Equity Method Investments [Roll Forward]

No definition available.

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

- Definition

Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures in Period

+ References

No definition available.

+ Details

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

- Definition

Joint Venture, Other Adjustments

+ References

No definition available.

+ Details

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

- Definition

Joint Venture, Real Property, at Cost

+ References

No definition available.

+ Details

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

- Definition

Joint Venture, Square Footage

+ References

No definition available.

+ Details

Name:	hr_JointVentureSquareFootage
Namespace Prefix:	hr_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Number Of Limited Liability Companies

+ References

No definition available.

+ Details

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

- Definition

Number of Parking Garages

+ References

No definition available.

+ Details

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

- Definition

Number of Properties Acquired

+ References

No definition available.

+ Details

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

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of equity impact of cash distributions declared to unit-holder of limited liability company (LLC).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=125520817&loc=d3e70191-108054

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

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

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
-URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(13)(f))
-URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8736-108599

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570

+ Details

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

- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 272
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

Name:	us-gaap_LimitedLiabilityCompanyLLCOrLimitedPartnershipLPManagingMemberOrGeneralPartnerOwnershipInterest
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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

- Definition

The cash outflow associated with the purchase of real estate held-for-investment and real estate joint ventures.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3213-108585

+ Details

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

- Definition

The book value of investments in real estate joint ventures including direct and indirect investments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-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=120400017&loc=d3e572229-122910

+ Details

Name:	us-gaap_RealEstateInvestmentsJointVentures
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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

- Details

Name:	srt_OwnershipAxis=hr_LimitedLiabilityCompanyOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_OwnershipAxis=hr_LimitedLiabilityCompanyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=hr_DenverCOMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_CO
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=hr_SanAntonioTexasMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=hr_MedicalOfficeBuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_MN
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=hr_MedicalOfficeBuilding2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_OtherPropertyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Acquisitions, Dispositions and Mortgage Repayments - Joint Ventures (Details) $ in Thousands															3 Months Ended	12 Months Ended
	Dec. 29, 2021 USD ($) ft²	Dec. 10, 2021 USD ($) ft² property	Oct. 21, 2021 USD ($) ft²	Jul. 27, 2021 USD ($) ft² a	May 10, 2021 USD ($) ft²	Apr. 30, 2021 USD ($) ft²	Apr. 08, 2021 USD ($) ft²	Apr. 01, 2021 USD ($) ft²	Mar. 30, 2021 USD ($) ft²	Dec. 29, 2020 USD ($) ft²	Dec. 08, 2020 USD ($) ft²	Dec. 07, 2020 USD ($) ft²	Nov. 12, 2020 USD ($) ft²	Nov. 09, 2020 property	Dec. 31, 2017 property	Dec. 31, 2021 USD ($) ft² limitedLiabilityCompany property garage	Dec. 31, 2020 USD ($) ft²	Dec. 31, 2019 USD ($)
Real Estate [Line Items]
Joint venture ownership (percent)																	50.00%
PURCHASE PRICE																$ 180,487	$ 125,900
CASH CONSIDERATION																177,994	123,300
REAL ESTATE																179,862	121,600
OTHER																$ (1,868)	$ 1,700
SQUARE FOOTAGE unaudited \| ft²																514,253	325,396
Square footage of real estate properties				3.0													17,000,000
NUMBER OF PROPERTIES \| property		3														242
Equity Method Investments [Roll Forward]
Equity loss recognized during the period																$ (795)	$ (463)	$ (19)
Owner distributions																$ 0	200
Limited Liability Company One
Real Estate [Line Items]
Ownership interest in LLC (percent)																55.00%
Limited Liability Company Two
Real Estate [Line Items]
Ownership interest in LLC (percent)																27.00%
Denver, CO
Real Estate [Line Items]
PURCHASE PRICE			$ 23,000						$ 14,375
CASH CONSIDERATION			22,638						14,056
REAL ESTATE			23,021						14,550
OTHER			$ (383)						$ (494)
SQUARE FOOTAGE unaudited \| ft²			57,257						59,359
Colorado Springs, CO
Real Estate [Line Items]
PURCHASE PRICE				$ 9,133				$ 7,200
CASH CONSIDERATION				9,137				7,288
REAL ESTATE				9,135				7,347
OTHER				$ 2				$ (59)
SQUARE FOOTAGE unaudited \| ft²				23,956				27,510
Los Angeles, CA
Real Estate [Line Items]
PURCHASE PRICE					$ 24,600		$ 31,335
CASH CONSIDERATION					24,259		30,179
REAL ESTATE					24,147		30,642
OTHER					$ 112		$ (463)
SQUARE FOOTAGE unaudited \| ft²					73,078		57,573
San Antonio, TX
Real Estate [Line Items]
PURCHASE PRICE		$ 42,300				$ 13,600
CASH CONSIDERATION		41,892				13,412
REAL ESTATE		42,190				13,656
OTHER		$ (298)				$ (244)
SQUARE FOOTAGE unaudited \| ft²		117,597				45,000
Medical Office Building
Real Estate [Line Items]
Number of buildings acquired \| property														3
Medical Office Building \| Denver, CO
Real Estate [Line Items]
Number of buildings acquired \| property																3
Medical Office Building \| Los Angeles, CA
Real Estate [Line Items]
PURCHASE PRICE										$ 13,200	$ 80,600
CASH CONSIDERATION										13,200	80,500
REAL ESTATE										13,100	79,200
OTHER										$ 100	$ 1,300
SQUARE FOOTAGE unaudited \| ft²										48,759	135,904
Medical Office Building \| San Antonio, TX
Real Estate [Line Items]
PURCHASE PRICE	$ 6,094
CASH CONSIDERATION	6,218
REAL ESTATE	6,308
OTHER	$ (90)
SQUARE FOOTAGE unaudited \| ft²	22,381
Medical Office Building \| MINNESOTA
Real Estate [Line Items]
PURCHASE PRICE												$ 15,500	$ 16,600
CASH CONSIDERATION												15,400	14,200
REAL ESTATE												15,500	13,800
OTHER												$ (100)	$ 400
SQUARE FOOTAGE unaudited \| ft²												48,594	92,139
Medical Office Building 2 \| San Antonio, TX
Real Estate [Line Items]
PURCHASE PRICE	$ 8,850
CASH CONSIDERATION	8,915
REAL ESTATE	8,866
OTHER	$ 49
SQUARE FOOTAGE unaudited \| ft²	30,542
Parking Garages
Real Estate [Line Items]
Number of LLCs \| limitedLiabilityCompany																2
Number of parking garages \| garage																2
Number of buildings acquired \| property															3
Equity Method Investments [Roll Forward]
Net LLC investments, beginning of period																$ 73,100	8,100
New investments during the period																89,600	65,700
Equity loss recognized during the period																(800)	(500)
Net LLC investments, end of period																$ 161,900	$ 73,100	$ 8,100