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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, 2013
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Sep. 30, 2013
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Jun. 30, 2013
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Mar. 31, 2013
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Dec. 31, 2012
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Sep. 30, 2012
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Jun. 30, 2012
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Mar. 31, 2012
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Anti-dilutive securities excluded from the computation of earnings per share | 15,000 | 183,870 | 15,000 | |||||||||||||
| Unvested restricted stock outstanding | 153,560 | [1] | 134,328 | 153,560 | [1] | 134,328 | 187,447 | 239,759 | ||||||||
| Dividends declared per common share | $ 0.30 | $ 0.30 | $ 0.30 | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 0.45 | $ 1.35 | $ 1.80 | $ 1.80 | |||||
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Restricted Stock [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||||||
| Anti-dilutive securities excluded from the computation of earnings per share | 409,294 | |||||||||||||||
| Unvested restricted stock outstanding | 409,294 | 134,328 | 409,294 | 134,328 | 187,447 | |||||||||||
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