Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Stock Option Plans) (Details) - USD ($)
$ / shares in Units, $ in Thousands |
12 Months Ended |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
|
|
| Outstanding stock option price |
$ 17.31
|
$ 17.31
|
$ 17.31
|
| 2013 Incentive Stock Plan [Member] |
|
|
|
| Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |
|
|
|
| Shares Under Options - Outstanding, beginning balance |
800,000
|
800,000
|
805,000
|
| Shares Under Options - Granted, Lapsed or Cancelled |
|
|
|
| Shares Under Options - Lapsed or Cancelled |
|
|
(5,000)
|
| Shares Under Options - Outstanding, ending balance |
800,000
|
800,000
|
800,000
|
| Shares Under Options - Options exercisable |
800,000
|
|
|
| Shares Under Options - Available for grant |
1,580,869
|
|
|
| Weighted Average Exercise Price - Outstanding, beginning balance |
$ 17.31
|
$ 17.31
|
$ 17.33
|
| Weighted Average Exercise Price - Granted, Lapsed or Cancelled |
|
|
|
| Weighted Average Exercise Price - Lapsed or Cancelled |
|
|
21.25
|
| Weighted Average Exercise Price - Outstanding, ending balance |
$ 17.31
|
$ 17.31
|
$ 17.31
|
| Aggregate Intrinsic Value, Outstanding, beginning balance |
$ 3,400
|
$ 9,368
|
$ 4,843
|
| Aggregate Intrinsic Value, Outstanding, ending balance |
$ 1,824
|
$ 3,400
|
$ 9,368
|