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Favorable Lease Assets (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Indefinite-lived Intangible Assets by Major Class [Line Items]
Favorable lease assets, net	$ 40,972,000	$ 43,285,000
Favorable Lease Assets (Textuals) [Abstract]
Finite-lived intangible assets, amortization expense	1,000,000	900,000	800,000
Impairment of intangible assets, finite-lived		0
Boston Westin Waterfront Ground Lease [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease right	18,726,000	18,941,000
Boston Westin Waterfront - Lease Right [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease right	9,045,000	9,513,000
Favorable Lease Assets (Textuals) [Abstract]
Impairment of favorable lease asset	500,000
Boston Westin Waterfront - Lease Right [Member] | Minimum [Member]
Favorable Lease Assets (Textuals) [Abstract]
Number of room hotels for development for which favorable lease assets are owned (in rooms)	320
Boston Westin Waterfront - Lease Right [Member] | Maximum [Member]
Favorable Lease Assets (Textuals) [Abstract]
Number of room hotels for development for which favorable lease assets are owned (in rooms)	350
Minneapolis Hilton Ground Lease [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease right	5,910,000	5,985,000
Oak Brook Hills Marriot Resort Ground Lease [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease right	5,489,000	7,352,000
Favorable Lease Assets (Textuals) [Abstract]
Impairment of favorable lease asset	1,400,000
Finite-LivedIntangible Assets After Impairment Date, Net	5,600,000
Radisson Lexington Restaurant Leases [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease right	1,323,000	1,494,000
Hilton Boston Downtown Tenant Leases [Member]
Indefinite-lived Intangible Assets by Major Class [Line Items]
Carrying amount of the lease right	$ 479,000	$ 0

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Number of Room Hotel For Development For Which Favorable Lease Assets Are Owned

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

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Carrying amount of assets (excluding financial assets) that lack physical substance, excluding goodwill, having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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