Accumulated Other Comprehensive Income (Changes in AOCI) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2024 USD ($)
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	$ 2,635,105
Ending Balance	2,711,790
Derivative Instruments
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	22,842
Other Comprehensive Income Before Reclassifications	5,196
Amounts Reclassified from Accumulated Other Comprehensive Income	(18,139)
Net Current Period Other Comprehensive Loss	(12,943)
Ending Balance	9,899
Comprehensive (Loss) Income Attributable to Noncontrolling Interest of the Company
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(570)
Other Comprehensive Income Before Reclassifications	304
Amounts Reclassified from Accumulated Other Comprehensive Income	0
Net Current Period Other Comprehensive Loss	304
Ending Balance	(266)
Accumulated Other Comprehensive Income of the Company
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	22,272
Other Comprehensive Income Before Reclassifications	5,500
Amounts Reclassified from Accumulated Other Comprehensive Income	(18,139)
Net Current Period Other Comprehensive Loss	(12,639)
Ending Balance	9,633
First Industrial, L.P. | Accumulated Other Comprehensive Income of the Operating Partnership
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	22,842
Other Comprehensive Income Before Reclassifications	5,196
Amounts Reclassified from Accumulated Other Comprehensive Income	(18,139)
Net Current Period Other Comprehensive Loss	(12,943)
Ending Balance	$ 9,899