XML 97 R51.htm IDEA: XBRL DOCUMENT v2.4.1.9
Significant Acquisitions and Dispositions (Summary of Significant Assumptions Utilized in Estimates) (Details)
12 Months Ended
Dec. 31, 2014
months
Dec. 31, 2013
months
Fair Value Inputs, Cap Rate 8.50%us-gaap_FairValueInputsCapRate  
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot 12.50dre_FairValueMeasurementWithUnobservableInputsRentalRatePerSquareFoot  
Minimum [Member]    
Fair Value Inputs, Discount Rate 7.38%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
6.49%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Fair Value Inputs, Cap Rate 5.98%us-gaap_FairValueInputsCapRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
5.09%us-gaap_FairValueInputsCapRate
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Lease-up period (months) 12dre_FairValueMeasurementWithUnobservableInputsLeaseUpPeriodInMonths
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
12dre_FairValueMeasurementWithUnobservableInputsLeaseUpPeriodInMonths
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Minimum [Member] | Industrial [Member]    
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot 2.75dre_FairValueMeasurementWithUnobservableInputsRentalRatePerSquareFoot
/ dre_BusinessAcquisitionRealEstatePropertiesAcquiredAxis
= us-gaap_WarehouseMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
2.90dre_FairValueMeasurementWithUnobservableInputsRentalRatePerSquareFoot
/ dre_BusinessAcquisitionRealEstatePropertiesAcquiredAxis
= us-gaap_WarehouseMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Minimum [Member] | Medical Office [Member]    
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot 19.56dre_FairValueMeasurementWithUnobservableInputsRentalRatePerSquareFoot
/ dre_BusinessAcquisitionRealEstatePropertiesAcquiredAxis
= dre_MedicalOfficeMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
18.00dre_FairValueMeasurementWithUnobservableInputsRentalRatePerSquareFoot
/ dre_BusinessAcquisitionRealEstatePropertiesAcquiredAxis
= dre_MedicalOfficeMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
Maximum [Member]    
Fair Value Inputs, Discount Rate 9.96%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
9.67%us-gaap_FairValueInputsDiscountRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Fair Value Inputs, Cap Rate 8.36%us-gaap_FairValueInputsCapRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
7.67%us-gaap_FairValueInputsCapRate
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Lease-up period (months) 12dre_FairValueMeasurementWithUnobservableInputsLeaseUpPeriodInMonths
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
24dre_FairValueMeasurementWithUnobservableInputsLeaseUpPeriodInMonths
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Maximum [Member] | Industrial [Member]    
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot 9.36dre_FairValueMeasurementWithUnobservableInputsRentalRatePerSquareFoot
/ dre_BusinessAcquisitionRealEstatePropertiesAcquiredAxis
= us-gaap_WarehouseMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
8.28dre_FairValueMeasurementWithUnobservableInputsRentalRatePerSquareFoot
/ dre_BusinessAcquisitionRealEstatePropertiesAcquiredAxis
= us-gaap_WarehouseMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
Maximum [Member] | Medical Office [Member]    
Fair Value Measurement With Unobservable Inputs Rental Rate Per Square Foot 19.56dre_FairValueMeasurementWithUnobservableInputsRentalRatePerSquareFoot
/ dre_BusinessAcquisitionRealEstatePropertiesAcquiredAxis
= dre_MedicalOfficeMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
18.00dre_FairValueMeasurementWithUnobservableInputsRentalRatePerSquareFoot
/ dre_BusinessAcquisitionRealEstatePropertiesAcquiredAxis
= dre_MedicalOfficeMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember