| **Shareholder's Equity (Deficit) - Textual (Details)In Millions, unless otherwise specified** | Sep. 30, 2009 |
|-----------------------------------------------------------------------------------------------|---------------|
| **Shareholders Deficit (Textual) [Abstract]**                                                 |          |
| Common Stock Shares Issued Under Consolidated Securities Action Settlement                    | 5.0           |
| Common Stock Warrants Issued Under Consolidated Securities Action Settlement                  | 8.2           |

| X                                                                                                                                                                                                                                                                                                                                                                                                                    |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of shares of common stock issued during the period in full satisfaction of the Company's obligation to do so under the Consolidated Securities Action Settlement.
+ References
No definition available.
+ Details**Name:**hls_CommonStockSharesIssuedConsolidatedSecuritiesActionSettlement**Namespace Prefix:**hls_**Data Type:**xbrli:sharesItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                                                                                                                                                                                                                                                                                     |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Number of common stock warrants issued during the period in full satisfaction of the Company's obligation to do so under the Consolidated Securities Action Settlement.
+ References
No definition available.
+ Details**Name:**hls_CommonStockWarrantsIssuedConsolidatedSecuritiesActionSettlement**Namespace Prefix:**hls_**Data Type:**xbrli:sharesItemType**Balance Type:**na**Period Type:**instant |
| X                                                                                                                                                              |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**hls_ShareholdersDeficitTextualAbstract**Namespace Prefix:**hls_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |