Consolidated Balance Sheets Consolidated Balance Sheet (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Accounts receivable, allowance	$ 868	$ 1,709
Straight-line rent receivable, allowance	4,953	5,254
Deferred leasing and other costs, accumulated amortization	200,744	209,451
Debt Issuance Costs, Net	$ 26,300	$ 21,114
Common shares, par value	$ 0.01	$ 0.01
Common shares, shares authorized	600,000,000	600,000,000
Common shares, shares issued	358,851,000	356,361,000
Common shares, shares outstanding	358,851,000	356,361,000
Duke Realty Limited Partnership [Member]
Accounts receivable, allowance	$ 868	$ 1,709
Straight-line rent receivable, allowance	4,953	5,254
Deferred leasing and other costs, accumulated amortization	$ 200,744	$ 209,451
Common equity, General Partner Units issued	358,851,000	356,361,000
Common equity, General Partner Units outstanding	358,851,000	356,361,000
Limited Partner Units issued	2,920,000	3,283,000
Limited Partner Units outstanding	2,920,000	3,283,000
Secured Debt [Member]
Debt Issuance Costs, Net	$ 238	$ 614
Secured Debt [Member] | Duke Realty Limited Partnership [Member]
Debt Issuance Costs, Net	238	614
Unsecured Debt [Member]
Debt Issuance Costs, Net	26,062	20,500
Unsecured Debt [Member] | Duke Realty Limited Partnership [Member]
Debt Issuance Costs, Net	$ 26,062	$ 20,500