Accumulated Other Comprehensive Income (Changes in AOCI) (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2023 USD ($)
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	$ 2,530,299
Ending Balance	2,561,839
Derivative Instruments
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	34,186
Other Comprehensive Income Before Reclassifications	14,189
Amounts Reclassified from Accumulated Other Comprehensive Income	(9,168)
Net Current Period Other Comprehensive Income	5,021
Ending Balance	39,207
Comprehensive (Loss) Income Attributable to Noncontrolling Interest of the Company
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	(774)
Other Comprehensive Income Before Reclassifications	(214)
Amounts Reclassified from Accumulated Other Comprehensive Income	0
Net Current Period Other Comprehensive Income	(214)
Ending Balance	(988)
Accumulated Other Comprehensive Income of the Company
Accumulated Other Comprehensive Income [Line Items]
Beginning Balance	33,412
Other Comprehensive Income Before Reclassifications	13,975
Amounts Reclassified from Accumulated Other Comprehensive Income	(9,168)
Net Current Period Other Comprehensive Income	4,807
Ending Balance	38,219
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	14,189
Amounts Reclassified from Accumulated Other Comprehensive Income	(9,168)
Net Current Period Other Comprehensive Income	5,021
Ending Balance	$ 39,207