Earnings Per Share - Computation of Basic and Diluted Earning Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Numerator:
Income (Loss) from Continuing Operations	$ 3,606	$ (1,355)	$ 7,892	$ (527)
Gain on Sale of Real Estate	0	0	0	262
Noncontrolling Interest Allocable to Continuing Operations	(142)	281	(215)	425
Income from Continuing Operations Allocable to Participating Securities	(37)	0	(60)	0
Income (Loss) from Continuing Operations Attributable to First Industrial Realty Trust, Inc.	3,427	(1,074)	7,617	160
Preferred Dividends	0	(2,277)	(1,019)	(6,114)
Redemption of Preferred Stock	0	(3,546)	(1,462)	(3,546)
Income (Loss) from Continuing Operations Available to First Industrial Realty Trust, Inc.’s Common Stockholders	3,427	(6,897)	5,136	(9,500)
Income from Discontinued Operations	598	12,717	1,379	10,504
Noncontrolling Interest Allocable to Discontinued Operations	(23)	(526)	(54)	(450)
Income from Discontinued Operations Allocable to Participating Securities	(6)	(42)	(15)	(78)
Income from Discontinued Operations Attributable to First Industrial Realty Trust, Inc.	569	12,149	1,310	9,976
Net Income Available to First Industrial Realty Trust, Inc.’s Common Stockholders and Participating Securities	4,039	5,294	6,521	554
Net Income Allocable to Participating Securities	(43)	(42)	(75)	(78)
Net Income Available to First Industrial Realty Trust, Inc.’s Common Stockholders	$ 3,996	$ 5,252	$ 6,446	$ 476
Denominator:
Weighted Average Shares—Basic	109,815	108,117	109,746	104,466
LTIP Unit Awards	589	0	564	0
Weighted Average Shares—Diluted	110,404	108,117	110,310	104,466
Basic and Diluted EPS:
Income (Loss) from Continuing Operations Available to First Industrial Realty Trust, Inc.’s Common Stockholders	$ 0.03	$ (0.06)	$ 0.05	$ (0.09)
Income from Discontinued Operations Attributable to First Industrial Realty Trust, Inc.’s Common Stockholders	$ 0.01	$ 0.11	$ 0.01	$ 0.10
Net Income Available to First Industrial Realty Trust, Inc.’s Common Stockholders	$ 0.04	$ 0.05	$ 0.06	$ 0.01