CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 77,139	$ 126,875	$ 194,148	$ 297,674
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation			96,808	88,286
Amortization of Debt Issuance Costs	905	801	2,714	2,287
Other Amortization, Including Equity Based Compensation			25,136	24,779
Equity in Income of Joint Venture	(1,530)	7	(30,598)	(118,182)
Distributions from the Joint Venture			6,584	118,027
Gain on Sale of Real Estate	(34,368)	(83,907)	(47,421)	(84,204)
Straight-line Rental Income and Expense, Net			(15,891)	(16,895)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net			(3,835)	(6,917)
Increase in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits			12,799	41,167
Net Cash Provided by Operating Activities			240,444	346,022
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate			(93,504)	(272,508)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs			(280,536)	(384,004)
Net Proceeds from Sales of Investments in Real Estate			58,440	122,516
Contributions to and Investments in Joint Venture			(10,060)	(2,798)
Distributions from the Joint Venture			0	29,363
Decrease (Increase) in Escrow Deposits and Other Investing Activity			2,780	(4,036)
Net Cash Used in Investing Activities			(322,880)	(511,467)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing and Equity Issuance Costs			(9)	(5,060)
Proceeds from the Issuance of Common Stock, Net of Underwriter's Discount			0	12,823
Tax Paid on Vested Equity Compensation			(2,510)	(2,942)
Common Stock Dividends and Unit Distributions Paid			(126,148)	(115,619)
Contributions from Noncontrolling Interests			0	103
Distributions to Noncontrolling Interests			(11,523)	(4,418)
Repayments on Mortgage Loans Payable			(240)	(69,387)
Proceeds from Unsecured Term Loans			0	165,000
Proceeds from Unsecured Credit Facility			278,000	600,000
Repayments on Unsecured Credit Facility			(146,000)	(322,000)
Net Cash (Used in) Provided by Financing Activities			(8,430)	258,500
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash			(90,866)	93,055
Cash, Cash Equivalents and Restricted Cash, Beginning of Year			145,118	58,780
Cash, Cash Equivalents and Restricted Cash, End of Period	54,252	151,835	54,252	151,835
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity and Joint Venture Investment			11,013	12,551
Cash Paid for Operating Lease Liabilities			2,501	2,571
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets			661	366
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	44,329	40,794	44,329	40,794
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			351	2,085
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate			66,855	112,739
Tenant Improvements Funded by Tenant			3,366	1,680
Write-off of Fully Depreciated Assets			(21,557)	(28,686)
Noncontrolling Interests
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	2,127	2,987
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(396)	(1,441)	(1,060)	(2,712)
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	0	1
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	396	1,441	1,060	2,711
First Industrial, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	77,139	126,875	194,148	297,674
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation			96,808	88,286
Amortization of Debt Issuance Costs	905	801	2,714	2,287
Other Amortization, Including Equity Based Compensation			25,136	24,779
Equity in Income of Joint Venture	(1,530)	7	(30,598)	(118,182)
Distributions from the Joint Venture			6,584	118,027
Gain on Sale of Real Estate	(34,368)	(83,907)	(47,421)	(84,204)
Straight-line Rental Income and Expense, Net			(15,891)	(16,895)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net			(3,851)	(6,974)
Increase in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits			12,799	41,167
Net Cash Provided by Operating Activities			240,428	345,965
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate			(93,504)	(272,508)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs			(280,536)	(384,004)
Net Proceeds from Sales of Investments in Real Estate			58,440	122,516
Contributions to and Investments in Joint Venture			(10,060)	(2,798)
Distributions from the Joint Venture			0	29,363
Decrease (Increase) in Escrow Deposits and Other Investing Activity			2,780	(4,036)
Net Cash Used in Investing Activities			(322,880)	(511,467)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing and Equity Issuance Costs			(9)	(5,060)
Proceeds from the Issuance of Common Stock, Net of Underwriter's Discount			0	12,823
Tax Paid on Vested Equity Compensation			(2,510)	(2,942)
Common Stock Dividends and Unit Distributions Paid			(126,148)	(115,619)
Contributions from Noncontrolling Interests			27	242
Distributions to Noncontrolling Interests			(11,534)	(4,500)
Repayments on Mortgage Loans Payable			(240)	(69,387)
Proceeds from Unsecured Term Loans			0	165,000
Proceeds from Unsecured Credit Facility			278,000	600,000
Repayments on Unsecured Credit Facility			(146,000)	(322,000)
Net Cash (Used in) Provided by Financing Activities			(8,414)	258,557
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash			(90,866)	93,055
Cash, Cash Equivalents and Restricted Cash, Beginning of Year			145,118	58,780
Cash, Cash Equivalents and Restricted Cash, End of Period	54,252	151,835	54,252	151,835
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity and Joint Venture Investment			11,013	12,551
Cash Paid for Operating Lease Liabilities			2,501	2,571
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets			661	366
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	44,329	40,794	44,329	40,794
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			351	2,085
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate			66,855	112,739
Tenant Improvements Funded by Tenant			3,366	1,680
Write-off of Fully Depreciated Assets			(21,557)	(28,686)
First Industrial, L.P. | Limited Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	1,931	2,923
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(396)	(1,441)	(1,060)	(2,712)
First Industrial, L.P. | General Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	74,986	123,866
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	$ 396	$ 1,441	$ 1,060	$ 2,712