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Mack-Cali Realty Corporation Stockholders' Equity (Deferred Stock Compensation Plan For Directors) (Narrative) (Details)
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6 Months Ended | ||
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Jun. 30, 2011
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Jun. 30, 2010
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Dec. 31, 2010
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| Mack-Cali Realty Corporation Stockholders' Equity | Â | Â | Â |
| Deferred stock units earned | 6,385 | 6,311 | Â |
| Deferred stock units outstanding | 90,585 | Â | 84,236 |