Mack-Cali Realty Corporation Stockholders' Equity (Earnings Per Share Tables - Diluted 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] | ||
| Income (loss) available to common unitholders | $ 62,191 | $ (2,521) |
| Add (deduct): Noncontrolling interest in Operating Partnership | 7,284 | (314) |
| Net income (loss) for diluted earnings per share | $ 69,475 | $ (2,835) |
| Weighted average common shares | 100,315 | 100,266 |
| Net income (loss) available to common shareholders | $ 0.69 | $ (0.03) |