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Favorable Lease Assets - Schedule of Finite-Lived Intangible Assets by Major Class (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Carrying amount of the lease | $ 46,216 | $ 26,690
Above Market Leases Ground | Westin Boston Waterfront Hotel Ground Lease |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Carrying amount of the lease | 17,480 | 17,643
Above Market Leases Ground | Hotel Palomar Phoenix Ground Lease |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Carrying amount of the lease | 19,838 | 0
Above Market Leases Ground | Orchards Inn Sedona Annex Sublease |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Carrying amount of the lease | 8,799 | 8,925
Above Market Leases Ground | Lexington Hotel New York Tenant Leases |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |
Carrying amount of the lease | $ 99 | $ 122

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