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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, 2014
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Jun. 30, 2013
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Dec. 31, 2013
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| Mack-Cali Realty Corporation Stockholders' Equity [Abstract] | |||
| Maximum percentage of retainer fee that directors may defer | 100.00% | ||
| Deferred stock units earned | 10,245 | 10,372 | |
| Deferred stock units outstanding | 148,208 | 136,440 | |