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Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share) (Narrative) (Details) (USD $)
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3 Months Ended | 12 Months Ended | ||||||||||
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2010
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Sep. 30, 2010
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Jun. 30, 2010
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Mar. 31, 2010
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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Dec. 31, 2008
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| Shareholders Equity [Line Items] | ||||||||||||
| Unvested restricted stock outstanding | 187,447 | 239,759 | 187,447 | 239,759 | 323,088 | 375,006 | ||||||
| Dividends declared per common share | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 1.80 | $ 1.8 | $ 1.8 | |
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Stock Options [Member]
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| Shareholders Equity [Line Items] | ||||||||||||
| Anti-dilutive securities | 15,000 | 15,000 | 307,184 | |||||||||
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Restricted Stock [Member]
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| Shareholders Equity [Line Items] | ||||||||||||
| Unvested restricted stock outstanding | 187,447 | 239,759 | 187,447 | 239,759 | 323,088 | |||||||
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Aggregate dividends declared during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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