CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 67,364	$ 102,173	$ 177,127	$ 225,547
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation			110,137	104,077
Amortization of Debt Issuance Costs	1,393	911	3,684	2,735
Other Amortization, Including Equity Based Compensation			36,709	27,404
Equity in Income of Joint Venture	(387)	(599)	(3,800)	(3,161)
Distributions from the Joint Venture			23,068	2,236
Gain on Sale of Real Estate	(9,538)	(56,814)	(17,503)	(93,801)
Payments to Settle Derivative Instruments			(250)	0
Straight-line Rental Income and Expense, Net			(11,111)	(12,151)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net			(11,228)	(5,013)
Increase in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits			32,395	27,835
Net Cash Provided by Operating Activities			339,228	275,708
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate			(172,585)	(44,384)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs			(210,367)	(159,040)
Net Proceeds from Sales of Investments in Real Estate			25,329	135,544
Contributions to and Investments in Joint Venture			(4,367)	(3,942)
Other Investing Activity			1,046	4,317
Net Cash Used in Investing Activities			(360,944)	(67,505)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing Issuance Costs			(12,508)	0
Income Taxes Paid on Vested Equity Compensation			(1,615)	(2,070)
Common Stock Dividends and Unit Distributions Paid			(170,842)	(143,395)
Repayments on Mortgage Loan Payable			(260)	(250)
Proceeds from the Issuance of Senior Unsecured Notes, Net of Underwriter's Discount			443,768	0
Proceeds from Unsecured Credit Facility			482,000	236,000
Repayments on Unsecured Credit Facility			(731,000)	(287,000)
Distributions to Noncontrolling Interests			(2,703)	(143)
Net Cash Provided by (Used in) Financing Activities			6,840	(196,858)
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash			(14,876)	11,345
Cash, Cash Equivalents and Restricted Cash, Beginning of Year			51,682	43,844
Cash, Cash Equivalents and Restricted Cash, End of Period	36,806	55,189	36,806	55,189
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity			9,374	6,327
Cash Paid for Operating Lease Liabilities			2,377	2,608
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets			3,208	354
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	61,582	50,970	61,582	50,970
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0	0	0
Assumption of Liabilities in Connection with the Acquisition of Real Estate			763	688
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate			62,899	34,310
Improvements Funded by Tenant			1,041	0
Write-off of Fully Depreciated Assets			(38,966)	(26,543)
Noncontrolling Interests
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	2,058	2,810
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(167)	(55)	(268)	(62)
Common Stock
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units			0	0
Additional Paid-in Capital
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	167	55	268	62
First Industrial, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	67,364	102,173	177,127	225,547
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation			110,137	104,077
Amortization of Debt Issuance Costs	1,393	911	3,684	2,735
Other Amortization, Including Equity Based Compensation			36,709	27,404
Equity in Income of Joint Venture	(387)	(599)	(3,800)	(3,161)
Distributions from the Joint Venture			23,068	2,236
Gain on Sale of Real Estate	(9,538)	(56,814)	(17,503)	(93,801)
Payments to Settle Derivative Instruments			(250)	0
Straight-line Rental Income and Expense, Net			(11,111)	(12,151)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net			(11,173)	(4,976)
Increase in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits			32,395	27,835
Net Cash Provided by Operating Activities			339,283	275,745
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate			(172,585)	(44,384)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs			(210,367)	(159,040)
Net Proceeds from Sales of Investments in Real Estate			25,329	135,544
Contributions to and Investments in Joint Venture			(4,367)	(3,942)
Other Investing Activity			1,046	4,317
Net Cash Used in Investing Activities			(360,944)	(67,505)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing Issuance Costs			(12,508)	0
Income Taxes Paid on Vested Equity Compensation			(1,615)	(2,070)
Common Stock Dividends and Unit Distributions Paid			(170,842)	(143,395)
Contributions from Noncontrolling Interests			21	31
Repayments on Mortgage Loan Payable			(260)	(250)
Proceeds from the Issuance of Senior Unsecured Notes, Net of Underwriter's Discount			443,768	0
Proceeds from Unsecured Credit Facility			482,000	236,000
Repayments on Unsecured Credit Facility			(731,000)	(287,000)
Distributions to Noncontrolling Interests			(2,779)	(211)
Net Cash Provided by (Used in) Financing Activities			6,785	(196,895)
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash			(14,876)	11,345
Cash, Cash Equivalents and Restricted Cash, Beginning of Year			51,682	43,844
Cash, Cash Equivalents and Restricted Cash, End of Period	36,806	55,189	36,806	55,189
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity			9,374	6,327
Cash Paid for Operating Lease Liabilities			2,377	2,608
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets			3,208	354
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	61,582	50,970	61,582	50,970
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0	0	0
Assumption of Liabilities in Connection with the Acquisition of Real Estate			763	688
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate			62,899	34,310
Improvements Funded by Tenant			1,041	0
Write-off of Fully Depreciated Assets			(38,966)	(26,543)
First Industrial, L.P. | Limited Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	2,012	2,733
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(167)	(55)	(268)	(62)
First Industrial, L.P. | General Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	65,273	99,332
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	$ 167	$ 55	$ 268	$ 62