CONSOLIDATED STATEMENTS OF CASH FLOWS $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 36,426	$ 77,955	$ 65,053
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation		50,695	48,629
Amortization of Debt Issuance Costs	784	1,572	1,625
Other Amortization, including Stock Based Compensation		16,332	14,156
Equity in Loss (Income) of Joint Venture	45	74	(16,360)
Distributions from Joint Venture		0	16,084
Gain on Sale of Real Estate	(9,076)	(23,069)	(889)
Payments to Settle Derivative Instruments	0	0	(3,149)
Straight-line Rental Income and Expense, Net		(4,929)	(5,926)
Decrease (Increase) in Tenant Accounts Receivable and Prepaid Expenses and Other Assets, Net		4,231	(2,839)
(Decrease) Increase in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits		(5,404)	3,734
Net Cash Provided by Operating Activities		117,457	120,118
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate		(164,012)	(52,395)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs		(109,930)	(119,174)
Net Proceeds from Sales of Investments in Real Estate		40,529	11,179
Contributions to and Investments in Joint Venture		(3,889)	0
Distributions from Joint Venture		0	8,586
Deposits on Future Acquisitions and Other Investing Activity		(8,470)	(5,758)
Net Cash Used in Investing Activities		(245,772)	(157,562)
CASH FLOWS FROM FINANCING ACTIVITIES:
Tax Paid on Shares Withheld		(5,944)	(4,384)
Common Stock Dividends and Unit Distributions Paid		(62,110)	(57,764)
Repayments on Mortgage Loans Payable		(17,506)	(75,336)
Proceeds from Unsecured Credit Facility		232,000	187,000
Repayments on Unsecured Credit Facility		(70,000)	(29,000)
Net Cash Provided by Financing Activities		76,440	20,516
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(51,875)	(16,928)
Cash, Cash Equivalents and Restricted Cash, Beginning of Year		152,718	50,373
Cash, Cash Equivalents and Restricted Cash, End of Period	100,843	100,843	33,445
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity		3,458	2,320
Cash Paid for Operating Lease Liabilities		1,402	613
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets		1,208	12,400
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	33,036	33,036	30,281
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 Liabilities in Connection with the Acquisition of Real Estate		3,425	290
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate		25,094	48,344
Write-off of Fully Depreciated Assets		(19,400)	(19,646)
Noncontrolling Interest
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)	(2,065)	0
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	2	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	1	2,063	0
First Industrial, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	36,426	77,955	65,053
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation		50,695	48,629
Amortization of Debt Issuance Costs	784	1,572	1,625
Other Amortization, including Stock Based Compensation		16,332	14,156
Equity in Loss (Income) of Joint Venture	45	74	(16,360)
Distributions from Joint Venture		0	16,084
Gain on Sale of Real Estate	(9,076)	(23,069)	(889)
Payments to Settle Derivative Instruments	0	0	(3,149)
Straight-line Rental Income and Expense, Net		(4,929)	(5,926)
Decrease (Increase) in Tenant Accounts Receivable and Prepaid Expenses and Other Assets, Net		4,645	(2,780)
(Decrease) Increase in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits		(5,404)	3,734
Net Cash Provided by Operating Activities		117,871	120,177
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate		(164,012)	(52,395)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs		(109,930)	(119,174)
Net Proceeds from Sales of Investments in Real Estate		40,529	11,179
Contributions to and Investments in Joint Venture		(3,889)	0
Distributions from Joint Venture		0	8,586
Deposits on Future Acquisitions and Other Investing Activity		(8,470)	(5,758)
Net Cash Used in Investing Activities		(245,772)	(157,562)
CASH FLOWS FROM FINANCING ACTIVITIES:
Tax Paid on Shares Withheld		(5,944)	(4,384)
Common Stock Dividends and Unit Distributions Paid		(62,110)	(57,764)
Contributions from Noncontrolling Interests		17	5
Distributions to Noncontrolling Interests		(431)	(64)
Repayments on Mortgage Loans Payable		(17,506)	(75,336)
Proceeds from Unsecured Credit Facility		232,000	187,000
Repayments on Unsecured Credit Facility		(70,000)	(29,000)
Net Cash Provided by Financing Activities		76,026	20,457
Net Decrease in Cash, Cash Equivalents and Restricted Cash		(51,875)	(16,928)
Cash, Cash Equivalents and Restricted Cash, Beginning of Year		152,718	50,373
Cash, Cash Equivalents and Restricted Cash, End of Period	100,843	100,843	33,445
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity		3,458	2,320
Cash Paid for Operating Lease Liabilities		1,402	613
Supplemental Schedule of Non-Cash Operating Activities:
Operating Lease Liabilities Arising from Obtaining Right-of-Use Assets		1,208	12,400
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	33,036	33,036	30,281
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 Liabilities in Connection with the Acquisition of Real Estate		3,425	290
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate		25,094	48,344
Write-off of Fully Depreciated Assets		(19,400)	(19,646)
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)	(2,065)	0
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	$ 2,065	$ 0