Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders) (Details) - USD ($)
$ in Thousands |
3 Months Ended |
9 Months Ended |
Sep. 30, 2018 |
Sep. 30, 2017 |
Sep. 30, 2018 |
Sep. 30, 2017 |
| Segment Reporting Information [Line Items] |
|
|
|
|
| Net operating income |
$ 42,387
|
$ 55,174
|
$ 128,379
|
$ 165,295
|
| Depreciation and amortization |
(45,813)
|
(52,375)
|
(128,523)
|
(157,768)
|
| Gain on change of control of interests |
14,217
|
|
14,217
|
|
| Realized gains (losses) and unrealized losses on disposition of rental property, net |
(9,102)
|
31,336
|
50,094
|
(2,112)
|
| Gain on sale of investment in unconsolidated joint venture |
|
10,568
|
|
23,131
|
| Loss from extinguishment of debt, net |
|
|
(10,289)
|
(239)
|
| Net income |
1,689
|
44,703
|
53,878
|
28,307
|
| Noncontrolling interest in consolidated joint ventures |
451
|
447
|
576
|
865
|
| Noncontrolling interest in Operating Partnership |
167
|
(4,413)
|
(4,574)
|
(2,412)
|
| Redeemable noncontrolling interest |
(3,785)
|
(2,683)
|
(9,573)
|
(6,157)
|
| Net income (loss) available to common shareholders |
(1,478)
|
38,054
|
40,307
|
20,603
|
| Mack-Cali Realty LP [Member] |
|
|
|
|
| Segment Reporting Information [Line Items] |
|
|
|
|
| Net operating income |
42,387
|
55,174
|
128,379
|
165,295
|
| Depreciation and amortization |
(45,813)
|
(52,375)
|
(128,523)
|
(157,768)
|
| Gain on change of control of interests |
14,217
|
|
14,217
|
|
| Realized gains (losses) and unrealized losses on disposition of rental property, net |
(9,102)
|
31,336
|
50,094
|
(2,112)
|
| Gain on sale of investment in unconsolidated joint venture |
|
10,568
|
|
23,131
|
| Loss from extinguishment of debt, net |
|
|
(10,289)
|
(239)
|
| Net income |
1,689
|
44,703
|
53,878
|
28,307
|
| Noncontrolling interest in consolidated joint ventures |
451
|
447
|
576
|
865
|
| Redeemable noncontrolling interest |
(3,785)
|
(2,683)
|
(9,573)
|
(6,157)
|
| Net income (loss) available to common shareholders |
$ (1,645)
|
$ 42,467
|
$ 44,881
|
$ 23,015
|