XML 51 R56.htm IDEA: XBRL DOCUMENT v2.4.1.9
Acquisitions, Dispositions and Mortgage Repayments - Acquisitions (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
sqft
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Elimination of Construction Mortgage Note Receivable $ 81.2hr_BusinessCombinationConsiderationTransferredConstructionNoteReceivablePrepayment $ 97.2hr_BusinessCombinationConsiderationTransferredConstructionNoteReceivablePrepayment  
Real estate acquisitions [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Purchase Price 168.5us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 315.2us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		  
Elimination of Construction Mortgage Note Receivable   97.2hr_BusinessCombinationConsiderationTransferredConstructionNoteReceivablePrepayment
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		  
Elimination of Mortgage Note Receivable (121.2)hr_BusinessCombinationConsiderationTransferredNoteReceivablePrepayment
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		    
Mortgage Notes Payable Assumed (18.2)us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 [1] (39.6)us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 [1]  
Cash Consideration 69.1us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 [2] 178.4us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 [2]  
Real Estate 206.5hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 314.1hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		  
Other 2.1hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 [3] 1.1hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 [3]  
Square Footage 673,454hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 940,925hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		  
Business Combination Liabilities Assumed Fair Value Adjustment 1.4hr_NotesAssumedUnamortizedPremium
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		 1.4hr_NotesAssumedUnamortizedPremium
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember		  
Real estate acquisitions [Member] | Minnesota [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired Jul. 28, 2014    
Purchase Price 19.8us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MN		 [4]    
Mortgage Notes Payable Assumed (11.4)us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MN		 [4]    
Cash Consideration 8.4us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MN		 [2],[4]    
Real Estate 20.9hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MN		 [4]    
Other (1.0)hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MN		 [3],[4]    
Square Footage 60,476hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MN		 [4]    
Business Combination Liabilities Assumed Fair Value Adjustment 1.0hr_NotesAssumedUnamortizedPremium
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MN		    
Real estate acquisitions [Member] | Florida [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired Sep. 16, 2014    
Purchase Price 7.9us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_FL		    
Cash Consideration 7.9us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_FL		 [2]    
Real Estate 7.9hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_FL		    
Square Footage 47,962hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_FL		    
Real estate acquisitions [Member] | North Carolina [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired Jun. 06, 2014 Oct. 30, 2013  
Purchase Price 6.5us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		 20.1us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		  
Mortgage Notes Payable Assumed   (11.0)us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		 [1]  
Cash Consideration 6.5us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		 [2] 9.1us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		 [2]  
Real Estate 6.5hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		 20.0hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		  
Other   0.1hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		 [3]  
Square Footage 35,292hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		 90,633hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		  
Business Combination Liabilities Assumed Fair Value Adjustment   0.2hr_NotesAssumedUnamortizedPremium
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_NC		  
Real estate acquisitions [Member] | Texas [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired Jun. 04, 2014    
Purchase Price 8.7us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		    
Cash Consideration 8.7us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		 [2]    
Real Estate 8.8hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		    
Other (0.1)hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		 [3]    
Square Footage 48,048hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		    
Real estate acquisitions [Member] | Tennessee [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired   Jan. 29, 2013  
Purchase Price   16.2us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TN		  
Cash Consideration   16.2us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TN		 [2]  
Real Estate   15.7hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TN		  
Other   0.5hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TN		 [3]  
Square Footage   52,225hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TN		 39,345hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_TN
Real estate acquisitions [Member] | Washington [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired Dec. 01, 2014 Oct. 18, 2013  
Purchase Price 22.7us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		 34.9us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		  
Mortgage Notes Payable Assumed (16.6)us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		 (16.6)us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		 [1]  
Cash Consideration 22.7us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		 [2] 18.3us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		 [2]  
Real Estate 18.9hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		 35.4hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		  
Other 3.8hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		 [3] (0.5)hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		 [3]  
Square Footage 60,161hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		 81,956hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		  
Business Combination Liabilities Assumed Fair Value Adjustment   0.5hr_NotesAssumedUnamortizedPremium
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_WA		  
Real estate acquisitions [Member] | Iowa [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired Mar. 28, 2014    
Purchase Price 0us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IA		    
Elimination of Mortgage Note Receivable (40.0)hr_BusinessCombinationConsiderationTransferredNoteReceivablePrepayment
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IA		    
Real Estate 40.2hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IA		    
Other (0.2)hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IA		 [3]    
Square Footage 152,655hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IA		    
Real estate acquisitions [Member] | Indiana [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired   Aug. 08, 2013  
