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Segment Reporting Summary of Net Operating Income (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Segment Reporting Information [Line Items]      
Straight line rent adjustments, net $ 19,965dre_Straightlinerentadjustmentsnet $ 14,633dre_Straightlinerentadjustmentsnet $ 19,546dre_Straightlinerentadjustmentsnet
Income (Loss) from Equity Method Investments 94,317us-gaap_IncomeLossFromEquityMethodInvestments 54,116us-gaap_IncomeLossFromEquityMethodInvestments 4,674us-gaap_IncomeLossFromEquityMethodInvestments
Interest Expense (219,613)us-gaap_InterestExpense (228,324)us-gaap_InterestExpense (229,417)us-gaap_InterestExpense
Depreciation, Depletion and Amortization, Nonproduction (384,412)us-gaap_DepreciationAndAmortization (392,627)us-gaap_DepreciationAndAmortization (348,268)us-gaap_DepreciationAndAmortization
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal 162,715us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal 59,179us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal 344us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
Impairment Charges (49,106)us-gaap_AssetImpairmentCharges (3,777)us-gaap_AssetImpairmentCharges 0us-gaap_AssetImpairmentCharges
Other Nonoperating Income (Expense) 1,246us-gaap_OtherNonoperatingIncomeExpense 1,887us-gaap_OtherNonoperatingIncomeExpense 514us-gaap_OtherNonoperatingIncomeExpense
Other Operating Income (Expense), Net (229)us-gaap_OtherOperatingIncomeExpenseNet 470us-gaap_OtherOperatingIncomeExpenseNet (633)us-gaap_OtherOperatingIncomeExpenseNet
General and Administrative Expense (49,362)us-gaap_GeneralAndAdministrativeExpense (42,673)us-gaap_GeneralAndAdministrativeExpense (46,424)us-gaap_GeneralAndAdministrativeExpense
Gain on land sales 10,441dre_EarningsFromSalesOfLand 9,547dre_EarningsFromSalesOfLand 0dre_EarningsFromSalesOfLand
Undeveloped land carrying costs (6,962)dre_UndevelopedLandCarryingCosts (8,614)dre_UndevelopedLandCarryingCosts (8,829)dre_UndevelopedLandCarryingCosts
Gains (Losses) on Extinguishment of Debt (283)us-gaap_GainsLossesOnExtinguishmentOfDebt (9,433)us-gaap_GainsLossesOnExtinguishmentOfDebt 0us-gaap_GainsLossesOnExtinguishmentOfDebt
Acquisition-related activity (1,099)dre_Acquisitionrelatedactivity (3,093)dre_Acquisitionrelatedactivity (4,192)dre_Acquisitionrelatedactivity
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest 225,125us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest 56,320us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest (85,722)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
Operating Segments [Member]      
Segment Reporting Information [Line Items]      
Property Level Net Operating Income – Cash Basis 607,833dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
543,421dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
468,908dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
Property Level Net Income, Cash Basis, Continuing Operations 627,268dre_PropertyLevelNetIncomeCashBasisContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
584,757dre_PropertyLevelNetIncomeCashBasisContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
510,387dre_PropertyLevelNetIncomeCashBasisContinuingOperations
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
Operating Segments [Member] | Industrial [Member]      
Segment Reporting Information [Line Items]      
Property Level Net Operating Income – Cash Basis 385,578dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_WarehouseMember
349,197dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_WarehouseMember
311,241dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_WarehouseMember
Operating Segments [Member] | Office Building [Member]      
Segment Reporting Information [Line Items]      
Property Level Net Operating Income – Cash Basis 130,284dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_OfficeBuildingMember
122,412dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_OfficeBuildingMember
116,850dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_OfficeBuildingMember
Operating Segments [Member] | Medical Office [Member]      
Segment Reporting Information [Line Items]      
Property Level Net Operating Income – Cash Basis 91,301dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dre_MedicalOfficeMember
71,248dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dre_MedicalOfficeMember
40,027dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dre_MedicalOfficeMember
Operating Segments [Member] | Other Segments [Member]      
Segment Reporting Information [Line Items]      
Property Level Net Operating Income – Cash Basis 670dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
564dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
790dre_PropertyLevelNetOperatingIncomeCashBasis
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= us-gaap_AllOtherSegmentsMember
Operating Segments [Member] | Service Operations [Member]      
Segment Reporting Information [Line Items]      
Service Operations Net Income (loss) 24,469dre_ServiceOperationsNetIncomeloss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dre_ServiceOperationsMember
22,763dre_ServiceOperationsNetIncomeloss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dre_ServiceOperationsMember
20,201dre_ServiceOperationsNetIncomeloss
/ us-gaap_ConsolidationItemsAxis
= us-gaap_OperatingSegmentsMember
/ us-gaap_StatementBusinessSegmentsAxis
= dre_ServiceOperationsMember
Segment Reconciling Items [Member]      
