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Earnings Per Share / Unit (EPS / EPU) - Additional Information (Details) - shares | Sep. 30, 2023 | Sep. 30, 2022
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Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |
Unvested Restricted Stock / Unit Awards | 129,019 | 144,121
First Industrial, L.P. |  |
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] |  |
Unvested Restricted Stock / Unit Awards | 351,796 | 337,071

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