XML 51 R40.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Investments in and Advances to Nonconsolidated Affiliates - Textual (Details) $ in Millions | Jun. 30, 2018 USD ($) entity | Dec. 31, 2017 USD ($)
--- | --- | ---
Investments In and Advances to Nonconsolidated Affiliates (Textual) [Abstract] |  |
Investments in and advances to nonconsolidated affiliates | $ | $ 12.6 | $ 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 Amount of investment in equity method investee and investment in and advance to affiliate. + 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 210.5-02.12) -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: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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