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, 2019
Mar. 31, 2018
Stockolders Equity [Line Items]    
Net income $ 275,594 $ 50,688
Add (deduct): Noncontrolling interests in consolidated joint ventures 1,248 30
Add (deduct): Noncontrolling interests in Operating Partnership (27,680) (4,883)
Add (deduct): Redeemable noncontrolling interests (4,667) (2,799)
Add (deduct): Redemption value adjustment of redeemable noncontrolling interests attributable to common shareholders (3,152) (2,754)
Net income available to common shareholders for basic earnings per share $ 241,343 $ 40,282
Weighted average common shares 90,498 90,263
Net income available to common shareholders $ 2.67 $ 0.45
Mack-Cali Realty LP [Member]    
Stockolders Equity [Line Items]    
Net income $ 275,594 $ 50,688
Add (deduct): Noncontrolling interests in consolidated joint ventures 1,248 30
Add (deduct): Redeemable noncontrolling interests (4,667) (2,799)
Add (deduct): Redemption value adjustment of redeemable noncontrolling interests attributable to common shareholders (3,509) (3,067)
Net income available to common shareholders for basic earnings per share $ 268,666 $ 44,852
Weighted average common units 100,740 100,505
Net income available to common shareholders $ 2.67 $ 0.45