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 9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]        
Dividends declared per common share $ 0.45 $ 0.45 $ 1.35 $ 1.35
Unvested restricted stock outstanding 157,681 216,802 157,681 216,802