Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2016
Estimated Useful Lives Of Assets

Leasehold interests

Remaining lease term

Buildings and improvements

5 to 40 years

Tenant improvements

The shorter of the term of the



related lease or useful life

Furniture, fixtures and equipment

5 to 10 years



Mack-Cali Realty LP [Member]  
Estimated Useful Lives Of Assets

Leasehold interests

Remaining lease term

Buildings and improvements

5 to 40 years

Tenant improvements

The shorter of the term of the



related lease or useful life

Furniture, fixtures and equipment

5 to 10 years