Noncontrolling Interests In Subsidiaries (Narrative) (Details)
$ in Millions |
6 Months Ended |
|
|
Jun. 30, 2017
USD ($)
property
shares
|
Dec. 31, 2016 |
| Noncontrolling Interest [Line Items] |
|
|
| Number of common shares received upon redemption of common units | shares |
1
|
|
| Rebalance of ownership percentage |
$ 2.9
|
|
| Percentage of noncontrolling interest |
10.40%
|
10.50%
|
| Cash consideration |
$ 2.0
|
|
| Issuance of common units | shares |
99,412
|
|
| Common unit value |
$ 2.8
|
|
| Participation Rights [Member] |
|
|
| Noncontrolling Interest [Line Items] |
|
|
| Number of properties | property |
3
|
|
| Excess net cash flow remaining after the distribution to the Company |
50.00%
|
|
| Internal rate of return |
10.00%
|
|
| 150 Main St [Member] |
|
|
| Noncontrolling Interest [Line Items] |
|
|
| Cash consideration |
$ 2.0
|
|
| Issuance of common units | shares |
99,412
|
|
| Common unit value |
$ 2.8
|
|
| Mack-Cali Realty LP [Member] |
|
|
| Noncontrolling Interest [Line Items] |
|
|
| Cash consideration |
$ 2.0
|
|
| Issuance of common units | shares |
99,412
|
|
| Common unit value |
$ 2.8
|
|
| Future Developments [Member] | Participation Rights [Member] |
|
|
| Noncontrolling Interest [Line Items] |
|
|
| Number of properties | property |
1
|
|