Related Party Transactions	12 Months Ended
Related Party Transactions	Dec. 31, 2016
Related Party Transaction [Line Items]
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 acquisitions, sales and loans are approved by the independent members of the Company's Board of Trustees or the Audit Committee. The Company leases a property to an entity in which VNO, a significant shareholder, has an interest. During 2016, 2015 and 2014, the Company recognized $236, $255 and $255, respectively, in rental revenue from this property. The Company leases its corporate office from an affiliate of Vornado Realty Trust. Rent expense for this property was $1,176, $1,323 and $1,252 in 2016, 2015 and 2014, 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 provides 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. As of December 31, 2016, the joint venture has not received any such funds and the Company has not recorded any liability as it relates to this guaranty. The maximum amount of funds that would be subject to the guaranty obligation is $18,000. In addition, 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 USCIS, for an investment in Charlotte, North Carolina, the Company agreed to reimburse the Chairman's affiliate up to approximately $7 for its expenses.
LCIF [Member]
Related Party Transaction [Line Items]
Related Party Transactions	Related Party Transactions The Partnership had the following related party transactions in addition to related party transactions discussed elsewhere in this report. The Partnership had outstanding net advances owed from/(to) Lexington of $5,967 and $(3,232) as of December 31, 2016 and 2015, respectively. The advances are receivable/payable on demand. Lexington earned distributions of $64,319, $58,361 and $53,728 during 2016, 2015 and 2014, respectively. During 2015 and 2014, the Partnership issued 12,559,130 and 2,571,757 units, respectively, to Lexington to satisfy $112,286 and $27,981, respectively, of outstanding distributions and advances. The Partnership was allocated interest and amortization expense by Lexington, in accordance with the Partnership agreement, relating to certain of its lending facilities of $11,392, $12,253 and $10,282 for the years ended December 31, 2016, 2015 and 2014, respectively. Lexington, on behalf of the General Partner, pays for certain general administrative and other costs on behalf of the Partnership from time to time. These costs are reimbursable by the Partnership. These costs were approximately $9,767, $8,618 and $7,335 for 2016, 2015 and 2014, respectively. A Lexington affiliate provides property management services for certain Partnership properties. The Partnership recognized property operating expenses, including from discontinued operations, of $764, $905 and $1,004 for the years ended December 31, 2016, 2015 and 2014, respectively, for aggregate fees and reimbursements charged by the affiliate. The Partnership leases a property to an entity in which Vornado Realty Trust, a significant Lexington shareholder, has an interest. During 2016, 2015 and 2014, the Partnership recognized $236, $255 and $255, respectively, in rental revenue from this property. In connection with efforts, on a non-binding basis, to procure non-recourse mezzanine financing from an affiliate of Lexington's Chairman, pursuant to the terms of the EB-5 visa program administered by the United States Citizenship and Immigration Services, for an investment in Charlotte, North Carolina, the Partnership agreed to reimburse the Chairman's affiliate up to approximately $7 for its expenses.