Net Income (Loss) Per Common Share Reconciling the Components of Basic and Diluted Net Income (Loss) per Common Share (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to common shareholders/unitholders, Basic	$ 65,244	$ 18,683
Less: Dividends on Participating Securities	(620)	(645)
Basic Net Income (Loss) Attributable To Common Stockholders, Basic	64,624	18,038
Noncontrolling Interest in Net Income (Loss) Operating Partnerships, Redeemable	699	250
Diluted Net Income (Loss) Attributable to Common Stockholders	65,323	18,288
Weighted average number of common shares/units outstanding, Basic	344,597	327,106
Weighted Average Limited Partnership Units Outstanding, Basic	3,695	4,387
Other potential dilutive shares/units	361	223
Weighted average number of common shares/units and potential dilutive securities	348,653	331,716
Duke Realty Limited Partnership [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income (loss) attributable to common shareholders/unitholders, Basic	65,943	18,933
Less: Dividends on Participating Securities	(620)	(645)
Basic Net Income (Loss) Attributable To Common Stockholders, Basic	$ 65,323	$ 18,288
Weighted average number of common shares/units outstanding, Basic	348,292	331,493
Other potential dilutive shares/units	361	223
Weighted average number of common shares/units and potential dilutive securities	348,653	331,716