Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Restricted Stock Awards) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
item
Dec. 31, 2012
item
Dec. 31, 2011
item
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unvested restricted stock outstanding, beginning balance 134,328 187,447 239,759
Shares, Granted 168,841 [1],[2] 70,758 [3] 81,736 [4]
Shares, Vested (149,463) (123,877) (134,048)
Shares, Forfeited (146)    
Unvested restricted stock outstanding, ending balance 153,560 [1] 134,328 187,447
Weighted-Average Grant-Date Fair Value, Outstanding beginning balance $ 31.65 $ 33.82 $ 35.90
Weighted-Average Grant-Date Fair Value, Granted $ 23.99 [1],[2] $ 25.28 [3] $ 25.38 [4]
Weighted-Average Grant-Date Fair Value, Vested $ 29.63 $ 31.30 $ 32.39
Weighted-Average Grant-Date Fair Value, Forfeited $ 26.36    
Weighted-Average Grant-Date Fair Value, Outstanding ending balance $ 25.20 [1] $ 31.65 $ 33.82
Number of executive officers that were granted restricted stock awards 4 3 4
Unvested performance shares 63,933    
Executive Officer [Member]
      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares, Granted 106,933 42,273 51,970
[1] Includes 63,933 Performance Shares which were granted in 2013 for which the performance goals were not met.
[2] Included in the 168,841 Restricted Stock Awards granted in 2013 were 106,933 awards granted to the Company’s four executive officers, Mitchell E. Hersh, Barry Lefkowitz, Roger W. Thomas and Anthony Krug.
[3] Included in the 70,758 Restricted Stock Awards granted in 2012 were 42,273 awards granted to the Company’s three executive officers, Mitchell E. Hersh, Barry Lefkowitz and Roger W. Thomas.
[4] Included in the 81,736 Restricted Stock Awards granted in 2011 were 51,970 awards granted to the Company’s four executive officers, Mitchell E. Hersh, Barry Lefkowitz, Roger W. Thomas and Michael Grossman.