CONSOLIDATED STATEMENT OF CHANGES IN EQUITY/ PARTNERS' CAPITAL - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Distributions in Excess of Accumulated Earnings)	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests	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 Income (Loss)	First Industrial, L.P. Noncontrolling Interests
Beginning Balance at Dec. 31, 2021	$ 2,248,372	$ 1,317	$ 2,376,026	$ (178,293)	$ (4,238)	$ 53,560
Beginning Balance at Dec. 31, 2021							$ 2,257,607	$ 2,175,549	$ 81,435	$ (4,331)	$ 4,954
Increase (Decrease) in Equity / Partners' Capital [Roll Forward]
Net Income	37,123			36,258		865	37,123	36,237	868		18
Other Comprehensive Income (Loss)	11,197				10,935	262	11,197			11,197
Issuance of Common Stock/Contribution of General Partner Units, Net of Issuance Costs	12,746	2	12,744				12,746	12,746
Stock Based Compensation Activity	2,721	1	(198)	(1,483)		4,401
Stock Based Compensation Activity							2,721	(1,680)	4,401
Common Stock Dividends and Unit Distributions	(39,887)			(39,009)		(878)
Unit Distributions							(39,887)	(39,009)	(878)
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0	36			(36)	0	36	(36)
Reallocation - Additional Paid-in Capital	0		12			(12)
Reallocation - Other Comprehensive Income	0				6	(6)
Contributions from Noncontrolling Interests	103					103	112				112
Distributions to Noncontrolling Interests							(40)				(40)
Ending Balance at Mar. 31, 2022	2,272,375	1,320	2,388,620	(182,527)	6,703	58,259
Ending Balance at Mar. 31, 2022							2,281,579	2,183,879	85,790	6,866	5,044
Beginning Balance at Dec. 31, 2022	2,530,299	1,321	2,401,334	23,131	33,412	71,101
Beginning Balance at Dec. 31, 2022							2,539,580	2,395,601	95,015	34,186	14,778
Increase (Decrease) in Equity / Partners' Capital [Roll Forward]
Net Income	60,775			55,967		4,808	60,775	55,947	1,447		3,381
Other Comprehensive Income (Loss)	(12,918)				(12,592)	(326)	(12,918)			(12,918)
Stock Based Compensation Activity	4,627	1	(412)	(710)		5,748
Stock Based Compensation Activity							4,627	(1,121)	5,748
Common Stock Dividends and Unit Distributions	(43,460)			(42,401)		(1,059)
Unit Distributions							(43,460)	(42,401)	(1,059)
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0	513			(513)	0	513	(513)
Reallocation - Additional Paid-in Capital	0		(1,166)			1,166
Reallocation - Other Comprehensive Income	0				(88)	88
Contributions from Noncontrolling Interests							1				1
Distributions to Noncontrolling Interests	(11,358)					(11,358)	(11,359)				(11,359)
Ending Balance at Mar. 31, 2023	$ 2,527,965	$ 1,322	$ 2,400,269	$ 35,987	$ 20,732	$ 69,655
Ending Balance at Mar. 31, 2023							$ 2,537,246	$ 2,408,539	$ 100,638	$ 21,268	$ 6,801