v3.26.1
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
Mar. 31, 2026
Mar. 31, 2025
Numerator:    
Net Income Available to Common Stockholders / Unitholders $ 143,038 $ 48,067
Denominator:    
Weighted Average Shares / Units - Basic 132,573 132,415
Performance Units (See Note 9) / Performance Units and certain Performance RLP Units (See Note 6) 67 78
Weighted Average Shares / Units - Diluted 132,640 132,493
Earnings Per Share/Unit, Basic [Abstract]    
Net Income Available to Common Stockholders / Unitholders - Basic $ 1.08 $ 0.36
Earnings Per Share/Unit, Diluted [Abstract]    
Net Income Available to Common Stockholders / Unitholders - Diluted $ 1.08 $ 0.36
First Industrial, L.P.    
Numerator:    
Net Income Available to Common Stockholders / Unitholders $ 147,687 $ 49,462
Denominator:    
Weighted Average Shares / Units - Basic 135,915 135,440
Performance Units (See Note 9) / Performance Units and certain Performance RLP Units (See Note 6) 578 675
Weighted Average Shares / Units - Diluted 136,493 136,115
Earnings Per Share/Unit, Basic [Abstract]    
Net Income Available to Common Stockholders / Unitholders - Basic $ 1.09 $ 0.37
Earnings Per Share/Unit, Diluted [Abstract]    
Net Income Available to Common Stockholders / Unitholders - Diluted $ 1.08 $ 0.36