Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Restricted Stock Awards) (Details) - 6 months ended Jun. 30, 2015 |
item
$ / shares
shares
|
|---|---|
| Mack-Cali Realty Corporation Stockholders' Equity [Abstract] | |
| Shares, Outstanding, Beginning balance | shares | 346,946 |
| Shares granted | shares | 41,337 |
| Shares, Vested | shares | (37,392) |
| Shares, Forfeited | shares | (3) |
| Shares, Outstanding, Ending balance | shares | 350,888 |
| Weighted-Average Grant-Date Fair Value, Outstanding beginning balance | $ 21.09 |
| Weighted-Average Grant-Date Fair Value, Granted | 17.51 |
| Weighted-Average Grant-Date Fair Value, Vested | 21.59 |
| Weighted-Average Grant-Date Fair Value, Forfeited | 26.36 |
| Weighted-Average Grant-Date Fair Value, Outstanding ending balance | $ 20.61 |
| Number of executive officers who departed | item | 2 |