CONSOLIDATED STATEMENT OF CHANGES IN EQUITY/ PARTNERS' CAPITAL - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained 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, 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
Beginning Balance at Dec. 31, 2023	2,635,105	1,323	2,411,673	127,707	22,272	72,130
Beginning Balance at Dec. 31, 2023							2,644,388	2,505,150	109,003	22,842	7,393
Increase (Decrease) in Equity / Partners' Capital [Roll Forward]
Net Income	70,498			68,452		2,046	70,498	68,404	1,871		223
Other Comprehensive Income (Loss)	10,423				10,146	277	10,423			10,423
Stock Based Compensation Activity	7,674	0	(323)	(6)		8,003
Stock Based Compensation Activity							7,674	(329)	8,003
Common Stock Dividends and Unit Distributions	(50,309)			(49,049)		(1,260)
Unit Distributions							(50,309)	(49,049)	(1,260)
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0	7			(7)	0	7	(7)
Retirement of Limited Partner Units	(25)					(25)	(25)		(25)
Reallocation - Additional Paid-in Capital	0		3,007			(3,007)
Reallocation - Other Comprehensive Income	0				(44)	44
Contributions from Noncontrolling Interests							5				5
Distributions to Noncontrolling Interests	(98)					(98)	(113)				(113)
Ending Balance at Mar. 31, 2024	$ 2,673,268	$ 1,323	$ 2,414,364	$ 147,104	$ 32,374	$ 78,103
Ending Balance at Mar. 31, 2024							$ 2,682,541	$ 2,524,183	$ 117,585	$ 33,265	$ 7,508