Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Restricted Stock Awards And Performance Share Units) (Narrative) (Details) - USD ($)
$ in Millions |
|
12 Months Ended |
|
Jun. 05, 2015 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Unvested restricted stock outstanding |
|
108,318
|
145,278
|
136,220
|
|
346,946
|
| Shares granted |
|
59,985
|
74,622
|
41,337
|
[1] |
|
| Restricted Stock [Member] | 2013 Incentive Stock Plan [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Stock compensation vesting period |
|
3 years
|
|
|
|
|
| Shares granted |
37,550.54
|
|
|
|
|
|
| Restricted Stock [Member] | Minimum [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Stock compensation vesting period |
|
1 year
|
|
|
|
|
| Restricted Stock [Member] | Maximum [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Stock compensation vesting period |
|
7 years
|
|
|
|
|
| Unvested Restricted Stock [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Unvested restricted stock outstanding |
|
95,801
|
120,245
|
98,669
|
|
|
| Total Stockholder Return Based Awards [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Total unrecognized compensation cost |
|
$ 0.9
|
|
|
|
|
| Total unrecognized compensation cost, period of recognition |
|
1 year 2 months 12 days
|
|
|
|
|
| Performance Shares [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Total unrecognized compensation cost |
|
$ 0.2
|
|
|
|
|
| Total unrecognized compensation cost, period of recognition |
|
4 months 24 days
|
|
|
|
|
| Performance Shares [Member] | 2013 Incentive Stock Plan [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Shares granted |
112,651.64
|
|
|
|
|
|
| Performance period |
|
3 years
|
|
|
|
|
| Performance Shares [Member] | Minimum [Member] | 2013 Incentive Stock Plan [Member] | Three Years Period Award [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Percentage of shares vested |
0.00%
|
|
|
|
|
|
| Performance Shares [Member] | Maximum [Member] | 2013 Incentive Stock Plan [Member] | Three Years Period Award [Member] |
|
|
|
|
|
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
|
|
|
|
|
|
| Percentage of shares vested |
150.00%
|
|
|
|
|
|
|
|