Quarterly report pursuant to Section 13 or 15(d)

Consolidated Balance Sheets (Parenthetical)

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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Allowance for doubtful accounts receivable $ 537 $ 1,138
Common stock, par value per share $ 0.01 $ 0.01
Common stock, shares authorized 190,000,000 190,000,000
Common stock, shares outstanding 90,307,280 89,914,113
Mack-Cali Realty LP [Member]    
Allowance for doubtful accounts receivable $ 537 $ 1,138
General partner common units outstanding 90,307,280 89,914,113
Limited partners common units outstanding 10,186,785 10,438,855