Real Estate and Mortgage Notes Receivable Investments (Details Textual) (USD $)	6 Months Ended
Jun. 30, 2011
Real Estate and Mortgage Notes Receivable Investments (Textuals) [Abstract]
Company's investments	$ 2,739,117,000
Number of investments, whole units	203
Number of investments, total whole units	216
Number of states that the Company owns real estate in, whole units	28
Square Feet, whole units	13,400,000
Allowance on interest receivable on mortgage notes receivables	200,000
Principal amount of mortgage notes receivables on which allowances on interest receivables is recorded	4,400,000
Ladco [Member]
Real Estate and Mortgage Notes Receivable Investments (Textuals) [Abstract]
Amount of mortgage notes receivable due to affiliates	72,900,000
Percentage of mortgage notes receivable due to affiliates	59.50%
United Trust Fund [Member]
Real Estate and Mortgage Notes Receivable Investments (Textuals) [Abstract]
Amount of mortgage notes receivable due to affiliates	$ 24,000,000
Percentage of mortgage notes receivable due to affiliates	19.60%

Allowance on interest receivable on mortgage notes receivables.

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Namespace Prefix:	hr
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of mortgage notes receivable due to affiliates.

+ Details

Name:	hr_AmountOfMortgageNotesReceivableDueToAffiliates
Namespace Prefix:	hr
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of real estate investments.

+ Details

Name:	hr_NumberOfRealEstateInvestments
Namespace Prefix:	hr
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of mortgage notes receivable due to affiliates.

+ Details

Name:	hr_PercentageOfMortgageNotesReceivableDueToAffiliates
Namespace Prefix:	hr
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Principal amount of mortgage notes receivables on which allowances on interest receivables is recorded.

+ Details

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Namespace Prefix:	hr
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Real Estate and Mortgage Notes Receivable Investments.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
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- Definition

Real estate investments property owned in number of states.

+ Details

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Namespace Prefix:	hr
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

The number of real estate properties owned as of the balance sheet date.

+ Details

Name:	us-gaap_NumberOfRealEstateProperties
Namespace Prefix:	us-gaap
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Investments in real estate held solely for investment purposes (income production and capital appreciation).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 7
-Section 03
-Paragraph 1
-Subparagraph d

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 210.7-03.1(d))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

Name:	us-gaap_RealEstateInvestments
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of square footage related to a real estate property.

+ Details

Name:	us-gaap_SquareFootageOfRealEstateProperty
Namespace Prefix:	us-gaap
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration