Segment Reporting - Textual (Details)	9 Months Ended
Sep. 30, 2021 state hospital segment location
Segment Reporting Information [Line Items]
Number of operating segments \| segment	2
Number of states in which entity operates \| state	42
Inpatient Rehabilitation
Segment Reporting Information [Line Items]
Number of states in which entity operates \| state	35
Number of inpatient rehabilitation hospitals operated	144
Number of solely owned inpatient rehabilitation hospitals	91
Number of jointly owned inpatient rehabilitation hospitals	53
Number of inpatient rehabilitation units under management contracts	4
Inpatient Rehabilitation \| Minimum
Segment Reporting Information [Line Items]
Joint venture ownership percentage	50.00%
Inpatient Rehabilitation \| Maximum
Segment Reporting Information [Line Items]
Joint venture ownership percentage	97.50%
Home Health and Hospice
Segment Reporting Information [Line Items]
Number of states in which entity operates \| state	34
Number of home health locations \| location	249
Number of hospice locations \| location	95
Number of hospitals or agencies operated as a joint venture	1
Number of solely owned hospital based home health and hospice locations \| location	335
Number of jointly owned hospital based home health and hospice locations \| location	9
Home Health and Hospice \| Minimum
Segment Reporting Information [Line Items]
Joint venture ownership percentage	50.00%
Home Health and Hospice \| Maximum
Segment Reporting Information [Line Items]
Joint venture ownership percentage	90.00%

Joint venture ownership percentage

No definition available.

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- Definition

Total number of inpatient rehabilitation hospitals owned and operated as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	ehc_NumberOfInpatientRehabilitationHospitals
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Data Type:	xbrli:integerItemType
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- Definition

Number of inpatient rehabilitation units under management contracts with the Company as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	ehc_
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- Definition

Number of Joint Ventures Accounted for Using the Equity Method

+ References

No definition available.

+ Details

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Namespace Prefix:	ehc_
Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

Number of home health locations the Company owns and operates as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	ehc_
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- Definition

Number of hospice locations the Company owns and operates as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	ehc_
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Period Type:	instant

- Definition

Number of jointly owned hospital based home health and hospice agencies the Company owns and operates as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	ehc_
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Balance Type:	na
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- Definition

Total number of jointly owned inpatient rehabilitation hospitals owned and operated as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	ehc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of solely owned hospital based home health and hospice agencies the Company owns and operates as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	ehc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Total number of solely owned inpatient rehabilitation hospitals owned and operated as of the balance sheet date.

+ References

No definition available.

+ Details

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Namespace Prefix:	ehc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

+ Details

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Period Type:	duration

- Definition

The number of states the entity operates in as of the balance sheet date.

+ References

No definition available.

+ Details

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- 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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- Details

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- Details

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- Details

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