Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Restricted Stock Awards) (Details) - $ / shares |
6 Months Ended | |
|---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
|
| Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital [Abstract] | ||
| Shares, Outstanding, Beginning balance | 108,318 | |
| Shares, Granted | 40,185 | |
| Shares, Vested | (72,502) | |
| Shares, Cancelled | (4,840) | |
| Shares, Outstanding, Ending balance | 71,161 | |
| Weighted-Average Grant-Date Fair Value, Outstanding beginning balance | $ 25.49 | |
| Weighted-Average Grant-Date Fair Value, Granted | 20.16 | |
| Weighted-Average Grant-Date Fair Value, Vested | 25.33 | |
| Weighted-Average Grant-Date Fair Value, Cancelled | 25.83 | |
| Weighted-Average Grant-Date Fair Value, Outstanding ending balance | $ 22.63 | |
| Unvested performance shares | 1,795,747 | 1,230,877 |