Stockholders' Equity of the Company and Partners' Capital of the Operating Partnership - Summary of Changes in Noncontrolling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Noncontrolling Interest [Line Items]
Beginning Balance			$ 48,077
Net Income	$ 619	$ 1,458	2,986	$ 3,531
Other Comprehensive Income			10,999
Common Stock Dividends and Unit Distributions			(83,338)
Conversion of Limited Partner Units to Common Stock / General Partner Units			0	0
Retirement of Limited Partner Units			(934)
Reallocation - Additional Paid-in-Capital			0
Ending Balance	34,147		34,147
Noncontrolling Interest
Noncontrolling Interest [Line Items]
Beginning Balance			48,077	43,184
Net Income			2,986	3,531
Other Comprehensive Income			208	54
Common Stock Dividends and Unit Distributions			(1,990)	(2,544)
Conversion of Limited Partner Units to Common Stock / General Partner Units			(16,509)	(39)
Retirement of Limited Partner Units			(934)	0
Reallocation - Additional Paid-in-Capital			2,309	1,569
Ending Balance	34,147	45,755	34,147	45,755
Reallocation of OCI			(77)	3
First Industrial, L.P.
Noncontrolling Interest [Line Items]
Beginning Balance			779
Net Income	22	43	65	96
Other Comprehensive Income			10,999
Contributions			124
Distributions			(84)
Conversion of Limited Partner Units to Common Stock / General Partner Units			0	0
Retirement of Limited Partner Units			(934)
Ending Balance	884		884
First Industrial, L.P. | Noncontrolling Interest
Noncontrolling Interest [Line Items]
Beginning Balance			779	956
Net Income			65	96
Contributions			124	29
Distributions			(84)	(284)
Ending Balance	$ 884	$ 797	$ 884	$ 797