Annual report pursuant to Section 13 and 15(d)

Mack-Cali Realty Corporation Stockholders' Equity (Deferred Stock Compensation Plan For Directors) (Narrative) (Details)

v2.4.1.9
Mack-Cali Realty Corporation Stockholders' Equity (Deferred Stock Compensation Plan For Directors) (Narrative) (Details)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]      
Maximum percentage of retainer fee that directors may defer 100.00%cli_MaximumPercentageOfRetainerFeeDirectorsMayElectToDeferToStockUnits    
Deferred stock units earned 20,261cli_DeferredStockUnitsSharesEarned 22,392cli_DeferredStockUnitsSharesEarned 17,834cli_DeferredStockUnitsSharesEarned
Deferred stock units outstanding 157,730cli_DeferredStockUnitsOutstanding 136,440cli_DeferredStockUnitsOutstanding