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Favorable Lease Assets (Details) | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2015 USD ($) room | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Accumulated amortization |  |  | $ 2,600,000 | $ 3,000,000 |
Favorable lease assets, net |  |  | 23,955,000 | 34,274,000 |
Amortization of intangible assets |  |  | 500,000 | 700,000 | $ 1,000,000
Amortization in 2016 |  |  | 300,000 |  |
Amortization in 2017 |  |  | 0.3 |  |
Amortization in 2018 |  |  | 0.3 |  |
Amortization in 2019 |  |  | 0.3 |  |
Amortization in 2020 |  |  | 0.3 |  |
Write off of assets |  |  | 10,461,000 | 0 | $ 0
Above Market Leases Ground | Boston Westin Waterfront Ground Lease |  |  |  |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Carrying amount of the lease |  |  | 18,076,000 | 18,293,000 |
Above Market Leases Ground | Minneapolis Hilton Ground Lease |  |  |  |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Carrying amount of the lease |  |  | 5,685,000 | 5,760,000 |
Above Market Leases Ground | Lexington Hotel New York |  |  |  |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Carrying amount of the lease |  |  | 186,000 | 1,031,000 |
Above Market Leases Ground | Hilton Boston Downtown |  |  |  |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Carrying amount of the lease |  |  | 8,000 | 145,000 |
Above Market Lease Rights | Boston Westin Waterfront Ground Lease |  |  |  |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Nonamortizable intangible asset |  |  | $ 0 | $ 9,045,000 |
Impairment of favorable lease asset | $ 9,600,000 |  |  |  |
Above Market Lease Rights | Lexington Hotel New York |  |  |  |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Impairment of favorable lease asset |  | $ 800,000 |  |  |
Prepaid Expenses and Other Current Assets | Above Market Lease Rights | Boston Westin Waterfront Ground Lease |  |  |  |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Write off of assets | $ 600,000 |  |  |  |
Minimum | Above Market Lease Rights | Boston Westin Waterfront Ground Lease |  |  |  |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Number of room hotel for development for which favorable lease assets are owned | room |  |  | 320 |  |
Maximum | Above Market Lease Rights | Boston Westin Waterfront Ground Lease |  |  |  |  |
Indefinite-lived Intangible Assets by Major Class [Line Items] |  |  |  |  |
Number of room hotel for development for which favorable lease assets are owned | room |  |  | 350 |  |

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