Consolidated Statements Of Operations - USD ($)
shares in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
REVENUES    
Revenue from leases $ 123,015,000 $ 125,693,000
Total revenues 134,249,000 138,967,000
EXPENSES    
Real estate taxes 17,077,000 18,361,000
Operating services 24,962,000 25,618,000
Real estate services expenses 4,266,000 4,936,000
Leasing personnel costs 742,000  
General and administrative 12,593,000 16,085,000
Depreciation and amortization 48,046,000 41,297,000
Total expenses 118,137,000 118,801,000
OTHER (EXPENSE) INCOME    
Interest expense (24,774,000) (20,075,000)
Interest and other investment income (loss) 824,000 1,128,000
Equity in earnings (loss) of unconsolidated joint ventures (681,000) 1,572,000
Gain on change of control of interests 13,790,000  
Realized gains (losses) and unrealized losses on disposition of rental property, net 268,109,000 58,186,000
Gain on sale of investment in unconsolidated joint venture 903,000  
Gain (loss) from extinguishment of debt, net 1,311,000 (10,289,000)
Total other income (expense) 259,482,000 30,522,000
Net income 275,594,000 50,688,000
Noncontrolling interests in consolidated joint ventures 1,248,000 30,000
Noncontrolling interests in Operating Partnership (27,680,000) (4,883,000)
Redeemable noncontrolling interests (4,667,000) (2,799,000)
Net income available to common shareholders $ 244,495,000 $ 43,036,000
Basic earnings per common share:    
Net income available to common shareholders $ 2.67 $ 0.45
Diluted earnings per common share:    
Net income available to common shareholders $ 2.66 $ 0.45
Basic weighted average shares outstanding 90,498 90,263
Diluted weighted average shares outstanding 100,943 100,604
Real Estate Services [Member]    
REVENUES    
Total revenues $ 3,842,000 $ 4,661,000
Parking Income [Member]    
REVENUES    
Total revenues 4,941,000 5,327,000
Hotel Income [Member]    
REVENUES    
Total revenues 283,000  
Other Income [Member]    
REVENUES    
Total revenues 2,168,000 3,286,000
Utilities [Member]    
EXPENSES    
Utilities 10,451,000 12,504,000
Mack-Cali Realty LP [Member]    
REVENUES    
Revenue from leases 123,015,000 125,693,000
Total revenues 134,249,000 138,967,000
EXPENSES    
Real estate taxes 17,077,000 18,361,000
Utilities 10,451,000 12,504,000
Operating services 24,962,000 25,618,000
Real estate services expenses 4,266,000 4,936,000
Leasing personnel costs 742,000  
General and administrative 12,593,000 16,085,000
Depreciation and amortization 48,046,000 41,297,000
Total expenses 118,137,000 118,801,000
OTHER (EXPENSE) INCOME    
Interest expense (24,774,000) (20,075,000)
Interest and other investment income (loss) 824,000 1,128,000
Equity in earnings (loss) of unconsolidated joint ventures (681,000) 1,572,000
Gain on change of control of interests 13,790,000  
Realized gains (losses) and unrealized losses on disposition of rental property, net 268,109,000 58,186,000
Gain on sale of investment in unconsolidated joint venture 903,000  
Gain (loss) from extinguishment of debt, net 1,311,000 (10,289,000)
Total other income (expense) 259,482,000 30,522,000
Net income 275,594,000 50,688,000
Noncontrolling interests in consolidated joint ventures 1,248,000 30,000
Redeemable noncontrolling interests (4,667,000) (2,799,000)
Net income available to common shareholders $ 272,175,000 $ 47,919,000
Basic earnings per common share:    
Net income available to common shareholders $ 2.67 $ 0.45
Diluted earnings per common share:    
Net income available to common shareholders $ 2.66 $ 0.45
Basic weighted average units outstanding 100,740 100,505
Diluted weighted average units outstanding 100,943 100,604
Mack-Cali Realty LP [Member] | Real Estate Services [Member]    
REVENUES    
Total revenues $ 3,842,000 $ 4,661,000
Mack-Cali Realty LP [Member] | Parking Income [Member]    
REVENUES    
Total revenues 4,941,000 5,327,000
Mack-Cali Realty LP [Member] | Hotel Income [Member]    
REVENUES    
Total revenues 283,000  
Mack-Cali Realty LP [Member] | Other Income [Member]    
REVENUES    
Total revenues $ 2,168,000 $ 3,286,000