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.

No definition available.

+ Details

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

- Definition

Amount, after tax and before reclassification, of gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669646-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e637-108580

+ Details

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

- Definition

Amount, after tax, of reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 11
-URI https://asc.fasb.org/extlink&oid=126968391&loc=d3e637-108580

+ Details

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

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=hr_InterestRateSwap2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=hr_InterestRateSwap2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=hr_InterestRateSwap2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=hr_InterestRateSwap2022Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_TreasuryLockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=hr_SettledInterestRateSwapsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_IncomeStatementLocationAxis=us-gaap_InterestExpenseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Derivative Financial Instruments - Effect of Cash Flow Hedging on AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Gains (losses) arising during the period on interest rate swaps and treasury rate locks	$ 10,630
Reclassification adjustments for losses included in net income (interest expense)	(1,527)	$ (4,472)	$ (3,472)
Interest rate swaps 2017
Derivative [Line Items]
Gains (losses) arising during the period on interest rate swaps and treasury rate locks	302
Interest rate swaps 2018
Derivative [Line Items]
Gains (losses) arising during the period on interest rate swaps and treasury rate locks	616
Interest rate swaps 2019
Derivative [Line Items]
Gains (losses) arising during the period on interest rate swaps and treasury rate locks	12,964
Interest rate swaps 2022
Derivative [Line Items]
Gains (losses) arising during the period on interest rate swaps and treasury rate locks	(3,252)
Settled treasury hedges
Derivative [Line Items]
Gains (losses) arising during the period on interest rate swaps and treasury rate locks	0	0	$ (4,267)
Settled interest rate swaps
Derivative [Line Items]
Gains (losses) arising during the period on interest rate swaps and treasury rate locks	0
Interest Expense
Derivative [Line Items]
Reclassification adjustments for losses included in net income (interest expense)	1,527	4,472
Interest Expense \| Interest rate swaps 2017
Derivative [Line Items]
Reclassification adjustments for losses included in net income (interest expense)	118	527
Interest Expense \| Interest rate swaps 2018
Derivative [Line Items]
Reclassification adjustments for losses included in net income (interest expense)	361	1,194
Interest Expense \| Interest rate swaps 2019
Derivative [Line Items]
Reclassification adjustments for losses included in net income (interest expense)	563	2,157
Interest Expense \| Interest rate swaps 2022
Derivative [Line Items]
Reclassification adjustments for losses included in net income (interest expense)	(109)	0
Interest Expense \| Settled treasury hedges
Derivative [Line Items]
Reclassification adjustments for losses included in net income (interest expense)	426	426
Interest Expense \| Settled interest rate swaps
Derivative [Line Items]
Reclassification adjustments for losses included in net income (interest expense)	$ 168	$ 168