement
Debt Instrument [Line Items]
Proceeds Received From Loan Party Of Subsidiary	$ 5,000
Subsequent Event \| Second Amended Credit Agreement
Debt Instrument [Line Items]
Maturity Date								Jul. 30, 2026
Subsequent Event \| Second Amended Credit Agreement \| Four Hundred Fifty Million Term Loan Facility
Debt Instrument [Line Items]
Debt Instrument Periodic Payment Percentage						0.625%	1.25%