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Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2010 Y | Dec. 31, 2011 | Dec. 31, 2010
Consolidation |  |  |
Ownership interest in subsidiaries (as a percent) |  | 100.00% |
Real Estate Properties |  |  |
Losses on asset impairment charges | $ 163,681 | $ 16,384 | $ 163,681
Per share loss on asset impairment (in dollars per share) | 1.33 |  |
Hotels |  |  |
Real Estate Properties |  |  |
Losses on asset impairment charges |  | 11,418 |
Number of properties classified as held for sale |  | 21 |
Per share loss on asset impairment (in dollars per share) |  | 0.09 |
Hotels | Marriott Contracts Nos. 2, 3 and 4 |  |  |
Real Estate Properties |  |  |
Losses on asset impairment charges |  | 11,418 |
Per share loss on asset impairment (in dollars per share) |  | 0.09 |
Hotels | InterContinental contracts |  |  |
Real Estate Properties |  |  |
Losses on asset impairment charges |  | $ 4,966 |
Per share loss on asset impairment (in dollars per share) |  | 0.04 |
Buildings and improvements |  |  |
Real Estate Properties |  |  |
Estimated useful life (in years) |  | 40 |
Personal property |  |  |
Real Estate Properties |  |  |
Estimated useful life (in years) |  | 12 |

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