Annual report pursuant to Section 13 and 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
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Basic EPS shares 89,746 89,291 88,727
Add: Operating Partnership - common units 10,499 10,931 11,272
Restricted Stock Awards 43   42
Stock Options 210    
Diluted EPS Shares 100,498 100,222 100,041
Mack-Cali Realty LP [Member]      
Basic weighted average units outstanding 100,245 100,222 99,999
Restricted Stock Awards 43   42
Stock Options 210    
Diluted weighted average units outstanding 100,498 100,222 100,041