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Segment Reporting Segment Reporting - Textuals (Details) | Dec. 31, 2016 facilities location state hospital
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Segment Reporting Information [Line Items] |
Number of legacy hospital-based Home Health agancies reclassified to Inpatient Rehabilitation segment | hospital | 25
Number of states in which Entity operates | state | 35
Inpatient Rehabilitation Segment [Member] |
Segment Reporting Information [Line Items] |
Number of states in which Entity operates | state | 30
Number of inpatient rehabilitation hospitals | 123
Number of Joint Venture hospitals accounted for using equity method of accounting | 1
Number of inpatient rehabilitation units under management contracts | 5
Home Health and Hospice Segment [Member] |
Segment Reporting Information [Line Items] |
Number of states in which Entity operates | state | 25
Number of Hospital Based Home Health and Hospice Agencies | location | 223
Number of Joint Venture Agencies Accounted for Using the Equity Method | 2

X
- Definition Total number of inpatient rehabilitation hospitals owned and operated as of the balance sheet date. + References No definition available. + Details
Name: | hls_NumberOfInpatientRehabilitationHospitals
Namespace Prefix: | hls_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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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
Name: | hls_NumberOfInpatientRehabilitationUnitsUnderManagementContracts
Namespace Prefix: | hls_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of joint venture hospitals accounted for using the equity method. + References No definition available. + Details
Name: | hls_NumberOfJointVentureHospitalsAccountedForUsingEquityMethod
Namespace Prefix: | hls_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of home health agencies owned and operated before an acquisition. + References No definition available. + Details
Name: | hls_NumberofHomeHealthLocationsBeforeAcquisitions
Namespace Prefix: | hls_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of hospital based home health and hospice agencies the Company owns and operates as of the balance sheet date. + References No definition available. + Details
Name: | hls_NumberofHospitalBasedHomeHealthandHospiceAgencies
Namespace Prefix: | hls_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Total number of joint venture agencies accounted for using the equity method. + References No definition available. + Details
Name: | hls_NumberofJointVentureAgenciesAccountedforUsingtheEquityMethod
Namespace Prefix: | hls_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- 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_SegmentReportingInformationLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=hls_InpatientRehabilitationSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=hls_HomeHealthandHospiceSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |