CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS EQUITY/ PARTNER'S CAPITAL - 3 months ended Mar. 31, 2018 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in- Capital	Distributions in Excess of Accumulated Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest	First Industrial, L.P.	First Industrial, L.P. General Partner Units	First Industrial, L.P. Limited Partner Units	First Industrial, L.P. Accumulated Other Comprehensive Loss	First Industrial, L.P. Noncontrolling Interest
Beginning Balance at Dec. 31, 2017	$ 1,475,877	$ 1,199	$ 1,967,110	$ (541,847)	$ 1,338	$ 48,077
Beginning Balance at Dec. 31, 2017							$ 1,485,995	$ 1,401,583	$ 82,251	$ 1,382	$ 779
Increase (Decrease) in Stockholders' Equity / Partners' Capital [Roll Forward]
Net Income	37,464			36,292		1,172	37,464	36,271	1,172		21
Other Comprehensive Income	6,549				6,366	183	6,549			6,549
Stock Based Compensation Activity	(4,385)	3	(1,106)	(3,282)
Stock Based Compensation Activity							(4,385)	(4,385)
Common Stock Dividends and Unit Distributions	(27,107)			(26,332)		(775)
Unit Distributions							(27,107)	(26,332)	(775)
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	4	5,005			(5,009)	0	5,009	(5,009)
Retirement of Limited Partner Units	(934)					(934)	(934)		(934)
Reallocation - Additional Paid-in-Capital	0		(292)			292
Contributions from Noncontrolling Interest							116				116
Distributions to Noncontrolling Interest							(21)				(21)
Ending Balance at Mar. 31, 2018	$ 1,487,464	$ 1,206	$ 1,970,717	$ (535,169)	$ 7,704	$ 43,006
Ending Balance at Mar. 31, 2018							$ 1,497,677	$ 1,412,146	$ 76,705	$ 7,931	$ 895