Consolidated Statements Of Changes In Equity - USD ($)
shares in Thousands, $ in Thousands
Mack-Cali Realty LP [Member]
General Partner Common Units [Member]
Mack-Cali Realty LP [Member]
Limited Partner Common Units/Vested LTIP Units [Member]
Mack-Cali Realty LP [Member]
General Partner Common Unitholders [Member]
Mack-Cali Realty LP [Member]
Limited Partner Common Unitholders [Member]
Mack-Cali Realty LP [Member]
Noncontrolling Interest In Consolidated Joint Ventures [Member]
Mack-Cali Realty LP [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Mack-Cali Realty LP [Member]
General Partner Common Unitholders [Member]
Common Stock [Member]
Additional Paid-In Capital [Member]
Dividends In Excess Of Net Earnings [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interests In Subsidiaries [Member]
Total
Balance, value at Dec. 31, 2018                 $ 903 $ 2,561,503 $ (1,084,518) $ 8,770 $ 210,523 $ 1,697,181
Balance, shares at Dec. 31, 2018                 90,320          
Balance, value at Dec. 31, 2018     $ 1,413,497 $ 232,764 $ 42,150 $ 8,770 $ 1,697,181              
Balance, units at Dec. 31, 2018 90,320 10,229                        
Net income (loss)     244,495 27,680 3,419   275,594       244,495   31,099 275,594
Common stock dividends                     (18,065)     (18,065)
Common unit distributions     (18,065) (1,696)     (19,761) $ (18,065)         (1,696) (1,696)
Redeemable noncontrolling interests     (3,152) (357) (4,667)   (8,176)     (3,152)     (5,024) (8,176)
Issuance of limited partner common units     (1,958)   9,418   7,460     (1,958)     9,418 7,460
Vested LTIP units, shares   77                        
Redemption of common units for common stock, value     82 (82)       82   82     (82)  
Redemption of common units for common stock, shares 5 4             5          
Redemption of common units, value     (1,665) (4,965)     (6,630) (1,665)   (1,665)     (4,965) (6,630)
Redemption of common units, shares   (301)                        
Shares issued under Dividend Reinvestment and Stock Purchase Plan, value     10       10     10       10
Shares issued under Dividend Reinvestment and Stock Purchase Plan, value               10            
Shares issued under Dividend Reinvestment and Stock Purchase Plan, shares 1               1          
Directors' deferred compensation plan, value     130       130 130   130       130
Stock compensation, value     265 1,615     1,880     265     1,615 1,880
Cancellation of unvested LTIP units, value     2,819 (2,889)     (70)       2,819   (2,889) (70)
Other comprehensive income (loss)     (390) (413)   (3,648) (4,451) (4,038)     (390) (3,648) (413) (4,451)
Rebalancing of ownership percentage between parent and subsidiaries               (1,563)   (1,563)     1,563  
Balance, value at Mar. 31, 2019                 $ 903 2,553,652 (855,659) 5,122 239,149 1,943,167
Balance, shares at Mar. 31, 2019                 90,326          
Balance, value at Mar. 31, 2019     1,636,068 251,657 50,320 5,122 1,943,167              
Balance, units at Mar. 31, 2019 90,326 10,009                        
Balance, value at Dec. 31, 2019                 $ 906 2,535,440 (1,042,629) (18) 205,776 1,699,475
Balance, shares at Dec. 31, 2019                 90,595          
Balance, value at Dec. 31, 2019     1,427,568 224,629 47,296 (18) 1,699,475              
Balance, units at Dec. 31, 2019 90,595 9,612                        
Net income (loss)     (39,924) (4,215) 6,295   (37,844)       (39,924)   2,080 (37,844)
Common stock dividends                     (18,119)     (18,119)
Common unit distributions     (18,119) (2,270)     (20,389) (18,119)         (2,270) (2,270)
Redeemable noncontrolling interests     (2,804) (296) (6,471)   (9,571)     (2,804)     (6,767) (9,571)
Change in noncontrolling interests in consolidated joint ventures         216   216           216 216
Vested LTIP units, shares   4                        
Redemption of common units for common stock, value       (2,141)     (2,141)           (2,141) (2,141)
Redemption of common units for common stock, shares   (98)                        
Redemption of common units, value                         (2,141)  
Shares issued under Dividend Reinvestment and Stock Purchase Plan, value     19       19     19       19
Shares issued under Dividend Reinvestment and Stock Purchase Plan, value               19            
Shares issued under Dividend Reinvestment and Stock Purchase Plan, shares 1               1          
Directors' deferred compensation plan, value     82       82 82   82       82
Stock compensation, value     430 2,100     2,530     430     2,100 2,530
Cancellation of unvested LTIP units, value       (201)     (201)           (201) (201)
Other comprehensive income (loss)       (34)   $ 18 (16) 18       $ 18 (34) (16)
Rebalancing of ownership percentage between parent and subsidiaries               $ 742   742     (742)  
Balance, value at Mar. 31, 2020                 $ 906 $ 2,533,909 $ (1,100,672)   $ 198,017 $ 1,632,160
Balance, shares at Mar. 31, 2020                 90,596          
Balance, value at Mar. 31, 2020     $ 1,367,252 $ 217,572 $ 47,336   $ 1,632,160              
Balance, units at Mar. 31, 2020 90,596 9,518