Consolidated Balance Sheets Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accounts receivable, allowance	$ 1,709	$ 1,391
Straight-line rent receivable, allowance	5,254	5,268
Deferred leasing and other costs, accumulated amortization	209,451	186,798
Debt Issuance Costs, Net	$ 21,114	$ 23,052
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	600,000,000	600,000,000
Common shares, shares issued	356,361,000	354,756,000
Common shares, shares outstanding	356,361,000	354,756,000
Duke Realty Limited Partnership [Member]
Accounts receivable, allowance	$ 1,709	$ 1,391
Straight-line rent receivable, allowance	5,254	5,268
Deferred leasing and other costs, accumulated amortization	$ 209,451	$ 186,798
Common equity, General Partner Units issued	356,361,000	354,756,000
Common equity, General Partner Units outstanding	356,361,000	354,756,000
Limited Partner Units issued	3,283,000	3,408,000
Limited Partner Units outstanding	3,283,000	3,408,000
Secured Debt [Member]
Debt Issuance Costs, Net	$ 614	$ 969
Secured Debt [Member] | Duke Realty Limited Partnership [Member]
Debt Issuance Costs, Net	614	969
Unsecured Debt [Member]
Debt Issuance Costs, Net	20,500	22,083
Unsecured Debt [Member] | Duke Realty Limited Partnership [Member]
Debt Issuance Costs, Net	$ 20,500	$ 22,083