Anticipated amount of investment.

No definition available.

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Namespace Prefix:	hr_
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- Definition

Corporate office lease area.

+ References

No definition available.

+ Details

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Namespace Prefix:	hr_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Operating lease expiration period maximum expiration date.

+ References

No definition available.

+ Details

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

Percentage of increase in corporate office lease base rent.

+ References

No definition available.

+ Details

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Namespace Prefix:	hr_
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- Definition

prepaid lease rentals.

+ References

No definition available.

+ Details

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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

No definition available.

+ Details

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

- Definition

Date which lease or group of leases is set to expire, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	us-gaap_LeaseExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees.

+ References

No definition available.

+ Details

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

- Definition

The number of claims settled and dismissed during the period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 4

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349

+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of separate real estate development properties located on land subject to ground leases.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Details

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Period Type:	duration

- Details

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Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Commitments and Contingencies - Narrative (Details) (USD $)	12 Months Ended
	Dec. 31, 2014 sqft litigation_settlement property	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Number of ground leases related to real estate investments under operating lease agreements	45
Operating lease expiration period maximum expiration date	2105
Approximately corporate office lease covers of rented space	36,653hr_CorporateOfficeLeaseArea
Percentage on increases of annual base rent on the corporate office lease	3.25%
Rental expense relating to the operating leases	$ 4,900,000us-gaap_LeaseAndRentalExpense	$ 4,400,000us-gaap_LeaseAndRentalExpense	$ 4,300,000us-gaap_LeaseAndRentalExpense
Prepaid ground leases which represented rental expense	500,000hr_PrepaidLeaseRentals
Number of claims settled	1
General and Administrative Expense [Member]
Property, Plant and Equipment [Line Items]
Litigation expense	950,000
Second Generation Leases [Member] \| Tenant Improvement Allowances [Member]
Property, Plant and Equipment [Line Items]
Anticipated amount of investment	13,400,000
Corporate Office Lease [Member]
Property, Plant and Equipment [Line Items]
Corporate lease expiration date	Oct. 31, 2020
Minimum [Member] \| First Generation Leases [Member] \| Tenant Improvement Allowances [Member]
Property, Plant and Equipment [Line Items]
Anticipated amount of investment	11,900,000
Maximum [Member] \| First Generation Leases [Member] \| Tenant Improvement Allowances [Member]
Property, Plant and Equipment [Line Items]
Anticipated amount of investment	$ 15,600,000