Business Acquisition Purchase Price Allocation Square Footage.

No definition available.

Name:	hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
Namespace Prefix:	hr_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Notes Assumed, Unamortized Premium

+ References

No definition available.

+ Details

Name:	hr_NotesAssumedUnamortizedPremium
Namespace Prefix:	hr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of medical office buildings in health system.

+ References

No definition available.

+ Details

Name:	hr_NumberOfMedicalOfficeBuildingsInHealthSystem
Namespace Prefix:	hr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of Beds

+ References

No definition available.

+ Details

Name:	hr_NumberofBeds
Namespace Prefix:	hr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of medical office building leased.

+ References

No definition available.

+ Details

Name:	hr_PercentageOfMedicalOfficeBuildingLeased
Namespace Prefix:	hr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of property leased.

+ References

No definition available.

+ Details

Name:	hr_PercentageOfPropertyLeased
Namespace Prefix:	hr_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

+ Details

Name:	us-gaap_BusinessCombinationConsiderationTransferred1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of liabilities incurred by the acquirer as part of consideration transferred in a business combination.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 25

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6405-128476

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 7

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 30

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477

+ Details

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

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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 210.5-02.22(a)(1))

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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

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

- Details

Name:	us-gaap_StatementGeographicalAxis=stpr_WA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis=hr_RealEstateAcquisitionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=stpr_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=hr_KaiserPermanenteandWashingtonHospitalHealthcareSystemMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=hr_KaiserPermanenteMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CounterpartyNameAxis=hr_WashingtonHospitalHealthcareSystemMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Real Estate Investments - Acquisitions (Details) - Real Estate Acquisitions [Member] $ in Millions		1 Months Ended
	Jun. 26, 2015 USD ($) ft²	Jun. 30, 2015 USD ($) ft² Bed	Jan. 31, 2015 USD ($) ft² building Bed
Washington [Member]
Business Acquisition [Line Items]
Square footage \| ft²	35,558	35,558
Purchase price		$ 13.9
Cash consideration		4.4
Mortgage notes payable assumed	$ 9.5	9.5
Fair value premium recorded upon acquisition	$ 0.2	$ 0.2
Stated interest rate (percent)	5.75%	5.75%
Number of Beds \| Bed		177
Percentage of medical office building leased		93.00%
Percentage of property leased		69.00%
California [Member]
Business Acquisition [Line Items]
Purchase price			$ 39.3
Number of medical office buildings in health system \| building			2
Percentage of medical office building leased			97.00%
Kaiser Permanente and Washington Hospital Healthcare System [Member] \| California [Member]
Business Acquisition [Line Items]
Square footage \| ft²			110,679
Percentage of property leased			59.00%
Kaiser Permanente [Member] \| California [Member]
Business Acquisition [Line Items]
Number of Beds \| Bed			106
Washington Hospital Healthcare System [Member] \| California [Member]
Business Acquisition [Line Items]
Number of Beds \| Bed			353