Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
6 Months Ended |
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
| Segment Reporting Information [Line Items] |
|
|
|
|
| Net operating income |
$ 41,904
|
$ 57,591
|
$ 85,992
|
$ 110,121
|
| Depreciation and amortization |
(41,413)
|
(57,762)
|
(82,710)
|
(105,393)
|
| Realized gains (losses) and unrealized losses on disposition of rental property, net |
1,010
|
(38,954)
|
59,196
|
(33,448)
|
| Gain on sale of investment in unconsolidated joint venture |
|
|
|
12,563
|
| Loss from extinguishment of debt, net |
|
|
(10,289)
|
(239)
|
| Net income (loss) |
1,501
|
(39,125)
|
52,189
|
(16,396)
|
| Noncontrolling interest in consolidated joint ventures |
95
|
181
|
125
|
418
|
| Noncontrolling interest in Operating Partnership |
142
|
4,296
|
(4,741)
|
2,001
|
| Redeemable noncontrolling interest |
(2,989)
|
(2,682)
|
(5,788)
|
(3,474)
|
| Net income (loss) available to common shareholders |
(1,251)
|
(37,330)
|
41,785
|
(17,451)
|
| Mack-Cali Realty LP [Member] |
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
| Net operating income |
41,904
|
57,591
|
85,992
|
110,121
|
| Depreciation and amortization |
(41,413)
|
(57,762)
|
(82,710)
|
(105,393)
|
| Realized gains (losses) and unrealized losses on disposition of rental property, net |
1,010
|
(38,954)
|
59,196
|
(33,448)
|
| Gain on sale of investment in unconsolidated joint venture |
|
|
|
12,563
|
| Loss from extinguishment of debt, net |
|
|
(10,289)
|
(239)
|
| Net income (loss) |
1,501
|
(39,125)
|
52,189
|
(16,396)
|
| Noncontrolling interest in consolidated joint ventures |
95
|
181
|
125
|
418
|
| Redeemable noncontrolling interest |
(2,989)
|
(2,682)
|
(5,788)
|
(3,474)
|
| Net income (loss) available to common shareholders |
$ (1,393)
|
$ (41,626)
|
$ 46,526
|
$ (19,452)
|