CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Real Estate and Other Assets Held for Sale, Accumulated Depreciation and Amortization	$ 0	$ 1,471
Common Stock, par value	$ 0.01	$ 0.01
Common Stock, shares authorized	225,000,000	150,000,000
Common Stock, shares issued	119,883,180	117,107,746
Common Stock, shares outstanding	119,883,180	117,107,746
Net Investment in Real Estate	$ 2,705,826	$ 2,588,422
Mortgage Loans Payable, Net	450,056	495,956
First Industrial, L.P.
Real Estate and Other Assets Held for Sale, Accumulated Depreciation and Amortization	$ 0	$ 1,471
General Partner Units, units outstanding	119,883,180	117,107,746
Limited Partner Units, units outstanding	4,008,221	4,039,375
Net Investment in Real Estate	$ 2,705,826	$ 2,588,422
Mortgage Loans Payable, Net	450,056	495,956
Other Real Estate Partnerships
Net Investment in Real Estate	270,708	278,398
Mortgage Loans Payable, Net	$ 61,256	$ 70,366