Mack-Cali Realty Corporation Stockholders' Equity And Mack-Cali Realty, L.P.'s Partners' Capital (Schedule Of Weighted Average Assumptions) (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2015 | |
| Time Vesting Options [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Expected life (in years) | 6 years |
| Risk-free interest rate | 2.04% |
| Volatility | 29.00% |
| Dividend yield | 3.50% |
| Price Vesting Options [Member] | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Expected life (in years) | 5 years 9 months 18 days |
| Risk-free interest rate | 1.96% |
| Volatility | 29.00% |
| Dividend yield | 3.50% |