CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 41,529	$ 24,340
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation	24,906	24,376
Amortization of Debt Issuance Costs	788	831
Other Amortization, including Stock Based Compensation	7,920	7,022
Equity in Loss (Income) of Joint Venture	29	(844)
Distributions from Joint Venture	0	568
(Gain) Loss on Sale of Real Estate	(13,993)	208
Straight-line Rental Income and Expense, Net	(2,898)	(2,690)
Increase in Tenant Accounts Receivable and Prepaid Expenses and Other Assets, Net	(4,452)	(6,390)
Decrease in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	(13,560)	(5,692)
Net Cash Provided by Operating Activities	40,269	41,729
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	(142,380)	(18,499)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	(55,813)	(43,402)
Net Proceeds from Sales of Investments in Real Estate	26,030	9,793
Contributions to and Investments in Joint Venture	(339)	0
Distributions from Joint Venture	0	2,175
Deposits on Future Acquisitions and Other Investing Activity	(10,550)	(7,048)
Net Cash Used in Investing Activities	(183,052)	(56,981)
CASH FLOWS FROM FINANCING ACTIVITIES:
Tax Paid on Shares Withheld	(5,944)	(4,384)
Common Stock Dividends and Unit Distributions Paid	(29,730)	(28,042)
Repayments on Mortgage Loans Payable	(1,257)	(73,806)
Proceeds from Unsecured Credit Facility	232,000	121,000
Repayments on Unsecured Credit Facility	(70,000)	(19,000)
Net Cash Provided by (Used in) Financing Activities	125,069	(4,232)
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(17,714)	(19,484)
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	152,718	50,373
Cash, Cash Equivalents and Restricted Cash, End of Period	135,004	30,889
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity	1,558	944
Cash Paid for Operating Lease Liabilities	727	268
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	32,857	30,139
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0
Assumption of Liabilities in Connection with the Acquisition of Real Estate	3,385	0
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	34,307	43,002
Write-off of Fully Depreciated Assets	(6,195)	(11,176)
Noncontrolling Interest
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	895	537
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(2,064)	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	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	2,062	0
First Industrial, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	41,529	24,340
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation	24,906	24,376
Amortization of Debt Issuance Costs	788	831
Other Amortization, including Stock Based Compensation	7,920	7,022
Equity in Loss (Income) of Joint Venture	29	(844)
Distributions from Joint Venture	0	568
(Gain) Loss on Sale of Real Estate	(13,993)	208
Straight-line Rental Income and Expense, Net	(2,898)	(2,690)
Increase in Tenant Accounts Receivable and Prepaid Expenses and Other Assets, Net	(4,091)	(6,347)
Decrease in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	(13,560)	(5,692)
Net Cash Provided by Operating Activities	40,630	41,772
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	(142,380)	(18,499)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	(55,813)	(43,402)
Net Proceeds from Sales of Investments in Real Estate	26,030	9,793
Contributions to and Investments in Joint Venture	(339)	0
Distributions from Joint Venture	0	2,175
Deposits on Future Acquisitions and Other Investing Activity	(10,550)	(7,048)
Net Cash Used in Investing Activities	(183,052)	(56,981)
CASH FLOWS FROM FINANCING ACTIVITIES:
Tax Paid on Shares Withheld	(5,944)	(4,384)
Common Stock Dividends and Unit Distributions Paid	(29,730)	(28,042)
Contributions from Noncontrolling Interests	5	0
Distributions to Noncontrolling Interests	(366)	(43)
Repayments on Mortgage Loans Payable	(1,257)	(73,806)
Proceeds from Unsecured Credit Facility	232,000	121,000
Repayments on Unsecured Credit Facility	(70,000)	(19,000)
Net Cash Provided by (Used in) Financing Activities	124,708	(4,275)
Net Decrease in Cash, Cash Equivalents and Restricted Cash	(17,714)	(19,484)
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	152,718	50,373
Cash, Cash Equivalents and Restricted Cash, End of Period	135,004	30,889
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity	1,558	944
Cash Paid for Operating Lease Liabilities	727	268
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	32,857	30,139
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0
Assumption of Liabilities in Connection with the Acquisition of Real Estate	3,385	0
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	34,307	43,002
Write-off of Fully Depreciated Assets	(6,195)	(11,176)
First Industrial, L.P. | Limited Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	895	537
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(2,064)	0
First Industrial, L.P. | General Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	40,584	23,777
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	$ 2,064	$ 0