Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
Mar. 31, 2020 |
Mar. 31, 2019 |
| Segment Reporting Information [Line Items] |
|
|
| Net operating income |
$ 10,070
|
$ 14,787
|
| Depreciation and amortization |
(33,796)
|
(31,534)
|
| Land and other Impairments |
(5,263)
|
|
| Gain on change of control of interests |
|
13,790
|
| Realized gains (losses) and unrealized losses on disposition of rental property, net |
(7,915)
|
268,109
|
| Gain on disposition of developable land |
4,813
|
|
| Gain on sale of investment in unconsolidated joint venture |
|
903
|
| Gain from extinguishment of debt, net |
|
1,311
|
| Income (loss) from continuing operations |
(32,091)
|
267,366
|
| Income from discontinued operations |
21,993
|
8,228
|
| Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net |
(27,746)
|
|
| Total discontinued operations, net |
(5,753)
|
8,228
|
| Net income (loss) |
(37,844)
|
275,594
|
| Noncontrolling interests in consolidated joint ventures |
176
|
1,248
|
| Noncontrolling interests in Operating Partnership |
3,666
|
(26,843)
|
| Noncontrolling interest in discontinued operations |
549
|
(837)
|
| Redeemable noncontrolling interests |
(6,471)
|
(4,667)
|
| Net income (loss) available to common shareholders |
(39,924)
|
244,495
|
| Mack-Cali Realty LP [Member] |
|
|
| Segment Reporting Information [Line Items] |
|
|
| Net operating income |
10,070
|
14,787
|
| Depreciation and amortization |
(33,796)
|
(31,534)
|
| Land and other Impairments |
(5,263)
|
|
| Gain on change of control of interests |
|
13,790
|
| Realized gains (losses) and unrealized losses on disposition of rental property, net |
(7,915)
|
268,109
|
| Gain on disposition of developable land |
4,813
|
|
| Gain on sale of investment in unconsolidated joint venture |
|
903
|
| Gain from extinguishment of debt, net |
|
1,311
|
| Income (loss) from continuing operations |
(32,091)
|
267,366
|
| Income from discontinued operations |
21,993
|
8,228
|
| Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net |
(27,746)
|
|
| Total discontinued operations, net |
(5,753)
|
8,228
|
| Net income (loss) |
(37,844)
|
275,594
|
| Noncontrolling interests in consolidated joint ventures |
176
|
1,248
|
| Redeemable noncontrolling interests |
(6,471)
|
(4,667)
|
| Net income (loss) available to common shareholders |
$ (44,139)
|
$ 272,175
|