Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Diluted Computation Of EPS) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
|
| Stockolders Equity [Line Items] | |||||||||||
| Net income (loss) available to common shareholders for basic earnings per share | $ 5,234 | $ 117,224 | $ (125,752) | ||||||||
| Add (deduct): Noncontrolling interest in Operating Partnership | 2,711 | 13,721 | (15,256) | ||||||||
| Deduct: Redeemable noncontrolling interest | (8,840) | ||||||||||
| Deduct: Redemption value adjustment of redeemable noncontrolling interest in Operating Partnership | (2,074) | ||||||||||
| Net income (loss) for diluted earnings per share | $ 5,871 | $ 130,945 | $ (141,008) | ||||||||
| Weighted average common shares | 100,703 | 100,498 | 100,222 | ||||||||
| Net income (loss) available to common shareholders | $ (0.01) | $ 0.39 | $ (0.44) | $ 0.11 | $ 0.17 | $ (0.10) | $ 0.54 | $ 0.69 | $ 0.06 | $ 1.30 | $ (1.41) |
| Mack-Cali Realty LP [Member] | |||||||||||
| Stockolders Equity [Line Items] | |||||||||||
| Net income (loss) available to common shareholders for basic earnings per share | $ 5,871 | $ 130,945 | $ (141,008) | ||||||||
| Deduct: Redeemable noncontrolling interest | $ (8,840) | ||||||||||
| Weighted average common unit | 100,703 | 100,498 | 100,222 | ||||||||
| Net income (loss) available to common shareholders | $ (0.01) | $ 0.39 | $ (0.44) | $ 0.11 | $ 0.17 | $ (0.10) | $ 0.54 | $ 0.69 | $ 0.06 | $ 1.30 | $ (1.41) |