Quarterly report pursuant to Section 13 or 15(d)

Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share) (Narrative) (Details)

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Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share) (Narrative) (Details) (USD $)
3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Unvested restricted stock outstanding 105,843   105,843   187,447
Dividends declared per common share $ 0.45 $ 0.45 $ 0.90 $ 0.90  
Restricted Stock [Member]
         
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Unvested restricted stock outstanding 105,843 157,681 105,843 157,681