Quarterly report pursuant to Section 13 or 15(d)

Mack-Cali Realty Corporation Stockholders' Equity (Stock Compensation) (Details)

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Mack-Cali Realty Corporation Stockholders' Equity (Stock Compensation) (Details) (USD $)
9 Months Ended
Oct. 05, 2011
Sep. 30, 2011
Jan. 05, 2011
Dec. 31, 2010
Sep. 30, 2010
Sep. 30, 2011
Restricted Stock [Member]
Sep. 30, 2011
Contingently Issuable Shares [Member]
Restricted Stock Award vesting period, minimum (years)   1          
Restricted Stock Award vesting period, maximum (years)   7          
Common stock, shares outstanding 87,142,004 87,141,716 79,605,542 79,605,474      
Restricted stock awards unvested shares outstanding performance contingent             98,524
Outstanding at January 1, 2011   157,681     216,802 239,759  
Vested           (82,078)  
Outstanding at September 30, 2011   157,681     216,802 157,681  
Outstanding at January 1, 2011           $ 35.90  
Vested           $ 37.01  
Outstanding at September 30, 2011           $ 35.32