Related Party Transactions	12 Months Ended
Dec. 31, 2017
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Alexander’s, Inc. We own 32.4% of Alexander’s. Steven Roth, the Chairman of Vornado’s Board of Trustee’s and its Chief Executive Officer is also the Chairman of the Board and Chief Executive Officer of Alexander’s. We provide various services to Alexander’s in accordance with management, development and leasing agreements. These agreements are described in Note 5 - Investments in Partially Owned Entities. Urban Edge Properties We own 4.5% of UE. In 2017 and 2016, we provided UE with information technology support. UE is providing us with leasing, development and property management services for (i) certain small retail properties that we plan to sell and (ii) our affiliate, Alexander's, Rego retail assets. Fees to UE for servicing the retail assets of Alexander’s are similar to the fees that we are receiving from Alexander’s as described in Note 5 - Investments in Partially Owned Entities. Interstate Properties (“Interstate”) Interstate is a general partnership in which Mr. Roth is the managing general partner. David Mandelbaum and Russell B. Wight, Jr., Trustees of Vornado and Directors of Alexander’s, are Interstate’s two other general partners. As of December 31, 2017, Interstate and its partners beneficially owned an aggregate of approximately 7.2% of the common shares of beneficial interest of Vornado and 26.2% of Alexander’s common stock. We manage and lease the real estate assets of Interstate pursuant to a management agreement for which we receive an annual fee equal to 4% of annual base rent and percentage rent. The management agreement has a term of 1 year and is automatically renewable unless terminated by either of the parties on 60 days’ notice at the end of the term. We believe, based upon comparable fees charged by other real estate companies, that the management agreement terms are fair to us. We earned $501,000, $521,000, and $541,000 of management fees under the agreement for the years ended December 31, 2017, 2016 and 2015, respectively.

Related Party Transactions

Alexander’s, Inc.

We own 32.4% of Alexander’s. Steven Roth, the Chairman of Vornado’s Board of Trustee’s and its Chief Executive Officer is also the Chairman of the Board and Chief Executive Officer of Alexander’s. We provide various services to Alexander’s in accordance with management, development and leasing agreements. These agreements are described in Note 5 - Investments in Partially Owned Entities.

Urban Edge Properties

We own 4.5% of UE. In 2017 and 2016, we provided UE with information technology support. UE is providing us with leasing, development and property management services for (i) certain small retail properties that we plan to sell and (ii) our affiliate, Alexander's, Rego retail assets. Fees to UE for servicing the retail assets of Alexander’s are similar to the fees that we are receiving from Alexander’s as described in Note 5 - Investments in Partially Owned Entities.

Interstate Properties (“Interstate”)

Interstate is a general partnership in which Mr. Roth is the managing general partner. David Mandelbaum and Russell B. Wight, Jr., Trustees of Vornado and Directors of Alexander’s, are Interstate’s two other general partners. As of December 31, 2017, Interstate and its partners beneficially owned an aggregate of approximately 7.2% of the common shares of beneficial interest of Vornado and 26.2% of Alexander’s common stock.

We manage and lease the real estate assets of Interstate pursuant to a management agreement for which we receive an annual fee equal to 4% of annual base rent and percentage rent. The management agreement has a term of 1 year and is automatically renewable unless terminated by either of the parties on 60 days’ notice at the end of the term. We believe, based upon comparable fees charged by other real estate companies, that the management agreement terms are fair to us. We earned $501,000, $521,000, and $541,000 of management fees under the agreement for the years ended December 31, 2017, 2016 and 2015, respectively.