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Commitments and Contingencies - Narrative (Details) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 28, 2017 room | Dec. 31, 2017 USD ($) ft² hotel renewal_term ground_lease | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Feb. 06, 2015 room
Real Estate Properties [Line Items] |  |  |  |  |
Number of properties subject to ground leases (in hotels) | hotel |  | 5 |  |  |
Ground rent expense | $ |  | $ 10.2 | $ 12.7 | $ 15.1 |
Cash paid for ground rent | $ |  | $ 4.1 | $ 7.0 | $ 9.4 |
Bethesda Marriott Suites |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) |  | 0 |  |  |
Courtyard Manhattan / Fifth Avenue |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) |  | 1 |  |  |
Ground leases renewal option (in years) |  | 49 years |  |  |
Salt Lake City Marriott Downtown |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of properties subject to ground leases (in hotels) | ground_lease |  | 2 |  |  |
Interest in land under hotel (as a percent of ownership) |  | 21.00% |  |  |
Boston Westin |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) |  | 0 |  |  |
Renaissance Worthington |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of properties subject to ground leases (in hotels) | ground_lease |  | 3 |  |  |
Number of renewal periods (in ones) |  | 3 |  |  |
Ground leases renewal option (in years) |  | 15 years |  |  |
Percentage of land on which the parking garage is constructed |  | 25.00% |  |  |
JW Marriott Denver at Cherry Creek |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) |  | 2 |  |  |
Ground leases renewal option (in years) |  | 5 years |  |  |
Area of real estate property | ft² |  | 5,500 |  |  |
Incremental renewal option (in years) |  | 1 year |  |  |
First Set of Renewal Options | Shorebreak Hotel |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) |  | 2 |  |  |
Ground leases renewal option (in years) |  | 25 years |  |  |
Second Set of Renewal Options | Shorebreak Hotel |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of renewal periods (in ones) |  | 1 |  |  |
Ground leases renewal option (in years) |  | 24 years |  |  |
Shorebreak Hotel |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of rooms acquired (in rooms) | room |  |  |  |  | 157
Orchards Inn Sedona |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of rooms | room | 28 |  |  |  |
Number of rooms acquired (in rooms) | room | 70 |  |  |  |
Long-Term Ground Lease | Shorebreak Hotel |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Ownership of undivided interest (as a percent of ownership) |  | 95.50% |  |  |
Land Underlying the Hotel and Lease | Shorebreak Hotel |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Interest in land under hotel (as a percent of ownership) |  | 4.50% |  |  |

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