Quarterly report pursuant to Section 13 or 15(d)

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Restricted Stock Awards) (Details)

v3.20.2
Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Restricted Stock Awards) (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital [Abstract]        
Shares, Outstanding, Beginning balance 17,076 26,136 42,690 67,289
Shares, Vested (17,076)   (42,690) (41,153)
Shares, Granted 52,974   52,974  
Shares, Cancelled   (1,936)   (1,936)
Shares, Outstanding, Ending balance 52,974 24,200 52,974 24,200
Weighted-Average Grant-Date Fair Value, Outstanding beginning balance $ 21.08 $ 25.80 $ 21.08 $ 22.43
Weighted-Average Grant-Date Fair Value, Vested 21.08   21.08 20.29
Weighted-Average Grant-Date Fair Value, Granted 15.29   15.29  
Weighted-Average Grant-Date Fair Value, Cancelled   25.83   25.83
Weighted-Average Grant-Date Fair Value, Outstanding ending balance $ 15.29 $ 25.83 $ 15.29 $ 25.83