Purchase Price   44.3us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IN		  
Cash Consideration   44.3us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IN		 [2]  
Real Estate   43.3hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IN		  
Other   1.0hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IN		 [3]  
Square Footage   205,573hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_IN		  
Real estate acquisitions [Member] | Missouri [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired   Sep. 27, 2013  
Purchase Price   102.6us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MO		  
Elimination of Construction Mortgage Note Receivable   97.2hr_BusinessCombinationConsiderationTransferredConstructionNoteReceivablePrepayment
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MO		  
Cash Consideration   5.4us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MO		 [2]  
Real Estate   102.6hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MO		  
Square Footage   186,000hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_StatementGeographicalAxis
= stpr_MO		  
Oklahoma One [Member] | Real estate acquisitions [Member] | Oklahoma [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired May 22, 2014    
Purchase Price 85.4us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		    
Elimination of Mortgage Note Receivable (81.2)hr_BusinessCombinationConsiderationTransferredNoteReceivablePrepayment
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		    
Cash Consideration 4.2us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		 [2]    
Real Estate 85.4hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		    
Square Footage 200,000hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		    
Oklahoma Two [Member] | Real estate acquisitions [Member] | Oklahoma [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired Oct. 29, 2014    
Purchase Price 17.5us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		 [4]    
Mortgage Notes Payable Assumed (6.8)us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		 [4]    
Cash Consideration 10.7us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		 [2],[4]    
Real Estate 17.9hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		 [4]    
Other (0.4)hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		 [3],[4]    
Square Footage 68,860hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_OklahomaTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_OK		 [4]    
Texas One [Member] | Real estate acquisitions [Member] | Texas [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired   Apr. 08, 2013  
Purchase Price   16.3us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_TexasOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		  
Cash Consideration   16.3us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_TexasOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		 [2]  
Real Estate   16.3hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_TexasOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		  
Square Footage   42,627hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_TexasOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		  
Texas Two [Member] | Real estate acquisitions [Member] | Texas [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired   Dec. 16, 2013  
Purchase Price   19.0us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_TexasTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		  
Cash Consideration   19.0us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_TexasTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		 [2]  
Real Estate   19.1hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_TexasTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		  
Other   (0.1)hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_TexasTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		 [3]  
Square Footage   97,552hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_TexasTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_TX		  
Colorado One [Member] | Real estate acquisitions [Member] | Colorado [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired   Sep. 27, 2013  
Purchase Price   33.2us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
Mortgage Notes Payable Assumed   (12.0)us-gaap_BusinessCombinationConsiderationTransferredLiabilitiesIncurred
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		 [1]  
Cash Consideration   21.2us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		 [2]  
Real Estate   32.9hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
Other   0.3hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		 [3]  
Square Footage   80,153hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
Business Combination Liabilities Assumed Fair Value Adjustment   0.7hr_NotesAssumedUnamortizedPremium
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoOneMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
Colorado Two [Member] | Real estate acquisitions [Member] | Colorado [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired   Oct. 24, 2013  
Purchase Price   21.6us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
Cash Consideration   21.6us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		 [2]  
Real Estate   21.7hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
Other   (0.1)hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		 [3]  
Square Footage   70,138hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoTwoMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
Colorado Three [Member] | Real estate acquisitions [Member] | Colorado [Member]      
Real Estate Acquisitions and Mortgage Note Financing [Line Items]      
Date Acquired   Dec. 16, 2013  
Purchase Price   7.0us-gaap_BusinessCombinationConsiderationTransferred1
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoThreeMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
Cash Consideration   7.0us-gaap_PaymentsToAcquireBusinessesGross
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoThreeMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		 [2]  
Real Estate   7.1hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRealProperty
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoThreeMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
Other   $ (0.1)hr_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedIntangibleAssetsFairValueAdjustmentsandOther
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoThreeMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		 [3]  
Square Footage   34,068hr_BusinessAcquisitionPurchasePriceAllocationSquareFootage
/ hr_RealEstateAcquisitionsAndMortgageNoteFinancingAxis
= hr_RealEstateAcquisitionsMember
/ us-gaap_RealEstateAndAccumulatedDepreciationDescriptionOfPropertyAxis
= hr_ColoradoThreeMember
/ us-gaap_StatementGeographicalAxis
= stpr_CO		  
[1] The mortgage notes payable assumed in the acquisitions do not reflect the fair value adjustments totaling $1.4 million recorded by the Company upon acquisition (included in Other).
[2] Cash consideration excludes non-real estate assets acquired and liabilities assumed in the acquisitions.
[3] Includes intangibles recognized at acquisition and fair value adjustments on debt assumed.
[4] The mortgage notes payable assumed in the acquisitions do not reflect the fair value adjustment totaling $1.4 million recorded by the Company upon acquisition (included in Other).