The number of days in a rate setting interval for auction rate securities.

No definition available.

Name:	hgr_AuctionMarketSecuritiesSeriesRateSettingIntervalPeriod
Namespace Prefix:	hgr_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The exercise value of rights exercised by the entity.

+ References

No definition available.

+ Details

Name:	hgr_ClassOfWarrantOrRightExerciseValue
Namespace Prefix:	hgr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The number of financial instruments held by the reporting entity.

+ References

No definition available.

+ Details

Name:	hgr_NumberOfFinancialInstrumentsHeld
Namespace Prefix:	hgr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Final proceeds received at time of settlement of rights, net of line of credit facility closed.

+ References

No definition available.

+ Details

Name:	hgr_ProceedsFromSettlementOfRights
Namespace Prefix:	hgr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the par value of securities owned by the reporting entity.

+ References

No definition available.

+ Details

Name:	hgr_SecuritiesHeldParValue
Namespace Prefix:	hgr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

This item represents the difference between the gross realized gains and losses realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 16

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The total amount of proceeds received for the sale of securities, categorized neither as held-to-maturity nor trading securities, during the reporting period.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 21

-Subparagraph a

-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 320

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Decrease for amounts repaid on the debt instrument for the period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 4

-Section 08

-Paragraph f

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended		0 Months Ended		0 Months Ended
	Jul. 31, 2010 Line of Credit	Dec. 31, 2010 Auction Rate Security Rights Line of Credit	Dec. 31, 2010 Auction Rate Securities securities	Jul. 02, 2010 Indiana Secondary Market Municipal Bond 1998 (Indiana ARS)	Dec. 31, 2010 Indiana Secondary Market Municipal Bond 1998 (Indiana ARS)	May 31, 2010 Primus Financial Products Subordinated Deferrable Interest Notes (Primus ARS)	Dec. 31, 2010 Primus Financial Products Subordinated Deferrable Interest Notes (Primus ARS)
Investments
Number of securities held			2
Par value of securities			$ 7.5		$ 5.0		$ 2.5
Short-term interest rate reset period (in days)			28 days
Proceeds from sale of marketable securities and ARS						1.5
Price at which put option on Indiana ARS was exercised				5.0
Realized loss on investments sold				0.2
Line of credit facility availed from UBS under buyback agreement	3.6
Line of credit facility closed out		$ 1.4