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

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.

No definition available.

Name:	hls_CommonStockWarrantsIssuedConsolidatedSecuritiesActionSettlement
Namespace Prefix:	hls_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant