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

The amount of damages awarded to the plaintiff resulting from litigation.

No definition available.

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

The amount owed to the attorneys for the derivative shareholders plaintiffs as part of the Consolidated Securities Action settlement agreement and expressed as a percentage of any net recoveries received from any future judgments obtained by the Company with respect to certain claims against the Company's former CEO.

No definition available.

Name:	hls_NetRecoveriesPercentageOwedToDerivativeLitigationAttorneys
Namespace Prefix:	hls_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The amount owed to the federal plaintiffs as part of the Consolidated Securities Action settlement agreement and expressed as a percentage of any net recoveries received from any future judgments obtained by the Company with respect to certain claims against the Company's former CEO.

No definition available.

Name:	hls_NetRecoveriesPercentageOwedToFederalPlaintiffs
Namespace Prefix:	hls_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Amounts due under severance agreements with former employees after five years.

No definition available.

Name:	hls_SeveranceAgreementsDueAfterFiveYears
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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Amounts due under severance agreements with former employees within five years.

No definition available.

Name:	hls_SeveranceAgreementsDueWithinFiveYears
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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Amounts due under severance agreements with former employees within four years.

No definition available.

Name:	hls_SeveranceAgreementsDueWithinFourYears
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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Amounts due under severance agreements with former employees within one year.

No definition available.

Name:	hls_SeveranceAgreementsDueWithinOneYear
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
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Amounts due under severance agreements with former employees within three years.

No definition available.

Name:	hls_SeveranceAgreementsDueWithinThreeYears
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
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Amounts due under severance agreements with former employees within two years.

No definition available.

Name:	hls_SeveranceAgreementsDueWithinTwoYears
Namespace Prefix:	hls_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The net proceeds or assets obtained in excess of (less than) the net carrying amount of assets recorded, or assets distributed and liabilities assumed less than (in excess of) estimated litigation liability extinguished, in settlement of a litigation matter. Represents (for other than an insurance entity in its normal claims settlement process), the amount of income (expense) recognized in the period to settle pending or threatened litigation and insurance claims.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

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Data Type:	xbrli:monetaryItemType
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This element represents the expenses incurred by the entity which are directly related and attributable to receiving an award in settlement of litigation.

No definition available.

Name:	us-gaap_LitigationSettlementExpense
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

This element represents the gross amount awarded, to be received by, or to be remitted to the entity in settlement of litigation occurring during the period.

No definition available.

Name:	us-gaap_LitigationSettlementGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Specifies the time period covered by the arrangement.

No definition available.

Name:	us-gaap_LongTermPurchaseCommitmentTimePeriod
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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The portion of the carrying amount as of the balance sheet date of the combined total of loss contingency liabilities which is expected to be resolved within one year or the normal operating cycle, if longer.

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Data Type:	xbrli:monetaryItemType
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The payments made in the period which reduced loss contingency liabilities.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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Describes the form and magnitude of the award the plaintiff seeks in the legal matter, which may include an unspecified amount of money.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14557-108349

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6952336&loc=d3e14435-108349

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The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

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The portion of the carrying amount as of the balance sheet date of a recorded receivable related to a loss contingency accrual that is expected to be collected within one year or the normal operating cycle, if longer. For example, an insurance recovery receivable to the extent that the insurance recovery is probable and does not exceed the amount of the loss previously recognized in the financial statements.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 5

-Paragraph 9, 10, 11, 12

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 460

-SubTopic 10

-Section 50

-Paragraph 3

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Name:	us-gaap_LossContingencyRelatedReceivableCarryingValueCurrent
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Data Type:	xbrli:monetaryItemType
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The remaining amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation to be paid in more than four and within five years from the balance sheet date.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 47

-Paragraph 7

-Subparagraph b

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 440

-SubTopic 10

-Section 50

-Paragraph 4

-Subparagraph (b)

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Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnFifthAnniversary
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The remaining amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation to be paid within one year of the balance sheet date.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The remaining amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation to be paid in more than three and within four years from the balance sheet date.

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Data Type:	xbrli:monetaryItemType
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The remaining amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation to be paid in more than one and within two years from the balance sheet date.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The remaining amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation to be paid in more than two and within three years from the balance sheet date.

Name:	us-gaap_UnrecordedUnconditionalPurchaseObligationBalanceOnThirdAnniversary
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

The remaining amount of the fixed and determinable portion of an unrecorded unconditional purchase obligation to be paid after five years from the balance sheet date.

No definition available.