| **Basis of Presentation Basis of Presentation - Textuals (Details)**                             | 3 Months Ended                                                                                 | 12 Months Ended                                                                                                                                        |
|--------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------|
||
| **Segment Reporting Information [Line Items]**                                                   |                                                                                           |                                                                                                                                                   |
| Initial Suspension Period of Medicare Payments                                                   | 180 days                                                                                       |                                                                                                                                                   |
| Medicare Denials, Percentage Collected After Appeal                                              | 63.00%hls_MedicareDenialsPercentageCollectedAfterAppeal                                        |                                                                                                                                                   |
| Medicare Denials, Percentage Collected After Appeal, Including Administrative Law Judge Hearings | 72.00%hls_MedicareDenialsPercentageCollectedAfterAppealIncludingAdministrativeLawJudgeHearings |                                                                                                                                                   |
| RAC Audits [Member]                                                                              |                                                                                           |                                                                                                                                                   |
| **Segment Reporting Information [Line Items]**                                                   |                                                                                           |                                                                                                                                                   |
| Percentage of average annual patient discharges requested for review, less than                  |                                                                                           | 1.00%hls_Percentageofaverageannualpatientdischargesrequestedforreviewlessthan/ us-gaap_LossContingenciesByNatureOfContingencyAxis= hls_RACAuditsMember |

| X                                                                                                                                                                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The number of days Medicare payments to providers may be initially suspended by CMS. CMS may suspend payments if it possesses reliable information that an overpayment, fraud, or willful misrepresentation exists.
+ References
No definition available.
+ Details**Name:**hls_InitialSuspensionPeriodofMedicarePayments**Namespace Prefix:**hls_**Data Type:**xbrli:durationItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The historical collection percentage of accounts receivable that have been denied and appealed as of the balance sheet date.  The denial of certain diagnosis codes by Medicare contractors are based on medical necessity and in most instances are disputed or appealed by the Company.
+ References
No definition available.
+ Details**Name:**hls_MedicareDenialsPercentageCollectedAfterAppeal**Namespace Prefix:**hls_**Data Type:**num:percentItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
The historical collection percentage of accounts receivable that have been denied and appealed up to an administrative law judge hearing as of the balance sheet date.  The denial of certain diagnosis codes by Medicare contractors are based on medical necessity and in most instances are disputed or appealed by the Company.
+ References
No definition available.
+ Details**Name:**hls_MedicareDenialsPercentageCollectedAfterAppealIncludingAdministrativeLawJudgeHearings**Namespace Prefix:**hls_**Data Type:**num:percentItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                              |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Percentage of average annual patient discharges between 2010 and 2013 requested for review.
+ References
No definition available.
+ Details**Name:**hls_Percentageofaverageannualpatientdischargesrequestedforreviewlessthan**Namespace Prefix:**hls_**Data Type:**num:percentItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                        |
|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_SegmentReportingInformationLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_LossContingenciesByNatureOfContingencyAxis=hls_RACAuditsMember**Namespace Prefix:****Data Type:**na**Balance Type:****Period Type:** |