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Mack-Cali Realty Corporation Stockholders' Equity (Preferred And Common Stock And Repurchase Of General Partner Units) (Narrative) (Details) (USD $)
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0 Months Ended |
12 Months Ended |
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Feb. 18, 2011
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Dec. 31, 2011
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Oct. 28, 2011
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Oct. 27, 2011
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Jan. 05, 2011
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Dec. 31, 2010
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| Stock Option Activity [Line Items] |
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| Maximum percentage of outstanding share owned by REIT |
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50.00% |
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| Preferred stock, shares outstanding |
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0 |
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10,000 |
10,000 |
10,000 |
| Amount of depositary shares converted from the preferred shares |
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1,000,000 |
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| Depositary shares value, per share |
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$ 25 |
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| One depositary share equivalent of one Series C Preferred Stock |
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1/100th |
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| Preferred stock, redemption price per share |
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$ 2,500 |
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| Write off of preferred stock issuance costs |
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$ 164,000 |
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| Net proceeds from common stock issuance |
227,400,000 |
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| Maximum cash investments |
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5,000 |
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Repurchase Of Equity [Member]
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| Stock Option Activity [Line Items] |
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| Capacity of share repurchase program |
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150,000,000 |
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| Date share repurchase program was initiated |
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September 12, 2007 |
| Stock repurchased and retired shares |
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2,893,630 |
| Aggregate cost of stocks repurchased |
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104,000,000 |
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| Capacity available for additional repurchase of outstanding common stock |
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$ 46,000,000 |
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Dividend Reinvestment And Stock Purchase Plan [Member]
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| Stock Option Activity [Line Items] |
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| Reserved stocks for issuance |
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5,500,000 |
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Common Stock [Member]
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| Stock Option Activity [Line Items] |
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| Shares of common stock issued in public offering |
7,187,500 |
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