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Earnings Per Share / Unit (EPS / EPU) - Computation of Basic and Diluted EPS / EPU (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Numerator: |  |  |  |
Net Income Available to Common Stockholders / Unitholders and Participating Securities | $ 51,936 | $ 35,669 | $ 114,134 | $ 76,303
Net Income Allocable to Participating Securities | (61) | (59) | (122) | (118)
Net Income Available to Common Stockholders / Unitholders | $ 51,875 | $ 35,610 | $ 114,012 | $ 76,185
Denominator: |  |  |  |
Weighted Average Shares / Units - Basic | 129,098 | 127,074 | 129,093 | 127,004
Performance Units (See Note 9) / Performance Units and certain Performance RLP Units (See Note 6) | 89 | 192 | 86 | 185
Weighted Average Shares / Units - Diluted | 129,187 | 127,266 | 129,179 | 127,189
Basic and Diluted Earnings Per Share / Unit: |  |  |  |
Net Income Available to Common Stockholders / Unitholders | $ 0.40 | $ 0.28 | $ 0.88 | $ 0.60
First Industrial, L.P. |  |  |  |
Numerator: |  |  |  |
Net Income Available to Common Stockholders / Unitholders and Participating Securities | $ 53,140 | $ 36,332 | $ 116,705 | $ 77,811
Net Income Allocable to Participating Securities | (155) | (125) | (315) | (249)
Net Income Available to Common Stockholders / Unitholders | $ 52,985 | $ 36,207 | $ 116,390 | $ 77,562
Denominator: |  |  |  |
Weighted Average Shares / Units - Basic | 131,188 | 129,081 | 131,180 | 129,075
Performance Units (See Note 9) / Performance Units and certain Performance RLP Units (See Note 6) | 516 | 380 | 489 | 355
Weighted Average Shares / Units - Diluted | 131,704 | 129,461 | 131,669 | 129,430
Basic and Diluted Earnings Per Share / Unit: |  |  |  |
Earnings Per Share, Basic | $ 0.40 | $ 0.28 | $ 0.89 | $ 0.60
Earnings Per Share, Diluted | $ 0.40 | $ 0.28 | $ 0.88 | $ 0.60

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