Accumulated Other Comprehensive Income (Changes in AOCI) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ 2,635,105	$ 2,530,299
Ending Balance	2,746,028	2,635,105
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	22,842	34,186
Other Comprehensive Income (Loss), Before Reclassifications	20,410	9,829
Amounts Reclassified from Accumulated Other Comprehensive (Income) Loss	(22,767)	(21,173)
Net Current Period Other Comprehensive Income (Loss)	(2,357)	(11,344)
Ending Balance	20,485	22,842
Comprehensive Income (Loss) Attributable to Noncontrolling Interest of the Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(570)	(774)
Other Comprehensive Income (Loss), Before Reclassifications	21	204
Amounts Reclassified from Accumulated Other Comprehensive (Income) Loss	0	0
Net Current Period Other Comprehensive Income (Loss)	21	204
Ending Balance	(549)	(570)
Accumulated Other Comprehensive Income (Loss) of the Company
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	22,272	33,412
Other Comprehensive Income (Loss), Before Reclassifications	20,431	10,033
Amounts Reclassified from Accumulated Other Comprehensive (Income) Loss	(22,767)	(21,173)
Net Current Period Other Comprehensive Income (Loss)	(2,336)	(11,140)
Ending Balance	19,936	22,272
First Industrial, L.P. | Accumulated Other Comprehensive Income/Loss of the Operating Partnership
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	22,842	34,186
Other Comprehensive Income (Loss), Before Reclassifications	20,410	9,829
Amounts Reclassified from Accumulated Other Comprehensive (Income) Loss	(22,767)	(21,173)
Net Current Period Other Comprehensive Income (Loss)	(2,357)	(11,344)
Ending Balance	$ 20,485	$ 22,842