Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Earnings Per Share Tables - Basic 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) | $ 33,718 | $ 130,294 | $ (142,052) | ||||||||
| Add: Noncontrolling interest in consolidated joint ventures | 1,018 | 651 | 1,044 | ||||||||
| 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 interests | (17,951) | ||||||||||
| Net income (loss) available to common shareholders for basic earnings per share | $ 5,234 | $ 117,224 | $ (125,752) | ||||||||
| Weighted average common shares | 90,005 | 89,746 | 89,291 | ||||||||
| 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 | $ 1.31 | $ (1.41) |
| Mack-Cali Realty LP [Member] | |||||||||||
| Stockolders Equity [Line Items] | |||||||||||
| Net income (loss) | $ 33,718 | $ 130,294 | $ (142,052) | ||||||||
| Add: Noncontrolling interest in consolidated joint ventures | 1,018 | 651 | 1,044 | ||||||||
| Deduct: Redeemable noncontrolling interest | (8,840) | ||||||||||
| Deduct: Redemption value adjustment of redeemable noncontrolling interests | (20,025) | ||||||||||
| Net income (loss) available to common shareholders for basic earnings per share | $ 5,871 | $ 130,945 | $ (141,008) | ||||||||
| Weighted average common units | 100,410 | 100,245 | 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 | $ 1.31 | $ (1.41) |