Name:	hls_EstimatedUltimateLossesReductionRelatedToPriorLossPeriods
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Maximum amount that would be funded by the Company's wholly-owned captive insurance subsidiary to insure a portion of our professional liability, general liability, and workers' compensation risks through a self-insured retention program.

No definition available.

Name:	hls_MaximumSelfInsuredRisk
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Number of individual claims covered by the Company's self-insured risk reserves.

No definition available.

Name:	hls_NumberOfIndividualClaimsCoveredBySelfInsuredRiskReserves
Namespace Prefix:	hls_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Payments made during the periods presented for liability claims related to the Company's self-insured risks net of reinsurance recoveries.

No definition available.

Name:	hls_PaymentsLiabilityClaimsNetOfReinsuranceRecoveries
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Total costs incurred by the Company for premiums paid to maintain excess loss contracts with insurers and reinsurers for professional and general liability risks.

No definition available.

Name:	hls_ProfessionalAndGeneralLiabilityExcessLossContractsTotalCosts
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Current portion of receivables currently due from reinsurers for ceded claims paid.

No definition available.

Name:	hls_ReinsuranceReceivablesCurrent
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Receipts received from reinsurers for liabilities related to the Company's self-insured risks.

No definition available.

Name:	hls_ReinsuranceRecoveries
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Total costs incurred by the Company related to its professional and general liability self-insured risks.

No definition available.

Name:	hls_RetainedProfessionalAndGeneralLiabilityRisksTotalCosts
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Expenses classified in salaries and benefits and associated with the Company's retained workers' compensation self-insured risks.

No definition available.

Name:	hls_RetainedWorkersCompensationRisksSalariesAndBenefits
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Total costs incurred by the Company related to its workers' compensation self-insured risks.

No definition available.

Name:	hls_RetainedWorkersCompensationRisksTotalCosts
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	hls_SelfInsuredRisksTextualAbstract
Namespace Prefix:	hls_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Costs (classified as Salaries and Benefits) incurred by the Company for premiums paid to maintain excess loss contracts with insurers and reinsurers for workers' compensation risks.

No definition available.

Name:	hls_WorkersCompensationRisksExcessLossContractsSalariesAndBenefits
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Total costs incurred by the Company for pemiums paid to maintain excess loss contracts with insurers and reinsurers for workers' compensation risks.

No definition available.

Name:	hls_WorkersCompensationRisksExcessLossContractsTotalCosts
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Receivables currently due from reinsurers for ceded claims paid.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 310

-Section 45

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6485522&loc=d3e21409-158489

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.6)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 7

-Section 03

-Paragraph 6

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 605

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547

-Subparagraph (a)(2)

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 113

-Paragraph 14, 15

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 310

-Section 45

-Paragraph 6

-URI http://asc.fasb.org/extlink&oid=6485522&loc=d3e21412-158489

Name:	us-gaap_ReinsuranceReceivablesPaidLossesRecoverable
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.24)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Name:	us-gaap_SelfInsuranceReserve
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property that are expected to be paid within one year (or the normal operating cycle, if longer).

No definition available.