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 | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Jun. 30, 2018 |
|
| Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital [Abstract] | ||||
| Shares, Outstanding, Beginning balance | 66,321 | 74,413 | 67,289 | 108,318 |
| Shares, Granted | 40,185 | 40,185 | ||
| Shares, Vested | (40,185) | (42,469) | (41,153) | (72,502) |
| Shares, Cancelled | (968) | (4,840) | ||
| Shares, Outstanding, Ending balance | 26,136 | 71,161 | 26,136 | 71,161 |
| Weighted-Average Grant-Date Fair Value, Outstanding beginning balance | $ 22.38 | $ 24.87 | $ 22.43 | $ 25.49 |
| Weighted-Average Grant-Date Fair Value, Granted | 20.16 | 20.16 | ||
| Weighted-Average Grant-Date Fair Value, Vested | 20.16 | 24.17 | 20.29 | 25.33 |
| Weighted-Average Grant-Date Fair Value, Cancelled | 25.83 | 25.83 | ||
| Weighted-Average Grant-Date Fair Value, Outstanding ending balance | $ 25.80 | $ 22.63 | $ 25.80 | $ 22.63 |