Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Basic Computation Of EPS) (Details) (USD $)
In Thousands, except Per Share data | 3 Months Ended | 9 Months Ended |
|---|
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 |
|---|
| Mack-Cali Realty Corporation Stockholders' Equity [Abstract] | | | | |
| Income from continuing operations | $ 24,083 | $ 15,581 | $ 62,949 | $ 50,518 |
| Noncontrolling interest in consolidated joint ventures | 96 | 108 | 308 | 281 |
| Noncontrolling interest in operating partnership | (3,015) | (2,150) | (8,031) | (7,047) |
| Preferred stock dividends | (664) | (500) | (1,664) | (1,500) |
| Income from continuing operations available to common shareholders | 20,500 | 13,039 | 53,562 | 42,252 |
| Income (loss) from discontinued operations available to common shareholders | | | | 4,021 |
| Net income available to common shareholders | $ 20,500 | $ 13,039 | $ 53,562 | $ 46,273 |
| Weighted average common shares | 87,019 | 79,304 | 85,649 | 79,161 |
| Income from continuing operations available to common shareholders | $ 0.24 | $ 0.16 | $ 0.63 | $ 0.53 |
| Income (loss) from discontinued operations available to common shareholders | | | | $ 0.05 |
| Net income available to common shareholders | $ 0.24 | $ 0.16 | $ 0.63 | $ 0.58 |