Annual report pursuant to Section 13 and 15(d)

Mack-Cali Realty Corporation Stockholders' Equity (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 (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, 2015
Dec. 31, 2014
Dec. 31, 2013
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]      
Basic EPS shares 89,291 88,727 87,762
Add: Operating Partnership - common units 10,931 11,272 12,023
Restricted Stock Awards   42  
Diluted EPS Shares 100,222 100,041 99,785