Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Segment Reporting (Schedule Of Reconciliation Of Net Operating Income To Net Income Available To Common Shareholders) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting Information [Line Items]                        
Net operating income [1]                 $ 216,835 $ 166,560 $ 149,615  
Depreciation and amortization $ (52,045) $ (48,117) $ (43,459) $ (43,063) $ (43,136) $ (44,099) $ (42,365) $ (40,802) (186,684) (170,402) (172,490)  
Gain on change of control of interests     5,191 10,156         15,347      
Realized gains (losses) and unrealized losses on disposition of rental property, net 41,002 (17,053) 27,117 58,600   18,718 34,399 144 109,666 53,261 54,848  
Gain on sale of investment in unconsolidated joint venture     5,670       6,448   5,670 6,448    
Loss from extinguishment of debt, net                 (30,540)   (582)  
Impairments         (33,743) [2] (164,176) [2]       (197,919)   $ (25,200)
Net income (loss) 16,764 (9,605) 54,366 68,769 (35,975) (142,141) 39,389 (3,325) 130,294 (142,052) 31,391  
Noncontrolling interest in consolidated joint ventures 191 65 (311) 706 462 (281) 373 490 651 1,044 778  
Noncontrolling interest in Operating Partnership (1,774) 999 (5,662) (7,284) 3,795 15,530 (4,383) 314 (13,721) 15,256 (3,602)  
Net income (loss) available to common shareholders 15,181 (8,541) 48,393 62,191 (31,718) (126,892) 35,379 (2,521) 117,224 (125,752) 28,567  
Mack-Cali Realty LP [Member]                        
Segment Reporting Information [Line Items]                        
Net operating income                 216,835 166,560 149,615  
Depreciation and amortization (52,045) (48,117) (43,459) (43,063) (43,136) (44,099) (42,365) (40,802) (186,684) (170,402) (172,490)  
Gain on change of control of interests     5,191 10,156         15,347      
Realized gains (losses) and unrealized losses on disposition of rental property, net 41,002 (17,053) 27,117 58,600   18,718 34,399 144 109,666 53,261 54,848  
Gain on sale of investment in unconsolidated joint venture     5,670       6,448   5,670 6,448    
Loss from extinguishment of debt, net                 (30,540)   (582)  
Impairments         (33,743) [2] (164,176) [2]       (197,919)    
Net income (loss) 16,764 (9,605) 54,366 68,769 (35,975) (142,141) 39,389 (3,325) 130,294 (142,052) 31,391  
Noncontrolling interest in consolidated joint ventures 191 65 (311) 706 462 (281) 373 490 651 1,044 778  
Net income (loss) available to common shareholders $ 16,955 $ (9,540) $ 54,055 $ 69,475 $ (35,513) $ (142,422) $ 39,762 $ (2,835) $ 130,945 $ (141,008) $ 32,169  
[1] Net operating income represents total revenues less total operating and interest expenses (as defined in Note "a"), plus equity in earnings (loss) of unconsolidated joint ventures, for the period.
[2] Amounts for the year ended December 31, 2015 relate to impairment charges as further described in Note 3: Recent Transactions - Impairments on Properties Held and Used.