Annual report pursuant to Section 13 and 15(d)

Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Basic And Diluted Earnings Per Share) (Details)

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Mack-Cali Realty Corporation Stockholders' Equity (Schedule Of Basic And Diluted Earnings Per Share) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Mack-Cali Realty Corporation Stockholders' Equity [Abstract]                      
Income from continuing operations available to common shareholders                 $ 69,684 $ 48,879 $ 66,701
Add: Noncontrolling interest in Operating Partnerships 2,338 3,015 2,560 2,456 1,086 2,150 2,475 2,422 10,369 8,133 12,550
Income from continuing operations for diluted earnings per share                 80,053 57,012 79,251
Income (loss) from discontinued operations for diluted earnings per share             4,458 231   4,689 (16,580)
Net income available to common shareholders                 $ 80,053 $ 61,701 $ 62,671
Weighted average common shares                 98,962 92,477 88,389
Income from continuing operations available to common shareholders $ 0.18 $ 0.24 $ 0.20 $ 0.19 $ 0.09 $ 0.16 $ 0.19 $ 0.18 $ 0.81 $ 0.62 $ 0.90
Income (loss) from discontinued operations available to common shareholders             $ 0.05     $ 0.05 $ (0.19)
Net income available to common shareholders $ 0.18 $ 0.24 $ 0.20 $ 0.19 $ 0.09 $ 0.16 $ 0.24 $ 0.18 $ 0.81 $ 0.67 $ 0.71