Note Receivable (Details) (USD $)	4 Months Ended	12 Months Ended	19 Months Ended
	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2011	May 24, 2010
Note Receivable (Textuals) [Abstract]
Mortgage Loan Receivable Interest Rate Margin Above Libor (as a percent)		6.92%	6.92%
Number of rooms in senior loan secured facility (in rooms)		443	443	443
Allerton Loans [Member]
Note Receivable (Textuals) [Abstract]
Principal amount of secured senior mortgage loan acquired				$ 69,000,000
Amount paid on acquisition of senior mortgage loan	60,600,000
Blended interest rate on senior mortgage loan (as a percent)		LIBOR plus 692
Percentage points of default blended interest rate basis points (as a percent)		5.00%
Mortgage Loans on Real Estate, Principal Amount of Delinquent Loans		69,000,000	69,000,000
Loans Receivable Non Performing Non Accrual of Interest		3,600,000	3,600,000
Other asset impairment charges		0
Proceeds from Interest Received		$ 3,200,000	$ 5,800,000