Earnings Per Share / Unit (EPS / EPU) - Computation of Basic and Diluted EPS / EPU (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator:
Net Income Available to Common Stockholders / Unitholders	$ 274,584	$ 358,786	$ 270,698
Denominator:
Weighted Average Shares/Units - Basic	132,264	132,024	129,688
Performance Units/Performance Units and certain Performance RLP Units	77	79	87
Weighted Average Shares / Units - Diluted	132,341	132,103	129,775
Basic Earnings Per Share / Unit:
Net Income Available to Common Stockholders/Unitholders	$ 2.08	$ 2.72	$ 2.09
Diluted Earnings Per Share / Unit:
Net Income Available to Common Stockholders/Unitholders	$ 2.07	$ 2.72	$ 2.09
First Industrial, L.P.
Numerator:
Net Income Available to Common Stockholders / Unitholders	$ 281,150	$ 366,642	$ 276,268
Denominator:
Weighted Average Shares/Units - Basic	134,777	134,229	131,740
Performance Units/Performance Units and certain Performance RLP Units	472	452	497
Weighted Average Shares / Units - Diluted	135,249	134,681	132,237
Basic Earnings Per Share / Unit:
Net Income Available to Common Stockholders/Unitholders	$ 2.09	$ 2.73	$ 2.10
Diluted Earnings Per Share / Unit:
Net Income Available to Common Stockholders/Unitholders	$ 2.08	$ 2.72	$ 2.09