Quarterly report pursuant to Section 13 or 15(d)

Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Basic Computation Of EPS) (Details)

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Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Basic Computation Of EPS) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]    
Net loss $ (3,325)us-gaap_ProfitLoss $ (17,628)us-gaap_ProfitLoss
Add: Noncontrolling interest in consolidated joint ventures 490us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable 322us-gaap_NoncontrollingInterestInNetIncomeLossJointVenturePartnersNonredeemable
Add (deduct): Noncontrolling interest in Operating Partnership 314us-gaap_NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable 2,008us-gaap_NoncontrollingInterestInNetIncomeLossOperatingPartnershipsNonredeemable
Net loss available to common shareholders $ (2,521)us-gaap_NetIncomeLoss $ (15,298)us-gaap_NetIncomeLoss
Weighted average common shares 89,192us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 88,289us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Net loss available to common shareholders $ (0.03)us-gaap_EarningsPerShareBasic $ (0.17)us-gaap_EarningsPerShareBasic