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Summary of Significant Accounting Policies - PP&E Useful Lives (Details) | 12 Months Ended
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Dec. 31, 2018
Buildings [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 30 years
Buildings [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 10 years
Leasehold improvements [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 15 years
Leasehold improvements [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 2 years
Vehicles [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 5 years
Furniture and Fixtures [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 10 years
Furniture and Fixtures [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 3 years
Real Estate [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 25 years
Real Estate [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 15 years
Vehicles [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 3 years
Equipment [Member] | Maximum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 5 years
Equipment [Member] | Minimum [Member] |
Property, Plant and Equipment [Line Items] |
Useful life | 3 years

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

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LeaseholdImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_VehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=ehc_AssetsHeldUnderCapitalLeasesRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=ehc_AssetsHeldUnderCapitalLeasesVehiclesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=ehc_AssetsHeldUnderCapitalLeasesEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |