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) (Narrative) (Details)

v3.5.0.2
Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share) (Narrative) (Details) - $ / shares
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Anti-dilutive securities excluded from the computation of earnings per share     0 405,000  
Dividends declared per common share $ 0.15 $ 0.15 $ 0.45 $ 0.45  
Unvested restricted stock outstanding 107,749   107,749   136,220
Unvested Restricted Stock [Member]          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Unvested restricted stock outstanding 82,716 99,006 82,716 99,006