Related Party Transactions	12 Months Ended
Dec. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions The Company has an indemnity obligation to Vornado Realty Trust ("VNO"), one of its significant shareholders, with respect to actions by the Company that affect Vornado Realty Trust's status as a REIT. All related party transactions are approved by the independent members of the Company's Board of Trustees or the Audit Committee as provided for in the Company's Code of Business Conduct and Ethics. The Company leased a property to an entity in which VNO, a significant shareholder, has an interest. During 2017 and 2016, the Company recognized $234 and $236, respectively, in rental revenue from this property. This property was sold in 2017. The Company leases its corporate office from an affiliate of Vornado Realty Trust. Rent expense for this property was $1,192, $1,179 and $1,176 in 2018, 2017 and 2016, respectively. In connection with efforts, on a non-binding basis, to procure non-recourse mezzanine financing from an affiliate of the Company's Chairman, pursuant to the terms of the EB-5 visa program administered by the United States Citizenship and Immigration Services (“USCIS”), for a joint venture investment in Houston, Texas, in which the Company has an investment, the Company executed a guaranty in favor of an affiliate of its Chairman. The guaranty provided that the Company will reimburse investors providing the funds for such financing if the following occurs: (1) the joint venture receives such funds, (2) the USCIS denies the financing solely because the project is not permitted under the EB-5 visa program, and (3) the joint venture fails to return such funds. During 2017, USCIS approved the project, and the guaranty terminated by its terms. In 2018, the joint venture obtained $8,500 of EB-5 mezzanine financing from an affiliate of the Company's Chairman. The joint venture reimbursed the Chairman's affiliate $150 for its expenses. Under an indemnity agreement, the joint venture is required to pay an affiliate of the Company's Chairman 0.625% of the outstanding principal amount of the EB-5 mezzanine financing per annum. In addition, during 2017, the Company obtained non-recourse mezzanine financing in the initial amount of $8,000 from an affiliate of the Company's Chairman, pursuant to the terms of the EB-5 visa program administered by the USCIS, for an investment in Charlotte, North Carolina. In January 2018, the Company obtained an additional $500 of financing proceeds. The Company reimbursed the Chairman's affiliate approximately $105 for its expenses and paid a $128 structuring fee to the Chairman's affiliate. The property was subsequently contributed to, and the financing assumed by, NNN JV.

Related Party Transactions

The Company has an indemnity obligation to Vornado Realty Trust ("VNO"), one of its significant shareholders, with respect to actions by the Company that affect Vornado Realty Trust's status as a REIT.

All related party transactions are approved by the independent members of the Company's Board of Trustees or the Audit Committee as provided for in the Company's Code of Business Conduct and Ethics.

The Company leased a property to an entity in which VNO, a significant shareholder, has an interest. During 2017 and 2016, the Company recognized $234 and $236, respectively, in rental revenue from this property. This property was sold in 2017. The Company leases its corporate office from an affiliate of Vornado Realty Trust. Rent expense for this property was $1,192, $1,179 and $1,176 in 2018, 2017 and 2016, respectively.

In connection with efforts, on a non-binding basis, to procure non-recourse mezzanine financing from an affiliate of the Company's Chairman, pursuant to the terms of the EB-5 visa program administered by the United States Citizenship and Immigration Services (“USCIS”), for a joint venture investment in Houston, Texas, in which the Company has an investment, the Company executed a guaranty in favor of an affiliate of its Chairman. The guaranty provided that the Company will reimburse investors providing the funds for such financing if the following occurs: (1) the joint venture receives such funds, (2) the USCIS denies the financing solely because the project is not permitted under the EB-5 visa program, and (3) the joint venture fails to return such funds. During 2017, USCIS approved the project, and the guaranty terminated by its terms. In 2018, the joint venture obtained $8,500 of EB-5 mezzanine financing from an affiliate of the Company's Chairman. The joint venture reimbursed the Chairman's affiliate $150 for its expenses. Under an indemnity agreement, the joint venture is required to pay an affiliate of the Company's Chairman 0.625% of the outstanding principal amount of the EB-5 mezzanine financing per annum.

In addition, during 2017, the Company obtained non-recourse mezzanine financing in the initial amount of $8,000 from an affiliate of the Company's Chairman, pursuant to the terms of the EB-5 visa program administered by the USCIS, for an investment in Charlotte, North Carolina. In January 2018, the Company obtained an additional $500 of financing proceeds. The Company reimbursed the Chairman's affiliate approximately $105 for its expenses and paid a $128 structuring fee to the Chairman's affiliate. The property was subsequently contributed to, and the financing assumed by, NNN JV.