| **Summary of Significant Accounting Policies - Table 3 (Details)** | 12 Months Ended |
|--------------------------------------------------------------------|-----------------|
||
| Buildings [Member] | Minimum [Member]                              |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 10 years        |
| Buildings [Member] | Maximum [Member]                              |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 30 years        |
| Leasehold improvements [Member] | Minimum [Member]                 |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 2 years         |
| Leasehold improvements [Member] | Maximum [Member]                 |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 15 years        |
| Furniture and Fixtures [Member] | Minimum [Member]                 |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 3 years         |
| Furniture and Fixtures [Member] | Maximum [Member]                 |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 10 years        |
| Real Estate [Member] | Minimum [Member]                            |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 15 years        |
| Real Estate [Member] | Maximum [Member]                            |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 20 years        |
| Equipment [Member] | Minimum [Member]                              |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 3 years         |
| Equipment [Member] | Maximum [Member]                              |            |
| **Useful lives of assets**                                         |            |
| Useful Life                                                        | 5 years         |

| X                                                                                                                                                       |
|---------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**hls_UsefulLivesOfAssetsAbstract**Namespace Prefix:**hls_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - 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 |