CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 36,426	$ 116,744	$ 77,955
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation		53,073	50,695
Amortization of Debt Issuance Costs	784	1,884	1,572
Other Amortization, including Equity Based Compensation		15,914	16,332
Equity in Loss of Joint Ventures	45	139	74
Gain on Sale of Real Estate	(9,076)	(57,499)	(23,069)
Straight-line Rental Income and Expense, Net		(9,309)	(4,929)
(Increase) Decrease in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net		(2,936)	4,231
Increase (Decrease) in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits		474	(5,404)
Net Cash Provided by Operating Activities		118,484	117,457
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate		(155,807)	(164,012)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs		(124,050)	(109,930)
Net Proceeds from Sales of Investments in Real Estate		101,131	40,529
Contributions to and Investments in Joint Ventures		(1,321)	(3,889)
Distributions from Joint Ventures		21,407	0
Increase in Escrow Deposits and Other Investing Activity		(3,018)	(8,470)
Net Cash Used in Investing Activities		(161,658)	(245,772)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing Issuance Costs		(64)	0
Tax Paid on Vested Equity Compensation		(5,126)	(5,944)
Common Stock Dividends and Unit Distributions Paid		(68,368)	(62,110)
Repayments on Mortgage Loans Payable		(60,312)	(17,506)
Proceeds from Unsecured Credit Facility		80,000	232,000
Repayments on Unsecured Credit Facility		(20,000)	(70,000)
Net Cash (Used in) Provided by Financing Activities		(73,870)	76,440
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(117,044)	(51,875)
Cash, Cash Equivalents and Restricted Cash, Beginning of Year		199,658	152,718
Cash, Cash Equivalents and Restricted Cash, End of Period	100,843	82,614	100,843
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity		4,336	3,458
Cash Paid for Operating Lease Liabilities		1,546	1,402
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets		157	1,208
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	33,036	36,336	33,036
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
Assumption of Escrow in Connection with the Acquisition of Real Estate		3,611	0
Assumption of Liabilities in Connection with the Acquisition of Real Estate		3,215	3,425
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate		47,633	25,094
Tenant Improvements Funded by Tenant		15,992	0
Write-off of Fully Depreciated Assets		(13,372)	(19,400)
Noncontrolling Interests
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	757
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(1)	(22)	(2,065)
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	2
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	1	22	2,063
First Industrial, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	36,426	116,744	77,955
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation		53,073	50,695
Amortization of Debt Issuance Costs	784	1,884	1,572
Other Amortization, including Equity Based Compensation		15,914	16,332
Equity in Loss of Joint Ventures	45	139	74
Gain on Sale of Real Estate	(9,076)	(57,499)	(23,069)
Straight-line Rental Income and Expense, Net		(9,309)	(4,929)
(Increase) Decrease in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net		(2,918)	4,645
Increase (Decrease) in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits		474	(5,404)
Net Cash Provided by Operating Activities		118,502	117,871
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate		(155,807)	(164,012)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs		(124,050)	(109,930)
Net Proceeds from Sales of Investments in Real Estate		101,131	40,529
Contributions to and Investments in Joint Ventures		(1,321)	(3,889)
Distributions from Joint Ventures		21,407	0
Increase in Escrow Deposits and Other Investing Activity		(3,018)	(8,470)
Net Cash Used in Investing Activities		(161,658)	(245,772)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing Issuance Costs		(64)	0
Tax Paid on Vested Equity Compensation		(5,126)	(5,944)
Common Stock Dividends and Unit Distributions Paid		(68,368)	(62,110)
Contributions from Noncontrolling Interests		29	17
Distributions to Noncontrolling Interests		(47)	(431)
Repayments on Mortgage Loans Payable		(60,312)	(17,506)
Proceeds from Unsecured Credit Facility		80,000	232,000
Repayments on Unsecured Credit Facility		(20,000)	(70,000)
Net Cash (Used in) Provided by Financing Activities		(73,888)	76,026
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(117,044)	(51,875)
Cash, Cash Equivalents and Restricted Cash, Beginning of Year		199,658	152,718
Cash, Cash Equivalents and Restricted Cash, End of Period	100,843	82,614	100,843
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity		4,336	3,458
Cash Paid for Operating Lease Liabilities		1,546	1,402
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets		157	1,208
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	33,036	36,336	33,036
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
Assumption of Escrow in Connection with the Acquisition of Real Estate		3,611	0
Assumption of Liabilities in Connection with the Acquisition of Real Estate		3,215	3,425
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate		47,633	25,094
Tenant Improvements Funded by Tenant		15,992	0
Write-off of Fully Depreciated Assets		(13,372)	(19,400)
First Industrial, L.P. | Limited Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	757
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(1)	(22)	(2,065)
First Industrial, L.P. | General Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	35,575
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	$ 1	$ 22	$ 2,065