v3.26.3
Earnings Per Share / Unit (EPS / EPU) - Computation of Basic and Diluted EPS / EPU (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Numerator:        
Net Income Available to Common Stockholders / Unitholders $ 58,517 $ 65,269 $ 278,613 $ 168,486
Denominator:        
Weighted Average Shares / Units - Basic 132,612 132,450 132,597 132,432
Performance Units (See Note 9) / Performance Units and certain Performance RLP Units (See Note 6) 74 54 68 60
Weighted Average Shares / Units - Diluted 132,686 132,504 132,665 132,492
Earnings Per Share/Unit, Basic [Abstract]        
Net Income Available to Common Stockholders / Unitholders - Basic $ 0.44 $ 0.49 $ 2.10 $ 1.27
Earnings Per Share/Unit, Diluted [Abstract]        
Net Income Available to Common Stockholders / Unitholders - Diluted $ 0.44 $ 0.49 $ 2.10 $ 1.27
First Industrial, L.P.        
Numerator:        
Net Income Available to Common Stockholders / Unitholders $ 60,385 $ 67,188 $ 287,612 $ 173,422
Denominator:        
Weighted Average Shares / Units - Basic 135,943 135,479 135,931 135,461
Performance Units (See Note 9) / Performance Units and certain Performance RLP Units (See Note 6) 611 441 576 512
Weighted Average Shares / Units - Diluted 136,554 135,920 136,507 135,973
Earnings Per Share/Unit, Basic [Abstract]        
Net Income Available to Common Stockholders / Unitholders - Basic $ 0.44 $ 0.50 $ 2.12 $ 1.28
Earnings Per Share/Unit, Diluted [Abstract]        
Net Income Available to Common Stockholders / Unitholders - Diluted $ 0.44 $ 0.49 $ 2.11 $ 1.28