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
Mar. 31, 2019	Mar. 31, 2018
Noncontrolling Interest [Line Items]
Beginning Balance	$ 34,397
Net Income	537	$ 1,172
Amortization of Unearned Compensation related to the Issuance of LTIP Units (A)	(2,035)	(4,385)
Other Comprehensive Income (Loss)	(6,330)	6,549
Unit Distributions	(29,922)	(27,107)
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	0
Reallocation - Other Comprehensive Income	0
Ending Balance	37,645
Noncontrolling Interest
Noncontrolling Interest [Line Items]
Beginning Balance	34,397	48,077
Net Income	537	1,172
Amortization of Unearned Compensation related to the Issuance of LTIP Units (A)	270	0
Other Comprehensive Income (Loss)	(140)	183
Unit Distributions	(664)	(775)
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	(5,009)
Retirement of Limited Partner Units	0	(934)
Reallocation - Additional Paid-in-Capital	3,238	292
Reallocation - Other Comprehensive Income	7	0
Ending Balance	37,645	43,006
First Industrial, L.P.
Noncontrolling Interest [Line Items]
Beginning Balance	857
Net Income	26	21
Other Comprehensive Income (Loss)	(6,330)	6,549
Contributions		116
Distributions	(43)	(21)
Conversion of Limited Partner Units to Common Stock / General Partner Units	0	0
Retirement of Limited Partner Units		(934)
Ending Balance	840
First Industrial, L.P. \| Noncontrolling Interest
Noncontrolling Interest [Line Items]
Beginning Balance	857	779
Net Income	26	21
Contributions	0	116
Distributions	(43)	(21)
Ending Balance	$ 840	$ 895

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