CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 56,234	$ 133,676	$ 117,009	$ 170,799
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation			63,849	57,454
Amortization of Debt Issuance Costs	905	730	1,809	1,486
Other Amortization, Including Equity Based Compensation			16,593	16,567
Equity in Income of Joint Venture	(1,434)	(118,211)	(29,068)	(118,189)
Distributions from the Joint Venture			5,740	118,034
Gain on Sale of Real Estate	(13,053)	(297)	(13,053)	(297)
Straight-line Rental Income and Expense, Net			(11,018)	(9,353)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net			(1,537)	(4,600)
Increase in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits			5,785	26,988
Net Cash Provided by Operating Activities			156,109	258,889
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate			(89,914)	(183,344)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs			(171,768)	(250,150)
Net Proceeds from Sales of Investments in Real Estate			16,299	1,268
Contributions to and Investments in Joint Venture			(5,972)	(1,640)
Distributions from the Joint Venture			0	29,356
Decrease (Increase) in Escrow Deposits			250	(3,405)
Net Cash Used in Investing Activities			(251,105)	(407,915)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing and Equity Issuance Costs			(5)	(2,866)
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			(82,928)	(75,911)
Contributions from Noncontrolling Interests			0	103
Distributions to Noncontrolling Interests			(11,422)	(4,418)
Repayments on Mortgage Loans Payable			(159)	(69,310)
Proceeds from Unsecured Term Loans			0	165,000
Proceeds from Unsecured Credit Facility			196,000	425,000
Repayments on Unsecured Credit Facility			(81,000)	(222,000)
Net Cash Provided by Financing Activities			17,976	225,479
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash			(77,020)	76,453
Cash, Cash Equivalents and Restricted Cash, Beginning of Year			145,118	58,780
Cash, Cash Equivalents and Restricted Cash, End of Period	68,098	135,233	68,098	135,233
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity and Joint Venture Investment			7,825	8,434
Cash Paid for Operating Lease Liabilities			1,645	1,706
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets			563	298
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	44,299	40,359	44,299	40,359
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	465
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate			71,732	119,281
Tenant Improvements Funded by Tenant			2,528	0
Write-off of Fully Depreciated Assets			(16,515)	(19,681)
Noncontrolling Interests
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	1,598	16,685
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(151)	(1,235)	(664)	(1,271)
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	1	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	151	1,234	664	1,270
First Industrial, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	56,234	133,676	117,009	170,799
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation			63,849	57,454
Amortization of Debt Issuance Costs	905	730	1,809	1,486
Other Amortization, Including Equity Based Compensation			16,593	16,567
Equity in Income of Joint Venture	(1,434)	(118,211)	(29,068)	(118,189)
Distributions from the Joint Venture			5,740	118,034
Gain on Sale of Real Estate	(13,053)	(297)	(13,053)	(297)
Straight-line Rental Income and Expense, Net			(11,018)	(9,353)
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net			(1,534)	(4,539)
Increase in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits			5,785	26,988
Net Cash Provided by Operating Activities			156,112	258,950
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate			(89,914)	(183,344)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs			(171,768)	(250,150)
Net Proceeds from Sales of Investments in Real Estate			16,299	1,268
Contributions to and Investments in Joint Venture			(5,972)	(1,640)
Distributions from the Joint Venture			0	29,356
Decrease (Increase) in Escrow Deposits			250	(3,405)
Net Cash Used in Investing Activities			(251,105)	(407,915)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing and Equity Issuance Costs			(5)	(2,866)
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			(82,928)	(75,911)
Contributions from Noncontrolling Interests			3	113
Distributions to Noncontrolling Interests			(11,428)	(4,489)
Repayments on Mortgage Loans Payable			(159)	(69,310)
Proceeds from Unsecured Term Loans			0	165,000
Proceeds from Unsecured Credit Facility			196,000	425,000
Repayments on Unsecured Credit Facility			(81,000)	(222,000)
Net Cash Provided by Financing Activities			17,973	225,418
Net (Decrease) Increase in Cash, Cash Equivalents and Restricted Cash			(77,020)	76,453
Cash, Cash Equivalents and Restricted Cash, Beginning of Year			145,118	58,780
Cash, Cash Equivalents and Restricted Cash, End of Period	68,098	135,233	68,098	135,233
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity and Joint Venture Investment			7,825	8,434
Cash Paid for Operating Lease Liabilities			1,645	1,706
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets			563	298
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	44,299	40,359	44,299	40,359
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	465
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate			71,732	119,281
Tenant Improvements Funded by Tenant			2,528	0
Write-off of Fully Depreciated Assets			(16,515)	(19,681)
First Industrial, L.P. | Limited Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	1,410	2,450
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(151)	(1,235)	(664)	(1,271)
First Industrial, L.P. | General Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	54,613	116,969
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	$ 151	$ 1,235	$ 664	$ 1,271