Quarterly report pursuant to Section 13 or 15(d)

Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders) (Details)

v3.20.2
Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Segment Reporting Information [Line Items]        
Net operating income $ 1,453,000 $ 10,878,000 $ 11,523,000 $ 25,665,000
Depreciation and amortization (27,341,000) (31,971,000) (61,137,000) (63,505,000)
Land and other impairments (16,846,000) (2,499,000) (22,109,000) (2,499,000)
Gain on change of control of interests       13,790,000
Realized gains (losses) and unrealized losses on disposition of rental property, net   255,000 (7,915,000) 268,364,000
Gain on disposition of developable land   270,000 4,813,000 270,000
Gain on sale of investment in unconsolidated joint venture       903,000
Gain from extinguishment of debt, net 0 588,000 0 1,899,000
Income (loss) from continuing operations (42,734,000) (22,479,000) (74,825,000) 244,887,000
Income from discontinued operations 21,729,000 7,952,000 43,722,000 16,180,000
Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net (11,929,000) (5,802,000) (39,675,000) (5,802,000)
Total discontinued operations, net 9,800,000 2,150,000 4,047,000 10,378,000
Net income (loss) (32,934,000) (20,329,000) (70,778,000) 255,265,000
Noncontrolling interests in consolidated joint ventures 829,000 847,000 1,005,000 2,095,000
Noncontrolling interests in Operating Partnership income from continuing operations 4,626,000 2,647,000 8,292,000 (24,196,000)
Noncontrolling interests in Operating Partnership in discontinued operations (937,000) (213,000) (388,000) (1,050,000)
Redeemable noncontrolling interests (6,471,000) (5,006,000) (12,942,000) (9,673,000)
Net income (loss) available to common shareholders (34,887,000) (22,054,000) (74,811,000) 222,441,000
Mack-Cali Realty LP [Member]        
Segment Reporting Information [Line Items]        
Net operating income 1,453,000 10,878,000 11,523,000 25,665,000
Depreciation and amortization (27,341,000) (31,971,000) (61,137,000) (63,505,000)
Land and other impairments (16,846,000) (2,499,000) (22,109,000) (2,499,000)
Gain on change of control of interests       13,790,000
Realized gains (losses) and unrealized losses on disposition of rental property, net   255,000 (7,915,000) 268,364,000
Gain on disposition of developable land   270,000 4,813,000 270,000
Gain on sale of investment in unconsolidated joint venture       903,000
Gain from extinguishment of debt, net   588,000   1,899,000
Income (loss) from continuing operations (42,734,000) (22,479,000) (74,825,000) 244,887,000
Income from discontinued operations 21,729,000 7,952,000 43,722,000 16,180,000
Realized gains (losses) and unrealized losses on disposition of rental property and impairments, net (11,929,000) (5,802,000) (39,675,000) (5,802,000)
Total discontinued operations, net 9,800,000 2,150,000 4,047,000 10,378,000
Net income (loss) (32,934,000) (20,329,000) (70,778,000) 255,265,000
Noncontrolling interests in consolidated joint ventures 829,000 847,000 1,005,000 2,095,000
Redeemable noncontrolling interests (6,471,000) (5,006,000) (12,942,000) (9,673,000)
Net income (loss) available to common shareholders $ (38,576,000) $ (24,488,000) $ (82,715,000) $ 247,687,000