Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Restricted Stock Awards) (Narrative) (Details) |
9 Months Ended |
|---|---|
|
Sep. 30, 2021
shares
| |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Performance period | 3 years |
| Unvested Restricted Stock [Member] | Board Member [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Unvested stock outstanding | 39,529 |
| Unvested Restricted Stock [Member] | Non-Executive Employees [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 3 years |
| Unvested stock outstanding | 208,769 |