Annual report pursuant to Section 13 and 15(d)

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

v3.8.0.1
Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Restricted Stock Awards) (Details)
12 Months Ended
Dec. 31, 2017
$ / shares
shares
Dec. 31, 2016
$ / shares
shares
Dec. 31, 2015
$ / shares
item
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares, Outstanding, Beginning balance 145,278 136,220 346,946
Shares, Granted 59,985 74,622 41,337 [1]
Shares, Vested (95,009) (61,654) (250,132)
Shares, Forfeited (1,936) (3,910) (1,931)
Shares, Outstanding, Ending balance 108,318 145,278 136,220
Weighted-Average Grant-Date Fair Value, Outstanding beginning balance | $ / shares $ 21.76 $ 19.36 $ 21.09
Weighted-Average Grant-Date Fair Value, Granted | $ / shares 27.00 23.79 17.51 [1]
Weighted-Average Grant-Date Fair Value, Vested | $ / shares 20.73 18.94 21.44
Weighted-Average Grant-Date Fair Value, Forfeited | $ / shares 25.83 21.58 20.31
Weighted-Average Grant-Date Fair Value, Outstanding ending balance | $ / shares $ 25.49 $ 21.76 $ 19.36
Executive Officers [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of executive officers that were granted restricted stock awards | item     2
Messr Rudin And Messr DeMarco [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares, Granted     37,551
[1] Included in the 41,337 Restricted Stock Awards granted in 2015 were 37,551 awards granted to the Company's two executive officers, Mitchell E. Rudin and Michael J. DeMarco.