Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.20.2
Consolidated Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2020
Dec. 31, 2019
Common stock, par value per share $ 0.01 $ 0.01
Common stock, shares authorized 190,000,000 190,000,000
Common stock, shares outstanding 90,712,055 90,595,176
Mack-Cali Realty LP [Member]    
General Partner common units outstanding 90,712,055 90,595,176
Limited partners common units outstanding 9,672,558 9,612,064