Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Cash flows from operating activities:
Net income	$ 59,880	$ 116,591
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	143,922	131,878
Amortization of deferred leasing and other costs	28,141	27,118
Amortization of deferred financing costs	4,477	3,121
Straight-line rental income and expense, net	(8,476)	(10,466)
Impairment charges	5,626	0
Loss on debt extinguishment	32,778	13
Gain on involuntary conversion	(1,283)	(2,259)
Gains on land and depreciated property sales	(15,213)	(33,383)
Third-party construction contracts, net	(3,717)	15,645
Other accrued revenues and expenses, net	11,460	10,021
Equity in earnings in excess of operating distributions received from unconsolidated joint ventures	3,563	(487)
Net cash provided by operating activities	261,158	257,792
Cash flows from investing activities:
Development of real estate investments	(333,212)	(205,315)
Acquisition of buildings and related intangible assets	0	108,201
Acquisition of land and other real estate assets	(95,859)	(200,872)
Second generation tenant improvements, leasing costs and building improvements	(17,062)	(20,463)
Other deferred leasing costs	(17,306)	(11,152)
Other assets	(10,289)	(7,224)
Proceeds from the repayments of notes receivable from property sales	110,000	130,000
Proceeds from land and depreciated property sales, net	34,509	97,526
Proceeds from Equity Method Investment, Distribution, Return of Capital	13	0
Capital contributions and advances to unconsolidated joint ventures	(4,833)	(5,962)
Net cash used for investing activities	(334,039)	(331,663)
Cash flows from financing activities:
Proceeds from issuance of common shares, net	76,678	42,128
Proceeds from unsecured debt	663,123	0
Payments on unsecured debt	(546,972)	0
Proceeds from secured notes payable	18,400	0
Payments on secured indebtedness including principal amortization	(1,906)	(43,502)
Borrowings on line of credit, net	0	222,000
Distributions to common shareholders/unitholders	(173,131)	(154,550)
Distributions to noncontrolling Interest	(1,566)	(1,180)
Tax payments on stock-based compensation awards	(4,051)	(5,469)
Change in book cash overdrafts	(14,444)	15,874
Other Financing Activities	289	(9,920)
Deferred financing costs	(6,374)	0
Net cash provided by financing activities	10,046	65,381
Net decrease in cash, cash equivalents and restricted cash	(62,835)	(8,490)
Cash, cash equivalents and restricted cash at beginning of period	121,431	25,517
Cash, cash equivalents and restricted cash at end of period	58,596	17,027
Noncash activities:
Liabilities and right-of-use assets - operating leases	1,443	37,810
Duke Realty Limited Partnership [Member]
Cash flows from operating activities:
Net income	59,880	116,591
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of buildings and tenant improvements	143,922	131,878
Amortization of deferred leasing and other costs	28,141	27,118
Amortization of deferred financing costs	4,477	3,121
Straight-line rental income and expense, net	(8,476)	(10,466)
Impairment charges	5,626	0
Loss on debt extinguishment	32,778	13
Gain on involuntary conversion	(1,283)	(2,259)
Gains on land and depreciated property sales	(15,213)	(33,383)
Third-party construction contracts, net	(3,717)	15,645
Other accrued revenues and expenses, net	11,460	10,021
Equity in earnings in excess of operating distributions received from unconsolidated joint ventures	3,563	(487)
Net cash provided by operating activities	261,158	257,792
Cash flows from investing activities:
Development of real estate investments	(333,212)	(205,315)
Acquisition of buildings and related intangible assets	0	108,201
Acquisition of land and other real estate assets	(95,859)	(200,872)
Second generation tenant improvements, leasing costs and building improvements	(17,062)	(20,463)
Other deferred leasing costs	(17,306)	(11,152)
Other assets	(10,289)	(7,224)
Proceeds from the repayments of notes receivable from property sales	110,000	130,000
Proceeds from land and depreciated property sales, net	34,509	97,526
Proceeds from Equity Method Investment, Distribution, Return of Capital	13	0
Capital contributions and advances to unconsolidated joint ventures	(4,833)	(5,962)
Net cash used for investing activities	(334,039)	(331,663)
Cash flows from financing activities:
Contributions from the General Partner	76,678	42,128
Proceeds from unsecured debt	663,123	0
Payments on unsecured debt	(546,972)	0
Proceeds from secured notes payable	18,400	0
Payments on secured indebtedness including principal amortization	(1,906)	(43,502)
Borrowings on line of credit, net	0	222,000
Distributions to common shareholders/unitholders	(174,697)	(155,903)
Distributions to noncontrolling Interest	0	173
Tax payments on stock-based compensation awards	(4,051)	(5,469)
Change in book cash overdrafts	(14,444)	15,874
Other Financing Activities	289	(9,920)
Deferred financing costs	(6,374)	0
Net cash provided by financing activities	10,046	65,381
Net decrease in cash, cash equivalents and restricted cash	(62,835)	(8,490)
Cash, cash equivalents and restricted cash at beginning of period	121,431	25,517
Cash, cash equivalents and restricted cash at end of period	58,596	17,027
Noncash activities:
Liabilities and right-of-use assets - operating leases	$ 1,443	$ 37,810