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Business Combinations - Textual (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 1 Months Ended
Mar. 31, 2015
Mar. 31, 2015
Business Acquisition (Textual) [Abstract]    
Goodwill, Acquired During Period $ 6.0us-gaap_GoodwillAcquiredDuringPeriod  
Integrity Home Health Care [Member]    
Business Acquisition (Textual) [Abstract]    
Goodwill, Acquired During Period   6.0us-gaap_GoodwillAcquiredDuringPeriod
/ us-gaap_BusinessAcquisitionAxis
= hls_IntegrityHomeHealthCareMember
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 6.0us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= hls_IntegrityHomeHealthCareMember		 $ 6.0us-gaap_BusinessAcquisitionPurchasePriceAllocationGoodwillExpectedTaxDeductibleAmount
/ us-gaap_BusinessAcquisitionAxis
= hls_IntegrityHomeHealthCareMember