Consolidated Statement Of Changes In Equity - 6 months ended Jun. 30, 2017 - 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 [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]
Accumulated Other Comprehensive Income (Loss) [Member]
Mack-Cali Realty LP [Member]
Noncontrolling Interests In Subsidiaries [Member]
Mack-Cali Realty LP [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, 2016               $ 897 $ 2,576,473 $ (1,052,184) $ 1,985 $ 199,516 $ 1,726,687
Balance, shares at Dec. 31, 2016               89,697          
Balance, value at Dec. 31, 2016   $ 10,488 $ 1,467,569 $ 236,187 $ 1,985 $ 20,946 $ 1,726,687            
Balance, units at Dec. 31, 2016 89,697                        
Net income (loss) (17,451) (2,001) 3,056 (16,396) (17,451) 1,055 (16,396)
Common stock dividends               (31,464) (31,464)
Common unit distributions (31,464) (3,961) (35,425) (3,961) (3,961)
Issuance of limited partner common units 99 2,793 2,793 2,793 2,793
Redeemable noncontrolling interest (12,411) (1,432) (3,474) (17,317) (12,411) (4,906) (17,317)
Decrease in noncontrolling interest in consolidated joint ventures (3,740) (1,081) (4,821) (3,740) (1,081) (4,821)
Redemption of common units for common stock, value   (149) 2,531 (2,531) $ 1 2,530 (2,531)
Redemption of common units for common stock, shares 149             149          
Shares issued under Dividend Reinvestment and Stock Purchase Plan, value   42 42 42 42
Shares issued under Dividend Reinvestment and Stock Purchase Plan, shares 1             1          
Directors' deferred compensation plan, value   236 236 236 236
Directors' deferred compensation plan, shares                      
Stock compensation, value   1,126 1,973 3,099 $ 1 1,125 1,973 3,099
Stock compensation, shares 70             70          
Cancellation of restricted shares, value   (146) (146) (146) (146)
Cancellation of restricted shares, shares (3)             (3)          
Other comprehensive income (loss) (13) (113) (126) (113) (13) (126)
Rebalancing of ownership percentage between parent and subsidiaries               2,888 (2,888)
Balance, value at Jun. 30, 2017               $ 899 $ 2,566,997 $ (1,101,099) $ 1,872 $ 189,957 $ 1,658,626
Balance, shares at Jun. 30, 2017               89,914          
Balance, value at Jun. 30, 2017   $ 10,438 $ 1,406,292 $ 231,015 $ 1,872 $ 19,447 $ 1,658,626            
Balance, units at Jun. 30, 2017 89,914