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Summary of Significant Accounting Policies - Variable interest entity (Details) $ in Thousands	Mar. 31, 2023 USD ($) property
Variable Interest Entity [Line Items]
Number of owned real estate properties | property	681
Houston, TX | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Notes receivable, carrying amount	$ 30,839
Maximum exposure to loss	31,150
Charlotte, NC | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Notes receivable, carrying amount	5,639
Maximum exposure to loss	6,000
Texas | Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Joint venture, carrying amount	66,038
Maximum exposure to loss	$ 66,038
Number of owned real estate properties | property	7

X

- Definition

Joint Venture, Carrying Amount

+ References

No definition available.

+ Details

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

X

- Definition

Notes Receivable, Carrying Amount

+ References

No definition available.

+ Details

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

X

- Definition

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

+ References

No definition available.

+ Details

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

X

- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=123419778&loc=d3e5747-111685

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph b
-URI https://asc.fasb.org/extlink&oid=123419778&loc=d3e5728-111685

+ Details

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Balance Type:	credit
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X

- 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

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Period Type:	duration

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- Details

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X

- Details

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- Details

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- Details

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