XML 47 R36.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Investments in and Advances to Nonconsolidated Affiliates - Textual (Details) $ in Millions | Mar. 31, 2018 USD ($) entity | Dec. 31, 2017 USD ($)
--- | --- | ---
Investments In and Advances to Nonconsolidated Affiliates (Textual) [Abstract] |  |
Investments in and advances to nonconsolidated affiliates | $ | $ 13.0 | $ 11.9
Number of partially owned subsidiaries | 6 |
Number of partially owned general or limited partnerships, limited liability companies of joint ventures | 5 |
Minimum [Member] |  |
Investments In and Advances to Nonconsolidated Affiliates (Textual) [Abstract] |  |
Ownership interest in affiliates (percent) | 1.00% |
Maximum [Member] |  |
Investments In and Advances to Nonconsolidated Affiliates (Textual) [Abstract] |  |
Ownership interest in affiliates (percent) | 60.00% |

X
- Definition The percentage of ownership by the Company in the investee accounted for under the equity or cost methods of accounting. + References No definition available. + Details
Name: | ehc_AffiliatesOwnershipPercentage
Namespace Prefix: | ehc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Investments in and advances to nonconsolidated affiliates. + References No definition available. + Details
Name: | ehc_InvestmentsInAndAdvancesToNonconsolidatedAffiliatesTextualAbstract
Namespace Prefix: | ehc_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of general or limited partnerships, limited liability companies, or joint ventures of which the Company has investments. + References No definition available. + Details
Name: | ehc_NumberOfGeneralOrLimitedPartnershipsLimitedLiabilityCompaniesOrJointVentures
Namespace Prefix: | ehc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of partially owned subsidiaries in which the Company has investments but are not consolidated. + References No definition available. + Details
Name: | ehc_NumberOfPartiallyOwnedSubsidiariesNonconsolidated
Namespace Prefix: | ehc_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |