CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS EQUITY/PARTNERS' CAPITAL - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in-Capital	Distributions in Excess of Accumulated Earnings	Accumulated Other Comprehensive Loss	Treasury Shares At Cost	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, 2013												$ 1,095
Increase (Decrease) in Stockholders' Equity / Partners' Capital [Roll Forward]
Conversion of Units / Limited Partner Units to Common Stock / General Partner Units	$ 0	$ 2	$ 1,695				$ (1,697)	$ 0	$ 1,697	$ (1,697)
Reallocation - Additional Paid-in-Capital							(48)
Contributions from Noncontrolling Interest												57
Distributions to Noncontrolling Interest							(1,368)					(388)
Net Income	31,466							31,573
Other Comprehensive Loss							16
Ending Balance at Sep. 30, 2014												814
Beginning Balance at Dec. 31, 2014	1,090,827	1,149	1,872,336	$ (670,650)	$ (13,867)	$ (140,018)	41,877
Beginning Balance at Dec. 31, 2014								1,101,590	1,034,129	80,757	$ (14,376)	1,080
Increase (Decrease) in Stockholders' Equity / Partners' Capital [Roll Forward]
Stock Based Compensation Activity	3,474	2	3,923	(451)
Stock Based Compensation Activity								3,474	3,474
Conversion of Units / Limited Partner Units to Common Stock / General Partner Units	0	0	106				(106)	0	106	(106)
Reallocation - Additional Paid-in-Capital	0		(107)				107
Common Stock and Unit Distributions	(44,283)			(42,614)			(1,669)
Common Unit Distributions								(44,283)	(42,614)	(1,669)
Contributions from Noncontrolling Interest								61				61
Distributions to Noncontrolling Interest							(1,669)	(85)				(85)
Net Income	31,499			30,302			1,197	31,614	30,342	1,197		75
Other Comprehensive Loss	(1,783)				(1,718)		(65)	(1,824)			(1,824)
Ending Balance at Sep. 30, 2015	$ 1,079,734	$ 1,151	$ 1,876,258	$ (683,413)	$ (15,585)	$ (140,018)	$ 41,341
Ending Balance at Sep. 30, 2015								$ 1,090,547	$ 1,025,437	$ 80,179	$ (16,200)	$ 1,131