Related Party Transactions	9 Months Ended
Related Party Transactions	Sep. 30, 2018
Related Party Transaction [Line Items]
Related Party Transactions	Related Party Transactions In connection with efforts 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 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 would reimburse investors providing the funds for such financing if the following occurred: (1) the joint venture received such funds, (2) the USCIS denied the financing solely because the project was not permitted under the EB-5 visa program, and (3) the joint venture failed to return such funds. During 2017, USCIS approved the project, and the guaranty terminated by its terms. The joint venture is still pursuing the mezzanine financing. 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. See note 6. There were no other related party transactions other than those disclosed elsewhere in this Quarterly Report and the audited consolidated financial statements in the Annual Report.
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 Quarterly Report and the audited consolidated financial statements in the Annual Report. The Partnership had outstanding net advances owed to Lexington of $4,494 and $2,422 as of September 30, 2018 and December 31, 2017, respectively. The advances are payable on demand. Lexington earned distributions of $43,026 and $46,732 during the nine months ended September 30, 2018 and 2017, respectively. In September 2017, the Partnership redeemed 2,675,785 OP units owned by Lexington that were entitled to aggregate annual distributions of $3.25 per unit for $129,990. The Partnership was allocated interest expense by Lexington, in accordance with the partnership agreement, relating to certain lending facilities of $7,168 and $5,913 for the nine months ended September 30, 2018 and 2017, 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 $4,993 and $4,911 for the nine months ended September 30, 2018 and 2017, respectively. A Lexington affiliate provides property management services for certain Partnership properties. The Partnership recognized property operating expenses of $403 and $515 for the nine months ended September 30, 2018 and 2017, respectively, for aggregate fees charged by the affiliate. In addition, during 2017, the Partnership obtained non-recourse mezzanine financing in the initial amount of $8,000 from an affiliate of Lexington's Chairman, who is also the holder of the most OP units other than Lexington, 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 Partnership obtained an additional $500 of financing proceeds. The Partnership reimbursed the Chairman's affiliate approximately $105 for its expenses and paid the Chairman's affiliate a $128 structuring fee. The property was subsequently contributed to, and the financing assumed by, NNN JV. See note 3.