Quarterly report pursuant to Section 13 or 15(d)

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Basic Computation Of EPS) (Details)

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Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Basic Computation Of EPS) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Stockolders Equity [Line Items]    
Net income (loss) $ (32,091) $ 267,366
Add (deduct): Noncontrolling interests in consolidated joint ventures 176 1,248
Add (deduct): Noncontrolling interests in Operating Partnership 3,666 (26,843)
Add (deduct): Redeemable noncontrolling interests (6,471) (4,667)
Add (deduct): Redemption value adjustment of redeemable noncontrolling interests attributable to common shareholders (2,804) (3,152)
Income (loss) from continuing operations available to common shareholders (37,524) 233,952
Income (loss) from discontinued operations available to common shareholders (5,204) 7,391
Net income (loss) available to common shareholders for basic earnings per share $ (42,728) $ 241,343
Weighted average common shares 90,616 90,498
Income (loss) from continuing operations available to common shareholders $ (0.41) $ 2.59
Income (loss) from discontinued operations available to common shareholders (0.06) 0.08
Net income available to common unitholders $ (0.47) $ 2.67
Mack-Cali Realty LP [Member]    
Stockolders Equity [Line Items]    
Net income (loss) $ (32,091) $ 267,366
Add (deduct): Noncontrolling interests in consolidated joint ventures 176 1,248
Add (deduct): Redeemable noncontrolling interests (6,471) (4,667)
Add (deduct): Redemption value adjustment of redeemable noncontrolling interests attributable to common shareholders (3,100) (3,509)
Income (loss) from continuing operations available to common shareholders (41,486) 260,438
Income (loss) from discontinued operations available to common shareholders (5,753) 8,228
Net income (loss) available to common shareholders for basic earnings per share $ (47,239) $ 268,666
Weighted average common units 100,183 100,740
Income (loss) from continuing operations available to common shareholders $ (0.41) $ 2.59
Income (loss) from discontinued operations available to common shareholders (0.06) 0.08
Net income available to common unitholders $ (0.47) $ 2.67