Area covered under real estate investment sold in measurement units.

No definition available.

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

- Definition

Closing Adjustments Disposed Entity, including closing costs and other adjustments to the sales price.

+ References

No definition available.

+ Details

Name:	hr_ClosingAdjustmentsDisposedEntity
Namespace Prefix:	hr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Disposition Sales Price

+ References

No definition available.

+ Details

Name:	hr_DispositionSalesPrice
Namespace Prefix:	hr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of Agreements to Sell Leased Properties

+ References

No definition available.

+ Details

Name:	hr_NumberOfAgreementsToSellLeasedProperties
Namespace Prefix:	hr_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Real estate dispositions.

+ References

No definition available.

+ Details

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Namespace Prefix:	hr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Real estate investment net disposed of during the Period.

+ References

No definition available.

+ Details

Name:	hr_RealEstateInvestmentNetDisposedOfDuringPeriod
Namespace Prefix:	hr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Real estate other.

+ References

No definition available.

+ Details

Name:	hr_RealEstateOther
Namespace Prefix:	hr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

+ Details

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

- Definition

Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3179-108585

+ Details

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

- Details

Name:	hr_RealEstateDispositionsAndMortgageNoteRepaymentsAxis=hr_RealEstateDispositionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Namespace Prefix:
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- Details

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Real Estate Investments - Dispositions (Details) ft² in Thousands, $ in Thousands			3 Months Ended
	Sep. 30, 2020 USD ($) ft²	Jul. 30, 2020 USD ($) ft²	Jun. 30, 2020 numberOfAgreements	May 31, 2020 USD ($)
Real Estate Dispositions [Line Items]
Sales price				$ 244,500
Real Estate Dispositions
Real Estate Dispositions [Line Items]
Sales price	$ 249,500
Closing adjustments	(200)
Net proceeds	249,300
Net Real Estate Investment	171,800
Real estate other	7,100
Gain/(impairment)	$ 70,400
Square footage \| ft²	412
Real Estate Dispositions \| Springfield, MO
Real Estate Dispositions [Line Items]
Sales price		$ 138,000
Closing adjustments		0
Net proceeds		138,000
Net Real Estate Investment		92,400
Real estate other		3,900
Gain/(impairment)		$ 41,700
Square footage \| ft²		186
Real Estate Dispositions \| Oklahoma City, OK
Real Estate Dispositions [Line Items]
Sales price		$ 106,500
Closing adjustments		0
Net proceeds		106,500
Net Real Estate Investment		76,800
Real estate other		3,100
Gain/(impairment)		$ 26,600
Square footage \| ft²		200
Number of agreements to sell leased properties \| numberOfAgreements			2
Real Estate Dispositions \| Miami, FL
Real Estate Dispositions [Line Items]
Sales price	$ 5,000
Closing adjustments	(200)
Net proceeds	4,800
Net Real Estate Investment	2,600
Real estate other	100
Gain/(impairment)	$ 2,100
Square footage \| ft²	26