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Summary of Significant Accounting Policies - Summary of New Accounting Pronouncements (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
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Summary of New Accounting Pronouncement [Line Items] |  |
Total Assets | $ 2,706,680 | $ 2,581,995
Total Liabilities | 1,626,946 | 1,491,168
First Industrial, L.P. |  |
Summary of New Accounting Pronouncement [Line Items] |  |
Total Assets | 2,717,493 | 2,592,708
Total Liabilities | 1,626,946 | 1,491,118
Noncontrolling Interest | $ 1,131 | 1,080
Previously Reported | First Industrial, L.P. |  |
Summary of New Accounting Pronouncement [Line Items] |  |
Total Assets |  | 2,514,246
Total Liabilities |  | 1,413,736
Noncontrolling Interest |  | 0
Restatement Adjustment | First Industrial, L.P. |  |
Summary of New Accounting Pronouncement [Line Items] |  |
Total Assets |  | 78,462
Total Liabilities |  | 77,382
Noncontrolling Interest |  | $ 1,080

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