Stockholders’ Equity of the Company and Partners' Capital of the Operating Partnership - Common Stock and Units Roll-Forward (Details) - shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Class of Stock [Line Items]
Common Stock/Units, Outstanding, Beginning Balance	119,883,180
Issuance of Restricted Stock/Units Awards	406,347
Vesting of LTIP Unit Awards	469,533
Limited Partners' Capital Account, Units Retired	(33,333)
Common Stock/Units, Outstanding, Ending Balance	126,307,431	119,883,180
Common Stock / Operating Partnership Units
Class of Stock [Line Items]
Common Stock/Units, Outstanding, Beginning Balance	119,883,180	117,107,746	111,027,225
Issuance of Common Stock/Contribution of General Partner Units	4,800,000	2,560,000	5,600,000
Issuance of Restricted Stock/Units Awards	227,059	275,793	322,833
Vesting of LTIP Unit Awards	150,772
Repurchase and Retirement of Restricted Stock/Unit Awards	(104,301)	(91,513)	(108,644)
Conversion of Limited Partner Units	1,350,721	31,154	266,332
Limited Partners' Capital Account, Units Retired	0
Common Stock/Units, Outstanding, Ending Balance	126,307,431	119,883,180	117,107,746
First Industrial, L.P. \| Common Stock / Operating Partnership Units
Class of Stock [Line Items]
Common Stock/Units, Outstanding, Beginning Balance	123,891,401	121,147,121	115,332,932
Issuance of Common Stock/Contribution of General Partner Units	4,800,000	2,560,000	5,600,000
Issuance of Restricted Stock/Units Awards	227,059	275,793	322,833
Vesting of LTIP Unit Awards	150,772
Repurchase and Retirement of Restricted Stock/Unit Awards	(104,301)	(91,513)	(108,644)
Conversion of Limited Partner Units	0	0	0
Limited Partners' Capital Account, Units Retired	(33,333)
Common Stock/Units, Outstanding, Ending Balance	128,931,598	123,891,401	121,147,121

Limited Partners' Capital Account, Units Retired

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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