Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Basic Computation Of EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2016 |
Mar. 31, 2015 |
|
| Mack-Cali Realty Corporation Stockholders' Equity [Abstract] | ||
| Basic EPS, Net income (loss) | $ 68,769 | $ (3,325) |
| Add: Noncontrolling interest in consolidated joint ventures | 706 | 490 |
| Add (deduct): Noncontrolling interest in Operating Partnership | (7,284) | 314 |
| Income (loss) available to common unitholders | 62,191 | (2,521) |
| Net income (loss) available to common shareholders | $ 62,191 | $ (2,521) |
| Weighted average common shares | 89,721 | 89,192 |
| Net income available to common shareholders | $ 0.69 | $ (0.03) |