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, 2021	Mar. 31, 2020
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 79,362	$ 19,456
Less: dividends on participating securities	(371)	(356)
Basic net income attributable to common shareholders	78,991	19,100
Add back dividends on dilutive participating securities	0	0
Noncontrolling interest in earnings of common unitholders	761	170
Diluted net income attributable to common shareholders	$ 79,752	$ 19,270
Weighted average number of common shares/units outstanding, Basic	373,667	368,190
Weighted average Limited Partner Units outstanding	3,575	3,224
Other potential dilutive shares/units	502	456
Weighted average number of common shares/units and potential dilutive securities	377,744	371,870
Duke Realty Limited Partnership [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Net income attributable to common shareholders	$ 80,123	$ 19,626
Less: dividends on participating securities	(371)	(356)
Basic net income attributable to common unitholders	79,752	19,270
Add back dividends on dilutive participating securities	0	0
Diluted net income attributable to common unitholders	$ 79,752	$ 19,270
Weighted average number of common shares/units outstanding, Basic	377,242	371,414
Other potential dilutive shares/units	502	456
Weighted average number of common shares/units and potential dilutive securities	377,744	371,870