v3.26.3
Accumulated Other Comprehensive Income (Changes in AOCI) (Details)
$ in Thousands
 9 Months Ended
Sep. 30, 2026
USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance $ 2,758,930
Ending Balance 2,870,218
Derivative Instruments  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance 3,256
Other Comprehensive Income (Loss) Before Reclassifications 19,062
Amounts Reclassified from Accumulated Other Comprehensive Income (4,355)
Net Current Period Other Comprehensive Income 14,707
Ending Balance 17,963
Comprehensive (Loss) Income Attributable to Noncontrolling Interest of the Company  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance (97)
Other Comprehensive Income (Loss) Before Reclassifications (488)
Amounts Reclassified from Accumulated Other Comprehensive Income 0
Net Current Period Other Comprehensive Income (488)
Ending Balance (585)
Accumulated Other Comprehensive Income of the Company  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance 3,159
Other Comprehensive Income (Loss) Before Reclassifications 18,574
Amounts Reclassified from Accumulated Other Comprehensive Income (4,355)
Net Current Period Other Comprehensive Income 14,219
Ending Balance 17,378
First Industrial, L.P. | Accumulated Other Comprehensive Income of the Operating Partnership  
Accumulated Other Comprehensive Income (Loss) [Line Items]  
Beginning Balance 3,256
Other Comprehensive Income (Loss) Before Reclassifications 19,062
Amounts Reclassified from Accumulated Other Comprehensive Income (4,355)
Net Current Period Other Comprehensive Income 14,707
Ending Balance $ 17,963