CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 295,988	$ 285,837	$ 381,612
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation	139,202	130,427	119,477
Amortization of Debt Issuance Costs	3,646	3,626	3,187
Other Amortization, Including Equity Based Compensation	37,091	34,088	32,845
Equity in Income of Joint Ventures	(4,295)	(32,207)	(114,942)
Distributions from Joint Ventures	2,945	7,400	118,034
Gain on Sale of Real Estate	(111,970)	(95,650)	(128,268)
Gain on Involuntary Conversion	0	0	(1,495)
Straight-line Rental Income and Expense, Net	(20,801)	(21,925)	(25,962)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	(710)	(2,363)	(4,852)
Increase (Decrease) in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	11,392	(4,418)	31,307
Net Cash Provided by Operating Activities	352,488	304,815	410,943
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	(73,861)	(131,057)	(305,326)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	(215,565)	(361,927)	(522,368)
Net Proceeds from Sales of Investments in Real Estate	158,924	120,411	175,409
(Increase) Decrease in Escrow Deposits	(150)	3,877	(450)
Proceeds from Involuntary Conversion	0	0	1,495
Contributions to and Investments in Joint Ventures	(5,729)	(12,349)	(5,616)
Distributions from Joint Ventures	0	0	29,356
Other Investing Activity	4,761	2,739	(1,608)
Net Cash Used in Investing Activities	(131,620)	(378,306)	(629,108)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing and Equity Issuance Costs	0	(61)	(5,265)
Proceeds from the Issuance of Common Stock/Contribution of General Partner Units	0	0	12,823
Income Taxes Paid on Vested Equity Compensation	(2,070)	(2,510)	(2,942)
Common Stock Dividends and Unit Distributions Paid	(193,482)	(169,368)	(155,333)
Contributions from Noncontrolling Interests	0	0	103
Distributions to Noncontrolling Interests	(143)	(11,523)	(4,418)
Repayments on Mortgage Loans Payable	(335)	(321)	(69,465)
Proceeds from Unsecured Term Loans	0	0	465,000
Proceeds from Unsecured Credit Facility	321,000	374,000	720,000
Repayments on Unsecured Credit Facility	(338,000)	(218,000)	(656,000)
Net Cash (Used in) Provided by Financing Activities	(213,030)	(27,783)	304,503
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	7,838	(101,274)	86,338
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	43,844	145,118	58,780
Cash, Cash Equivalents and Restricted Cash, End of Year	51,682	43,844	145,118
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Paid, Net of Interest Expense Capitalized	82,871	72,881	46,445
Interest Expense Capitalized in Connection with Development Activity and Joint Venture Investment	8,283	13,791	16,298
Income Taxes Paid	5,299	27,754	3,760
Cash Paid for Operating Lease Liabilities	3,539	3,348	3,444
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets	658	941	949
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	51,189	44,201	41,259
Exchange of Limited Partner Units for Common Stock/General Partner Units
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0	0
Assumption of Liabilities in Connection with the Acquisition of Real Estate	682	528	2,115
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	46,257	55,876	86,456
Improvements Funded by Tenant	1,069	3,878	610
Write-off of Fully Depreciated Assets	(33,909)	(33,529)	(35,716)
Noncontrolling Interests
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	8,434	11,021	22,478
Exchange of Limited Partner Units for Common Stock/General Partner Units
Conversion of Limited Partner Units to Common Stock / General Partner Units	(67)	(1,332)	(2,444)
Common Stock
Exchange of Limited Partner Units for Common Stock/General Partner Units
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0	1
Additional Paid-in Capital
Exchange of Limited Partner Units for Common Stock/General Partner Units
Conversion of Limited Partner Units to Common Stock / General Partner Units	67	1,332	2,443
First Industrial, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	295,988	285,837	381,612
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation	139,202	130,427	119,477
Amortization of Debt Issuance Costs	3,646	3,626	3,187
Other Amortization, Including Equity Based Compensation	37,091	34,088	32,845
Equity in Income of Joint Ventures	(4,295)	(32,207)	(114,942)
Distributions from Joint Ventures	2,945	7,400	118,034
Gain on Sale of Real Estate	(111,970)	(95,650)	(128,268)
Gain on Involuntary Conversion	0	0	(1,495)
Straight-line Rental Income and Expense, Net	(20,801)	(21,925)	(25,962)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	(656)	(2,365)	(4,898)
Increase (Decrease) in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	11,392	(4,418)	31,307
Net Cash Provided by Operating Activities	352,542	304,813	410,897
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	(73,861)	(131,057)	(305,326)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	(215,565)	(361,927)	(522,368)
Net Proceeds from Sales of Investments in Real Estate	158,924	120,411	175,409
(Increase) Decrease in Escrow Deposits	(150)	3,877	(450)
Proceeds from Involuntary Conversion	0	0	1,495
Contributions to and Investments in Joint Ventures	(5,729)	(12,349)	(5,616)
Distributions from Joint Ventures	0	0	29,356
Other Investing Activity	4,761	2,739	(1,608)
Net Cash Used in Investing Activities	(131,620)	(378,306)	(629,108)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing and Equity Issuance Costs	0	(61)	(5,265)
Proceeds from the Issuance of Common Stock/Contribution of General Partner Units	0	0	12,823
Income Taxes Paid on Vested Equity Compensation	(2,070)	(2,510)	(2,942)
Common Stock Dividends and Unit Distributions Paid	(193,482)	(169,368)	(155,333)
Contributions from Noncontrolling Interests	42	30	242
Distributions to Noncontrolling Interests	(239)	(11,551)	(4,511)
Repayments on Mortgage Loans Payable	(335)	(321)	(69,465)
Proceeds from Unsecured Term Loans	0	0	465,000
Proceeds from Unsecured Credit Facility	321,000	374,000	720,000
Repayments on Unsecured Credit Facility	(338,000)	(218,000)	(656,000)
Net Cash (Used in) Provided by Financing Activities	(213,084)	(27,781)	304,549
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	7,838	(101,274)	86,338
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	43,844	145,118	58,780
Cash, Cash Equivalents and Restricted Cash, End of Year	51,682	43,844	145,118
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Paid, Net of Interest Expense Capitalized	82,871	72,881	46,445
Interest Expense Capitalized in Connection with Development Activity and Joint Venture Investment	8,283	13,791	16,298
Income Taxes Paid	5,299	27,754	3,760
Cash Paid for Operating Lease Liabilities	3,539	3,348	3,444
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets	658	941	949
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	51,189	44,201	41,259
Exchange of Limited Partner Units for Common Stock/General Partner Units
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0	0
Assumption of Liabilities in Connection with the Acquisition of Real Estate	682	528	2,115
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	46,257	55,876	86,456
Improvements Funded by Tenant	1,069	3,878	610
Write-off of Fully Depreciated Assets	(33,909)	(33,529)	(35,716)
First Industrial, L.P. | Limited Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	7,898	7,073	8,474
Exchange of Limited Partner Units for Common Stock/General Partner Units
Conversion of Limited Partner Units to Common Stock / General Partner Units	(67)	(1,332)	(2,444)
First Industrial, L.P. | General Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	287,346	274,628	359,045
Exchange of Limited Partner Units for Common Stock/General Partner Units
Conversion of Limited Partner Units to Common Stock / General Partner Units	$ 67	$ 1,332	$ 2,444