Net Income (Loss) Per Common Share Reconciling the Components of Basic and Diluted Net Income (Loss) per Common Share (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 19,456	$ 44,551
Less: dividends on participating securities	(356)	(388)
Basic net income attributable to common shareholders	19,100	44,163
Add back dividends on dilutive participating securities	0	0
Noncontrolling interest in earnings of common unitholders	170	382
Diluted net income attributable to common shareholders	$ 19,270	$ 44,545
Weighted average number of common shares/units outstanding, Basic	368,190	359,139
Weighted average Limited Partner Units outstanding	3,224	3,065
Other potential dilutive shares/units	456	158
Weighted average number of common shares/units and potential dilutive securities	371,870	362,362
Duke Realty Limited Partnership [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 19,626	$ 44,933
Less: dividends on participating securities	(356)	(388)
Basic net income attributable to common unitholders	19,270	44,545
Add back dividends on dilutive participating securities	0	0
Diluted net income attributable to common unitholders	$ 19,270	$ 44,545
Weighted average number of common shares/units outstanding, Basic	371,414	362,204
Other potential dilutive shares/units	456	158
Weighted average number of common shares/units and potential dilutive securities	371,870	362,362

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