Quarterly report pursuant to Section 13 or 15(d)

Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Reconciliation Of Shares Used In Basic EPS Calculation To Shares Used In Diluted EPS Calculation) (Details)

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Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Reconciliation Of Shares Used In Basic EPS Calculation To Shares Used In Diluted EPS Calculation) (Details) - shares
shares in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Stockolders Equity [Line Items]        
Basic EPS shares 90,011 89,740 89,983 89,731
Basic weighted average units outstanding     100,354 100,235
Add: Operating Partnership - common units 10,359 10,499 10,371 10,504
Restricted Stock Awards   55   52
Stock Options   107   72
Diluted EPS Shares 100,370 100,401 100,354 100,359
Diluted weighted average units outstanding     100,354 100,359
Mack-Cali Realty LP [Member]        
Stockolders Equity [Line Items]        
Basic weighted average units outstanding 100,370 100,239 100,354 100,235
Restricted Stock Awards   55    
Stock Options   107    
Diluted weighted average units outstanding 100,370 100,401 100,354 100,359