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Mack-Cali Realty Corporation Stockholders' Equity (Stock Options Plans) (Narrative) (Details) (USD $)
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1 Months Ended | 3 Months Ended | 3 Months Ended | 3 Months Ended | ||||||||||||||
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May 31, 2002
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Mar. 31, 2012
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Mar. 31, 2011
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Dec. 31, 2011
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Mar. 31, 2012
2004 Incentive Stock Plan [Member]
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May 31, 2004
2004 Incentive Stock Plan [Member]
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Dec. 31, 1994
Employee And Director Plan [Member]
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Mar. 31, 2012
Employee Plan [Member]
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Dec. 31, 1994
Employee Plan [Member]
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Dec. 31, 1994
Director Plan [Member]
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Mar. 31, 2012
1994 And 1995 Employee Plans [Member]
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Mar. 31, 2012
2000 Director Plan And Director Plan [Member]
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May 31, 2002
Maximum [Member]
Employee And Director Plan [Member]
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May 31, 2002
Maximum [Member]
2000 Employee Plan [Member]
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May 31, 2002
Maximum [Member]
2000 Director Plan [Member]
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May 31, 2002
Minimum [Member]
Employee And Director Plan [Member]
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May 31, 2002
Minimum [Member]
2000 Employee Plan [Member]
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May 31, 2002
Minimum [Member]
2000 Director Plan [Member]
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| Stock Option Activity [Line Items] | ||||||||||||||||||
| Reserved stocks for issuance | 2,500,000 | 5,380,188 | 4,980,188 | 400,000 | 4,350,000 | 4,000,000 | 350,000 | 2,700,000 | 2,500,000 | 200,000 | ||||||||
| Description of amendments to both 2000 stock option plans | shareholders of the Company approved amendments to both plans to increase the total shares reserved for issuance under both of the 2000 plans from 2,700,000 to 4,350,000 shares of the Company's common stock (from 2,500,000 to 4,000,000 shares under the 2000 Employee Plan and from 200,000 to 350,000 shares under the 2000 Director Plan). | |||||||||||||||||
| Shares issued | 0 | |||||||||||||||||
| Exercisable time period (years) | five | three | one | |||||||||||||||
| Stock option terms (years) | 10 | |||||||||||||||||
| Weighted average remaining contractual life (years) | 0.9 | 1.1 | ||||||||||||||||
| Proceeds from stock options exercised | $ 270,300 | |||||||||||||||||
| Total intrinsic value of options exercised | $ 0 | $ 44,000 | ||||||||||||||||