CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Net Investment in Real Estate	$ 2,697,975	$ 2,588,422
Real Estate and Other Assets Held for Sale, Accumulated Depreciation and Amortization	20,110	1,471
Mortgage Loans Payable, Net	$ 452,551	$ 495,956
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	225,000,000	150,000,000
Common Stock, shares issued	119,848,432	117,107,746
Common Stock, shares outstanding	119,848,432	117,107,746
First Industrial, L.P.
Net Investment in Real Estate	$ 2,697,975	$ 2,588,422
Real Estate and Other Assets Held for Sale, Accumulated Depreciation and Amortization	20,110	1,471
Mortgage Loans Payable, Net	$ 452,551	$ 495,956
General Partner Units, units outstanding	119,848,432	117,107,746
Limited Partner Units, units outstanding	4,035,938	4,039,375
Other Real Estate Partnerships
Net Investment in Real Estate	$ 279,626	$ 278,398
Mortgage Loans Payable, Net	$ 61,586	$ 70,366