Segment Reporting Information [Line Items]      
Sold Properties Included in Continuing Operations Net Operating Income 19,435dre_SoldPropertiesIncludedinContinuingOperationsNetOperatingIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
41,336dre_SoldPropertiesIncludedinContinuingOperationsNetOperatingIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
41,479dre_SoldPropertiesIncludedinContinuingOperationsNetOperatingIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
Straight line rent adjustments, net 20,474dre_Straightlinerentadjustmentsnet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
12,749dre_Straightlinerentadjustmentsnet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
17,899dre_Straightlinerentadjustmentsnet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
Gain (Loss) on Contract Termination 5,246us-gaap_GainLossOnContractTermination
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
11,151us-gaap_GainLossOnContractTermination
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
6,926us-gaap_GainLossOnContractTermination
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
Amortization of lease incentives and market rents (5,345)dre_Amortizationofleaseincentivesandmarketrents
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
(8,323)dre_Amortizationofleaseincentivesandmarketrents
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
(7,928)dre_Amortizationofleaseincentivesandmarketrents
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
Intercompany rents and other adjusting items (4,219)dre_Intercompanyrentsandotheradjustingitems
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
(4,462)dre_Intercompanyrentsandotheradjustingitems
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
(4,704)dre_Intercompanyrentsandotheradjustingitems
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
Corporate, Non-Segment [Member]      
Segment Reporting Information [Line Items]      
Income (Loss) from Equity Method Investments 94,317us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
54,116us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
4,674us-gaap_IncomeLossFromEquityMethodInvestments
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Interest Expense (219,613)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(228,324)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(229,417)us-gaap_InterestExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Depreciation, Depletion and Amortization, Nonproduction (384,412)us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(392,627)us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(348,268)us-gaap_DepreciationAndAmortization
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal 162,715us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
59,179us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
344us-gaap_DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Impairment Charges (49,106)us-gaap_AssetImpairmentCharges
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(3,777)us-gaap_AssetImpairmentCharges
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
0us-gaap_AssetImpairmentCharges
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Other Nonoperating Income (Expense) 1,246us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
1,887us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
514us-gaap_OtherNonoperatingIncomeExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Other Operating Income (Expense), Net (229)us-gaap_OtherOperatingIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
470us-gaap_OtherOperatingIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(633)us-gaap_OtherOperatingIncomeExpenseNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
General and Administrative Expense (49,362)us-gaap_GeneralAndAdministrativeExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(42,673)us-gaap_GeneralAndAdministrativeExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(46,424)us-gaap_GeneralAndAdministrativeExpense
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Gain on land sales 10,441dre_EarningsFromSalesOfLand
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
9,547dre_EarningsFromSalesOfLand
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
0dre_EarningsFromSalesOfLand
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Undeveloped land carrying costs (6,962)dre_UndevelopedLandCarryingCosts
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(8,614)dre_UndevelopedLandCarryingCosts
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(8,829)dre_UndevelopedLandCarryingCosts
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Gains (Losses) on Extinguishment of Debt (283)us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(9,433)us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
0us-gaap_GainsLossesOnExtinguishmentOfDebt
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Acquisition-related activity (1,099)dre_Acquisitionrelatedactivity
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(3,093)dre_Acquisitionrelatedactivity
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
(4,192)dre_Acquisitionrelatedactivity
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
Other Non-segment Income $ (421)dre_OtherNonSegmentIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
$ 1,027dre_OtherNonSegmentIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember
$ 3,728dre_OtherNonSegmentIncome
/ us-gaap_ConsolidationItemsAxis
= us-gaap_CorporateNonSegmentMember