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Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Restricted Stock Awards) (Details) (USD $)
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9 Months Ended |
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Sep. 30, 2012
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| Mack-Cali Realty Corporation Stockholders' Equity [Abstract] | |
| Unvested restricted stock outstanding, beginning balance | 187,447 |
| Shares, Vested | (81,604) |
| Unvested restricted stock outstanding, ending balance | 105,843 |
| Weighted-Average Grant-Date Fair Value, Outstanding beginning balance | $ 33.82 |
| Weighted-Average Grant-Date Fair Value, Vested | $ 34.42 |
| Weighted-Average Grant-Date fair value, Outstanding ending balance | $ 33.36 |