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		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Noncontrolling Interest [Line Items]
Beginning Balance			$ 48,077
Net Income	$ 1,195	$ 1,291	2,367	$ 2,073
Other Comprehensive Income			9,297
Common Stock Dividends and Unit Distributions			(55,316)
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	38,183		38,183
Noncontrolling Interest
Noncontrolling Interest [Line Items]
Beginning Balance			48,077	43,184
Net Income			2,367	2,073
Other Comprehensive Income			200	30
Common Stock Dividends and Unit Distributions			(1,418)	(1,696)
Conversion of Limited Partner Units to Common Stock / General Partner Units			(12,327)	0
Retirement of Limited Partner Units			(934)	0
Reallocation - Additional Paid-in-Capital			2,218	1,525
Ending Balance	38,183	45,116	38,183	45,116
Reallocation of OCI			(63)	3
First Industrial, L.P.
Noncontrolling Interest [Line Items]
Beginning Balance			779
Net Income	22	26	43	53
Other Comprehensive Income			9,297
Contributions			121
Distributions			(64)
Conversion of Limited Partner Units to Common Stock / General Partner Units			0	0
Retirement of Limited Partner Units			(934)
Ending Balance	879		879
First Industrial, L.P. | Noncontrolling Interest
Noncontrolling Interest [Line Items]
Beginning Balance			779	956
Net Income			43	53
Contributions			121	20
Distributions			(64)	(82)
Ending Balance	$ 879	$ 947	$ 879	$ 947