v3.25.4
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, 2025
Dec. 31, 2024
Dec. 31, 2023
Numerator:      
Net Income Available to Common Stockholders / Unitholders $ 247,297 $ 287,343 $ 274,584
Denominator:      
Weighted Average Shares/Units - Basic 132,446 132,369 132,264
Performance Units/Performance Units and certain Performance RLP Units 68 47 77
Weighted Average Shares / Units - Diluted 132,514 132,416 132,341
Basic Earnings Per Share / Unit:      
Net Income Available to Common Stockholders/Unitholders $ 1.87 $ 2.17 $ 2.08
Diluted Earnings Per Share / Unit:      
Net Income Available to Common Stockholders/Unitholders $ 1.87 $ 2.17 $ 2.07
First Industrial, L.P.      
Numerator:      
Net Income Available to Common Stockholders / Unitholders $ 254,550 $ 294,670 $ 281,150
Denominator:      
Weighted Average Shares/Units - Basic 135,466 135,092 134,777
Performance Units/Performance Units and certain Performance RLP Units 572 334 472
Weighted Average Shares / Units - Diluted 136,038 135,426 135,249
Basic Earnings Per Share / Unit:      
Net Income Available to Common Stockholders/Unitholders $ 1.88 $ 2.18 $ 2.09
Diluted Earnings Per Share / Unit:      
Net Income Available to Common Stockholders/Unitholders $ 1.87 $ 2.18 $ 2.08