Property Investments (Details Textual) (USD $) In Billions, unless otherwise specified	Dec. 31, 2014 property
Real Estate Investment Property, Net [Abstract]
Investment in real estate properties and mortgage notes	$ 3.3
Number of real estate investments	199hr_NumberOfRealEstateInvestments

Investment in real estate properties and mortgage notes.

No definition available.

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