CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 83,868	$ 62,344
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation	46,160	46,751
Amortization of Debt Issuance Costs	1,700	1,558
Other Amortization, including Stock Based Compensation	13,638	14,939
Impairment of Real Estate	2,756	0
Provision for Bad Debt	165	127
Equity in Loss of Joint Venture	2	0
Gain on Sale of Real Estate	(45,156)	(28,869)
Loss from Retirement of Debt	39	1,653
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	(3,169)	(938)
Increase in Deferred Rent Receivable, Net	(1,016)	(2,936)
Decrease in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	(5,170)	(729)
Net Cash Provided by Operating Activities	93,817	93,900
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	(87,733)	(96,492)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	(121,169)	(72,125)
Net Proceeds from Sales of Investments in Real Estate	95,603	56,773
Contributions to and Investments in Joint Venture	(25,190)	0
Distributions from Joint Venture	1,829	0
Other Investing Activity	(2,823)	(1,117)
Net Cash Used in Investing Activities	(139,483)	(112,961)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing and Equity Issuance Costs	(2,842)	(1,829)
Proceeds from the Issuance of Common Stock, Net of Underwriter's Discount	145,584	74,880
Repurchase and Retirement of Restricted Stock	(6,020)	(2,401)
Common Stock Dividends and Unit Distributions Paid	(53,561)	(48,493)
Repayments on Mortgage Loans Payable	(161,964)	(41,507)
Prepayments of Penalties Associated with Retirement of Debt	0	(1,453)
Proceeds from Senior Unsecured Notes	300,000	200,000
Repayments of Senior Unsecured Notes	0	(101,871)
Proceeds from Unsecured Credit Facility	217,000	262,000
Repayments on Unsecured Credit Facility	(361,500)	(324,500)
Net Cash Provided by Financing Activities	76,697	14,826
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	31,031	(4,235)
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	46,482	21,461
Cash, Cash Equivalents and Restricted Cash, End of Period	77,513	17,226
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity	3,317	1,907
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	28,771	26,715
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 Indebtedness and Other Liabilities in Connection with the Acquisition of Real Estate	11,705	305
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	27,797	19,786
Write-off of Fully Depreciated Assets	(22,936)	(15,295)
Noncontrolling Interest
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	2,367
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(12,327)	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	10	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	12,317	0
Common Stock
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from the Issuance of Common Stock, Net of Underwriter's Discount	145,584
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	12,327
First Industrial, L.P.
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	83,868	62,344
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation	46,160	46,751
Amortization of Debt Issuance Costs	1,700	1,558
Other Amortization, including Stock Based Compensation	13,638	14,939
Impairment of Real Estate	2,756	0
Provision for Bad Debt	165	127
Equity in Loss of Joint Venture	2	0
Gain on Sale of Real Estate	(45,156)	(28,869)
Loss from Retirement of Debt	39	1,653
Increase in Tenant Accounts Receivable, Prepaid Expenses and Other Assets, Net	(3,226)	(876)
Increase in Deferred Rent Receivable, Net	(1,016)	(2,936)
Decrease in Accounts Payable, Accrued Expenses, Other Liabilities, Rents Received in Advance and Security Deposits	(5,170)	(729)
Net Cash Provided by Operating Activities	93,760	93,962
CASH FLOWS FROM INVESTING ACTIVITIES:
Acquisitions of Real Estate	(87,733)	(96,492)
Additions to Investment in Real Estate and Non-Acquisition Tenant Improvements and Lease Costs	(121,169)	(72,125)
Net Proceeds from Sales of Investments in Real Estate	95,603	56,773
Contributions to and Investments in Joint Venture	(25,190)	0
Distributions from Joint Venture	1,829	0
Other Investing Activity	(2,823)	(1,117)
Net Cash Used in Investing Activities	(139,483)	(112,961)
CASH FLOWS FROM FINANCING ACTIVITIES:
Financing and Equity Issuance Costs	(2,842)	(1,829)
Proceeds from the Issuance of Common Stock, Net of Underwriter's Discount	145,584	74,880
Repurchase and Retirement of Restricted Stock	(6,020)	(2,401)
Common Stock Dividends and Unit Distributions Paid	(53,561)	(48,493)
Contributions from Noncontrolling Interests	121	20
Distributions to Noncontrolling Interests	(64)	(82)
Repayments on Mortgage Loans Payable	(161,964)	(41,507)
Prepayments of Penalties Associated with Retirement of Debt	0	(1,453)
Proceeds from Senior Unsecured Notes	300,000	200,000
Repayments of Senior Unsecured Notes	0	(101,871)
Proceeds from Unsecured Credit Facility	217,000	262,000
Repayments on Unsecured Credit Facility	(361,500)	(324,500)
Net Cash Provided by Financing Activities	76,754	14,764
Net Increase (Decrease) in Cash, Cash Equivalents and Restricted Cash	31,031	(4,235)
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	46,482	21,461
Cash, Cash Equivalents and Restricted Cash, End of Period	77,513	17,226
SUPPLEMENTAL INFORMATION TO STATEMENTS OF CASH FLOWS:
Interest Expense Capitalized in Connection with Development Activity	3,317	1,907
Supplemental Schedule of Non-Cash Investing and Financing Activities:
Dividends and Distributions Payable	28,771	26,715
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 Indebtedness and Other Liabilities in Connection with the Acquisition of Real Estate	11,705	305
Accounts Payable Related to Construction in Progress and Additions to Investment in Real Estate	27,797	19,786
Write-off of Fully Depreciated Assets	(22,935)	(15,295)
First Industrial, L.P. | Limited Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	2,367
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	(12,327)	0
First Industrial, L.P. | General Partner Units
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	81,458
Exchange of Limited Partnership Units for Common Stock/General Partnership Units:
Conversion of Limited Partner Units to Common Stock / General Partner Units	$ 12,327	$ 0