Quarterly report pursuant to Section 13 or 15(d)

Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Diluted Computation Of EPS) (Details)

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Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Diluted Computation Of EPS) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]        
Income available to common shareholders $ 48,393 $ 35,379 $ 110,584 $ 32,858
Add (deduct): Noncontrolling interest in Operating Partnership 5,662 4,383 12,946 4,069
Net income for diluted earnings per share $ 54,055 $ 39,762 $ 123,530 $ 36,927
Weighted average common shares 100,401 100,314 100,359 100,313
Net income available to common shareholders $ 0.54 $ 0.40 $ 1.23 $ 0.37