Accumulated Other Comprehensive Income (Changes in AOCI) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2023 USD ($)
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	$ 2,530,299
Ending Balance	2,606,703
Derivative Instruments
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	34,186
Other Comprehensive Income Before Reclassifications	27,728
Amounts Reclassified from Accumulated Other Comprehensive Income	(15,068)
Net Current Period Other Comprehensive Income	12,660
Ending Balance	46,846
Comprehensive (Loss) Income Attributable to Noncontrolling Interest of the Company
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(774)
Other Comprehensive Income Before Reclassifications	(398)
Amounts Reclassified from Accumulated Other Comprehensive Income	0
Net Current Period Other Comprehensive Income	(398)
Ending Balance	(1,172)
Accumulated Other Comprehensive Income of the Company
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	33,412
Other Comprehensive Income Before Reclassifications	27,330
Amounts Reclassified from Accumulated Other Comprehensive Income	(15,068)
Net Current Period Other Comprehensive Income	12,262
Ending Balance	45,674
First Industrial, L.P. | Accumulated Other Comprehensive Income of the Operating Partnership
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	34,186
Other Comprehensive Income Before Reclassifications	27,728
Amounts Reclassified from Accumulated Other Comprehensive Income	(15,068)
Net Current Period Other Comprehensive Income	12,660
Ending Balance	$ 46,846