Quarterly report pursuant to Section 13 or 15(d)

Real Estate Transactions (Schedule Of Purchase Price Allocation) (Details)

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Real Estate Transactions (Schedule Of Purchase Price Allocation) (Details) (Alterra At Overlook Ridge IA [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2013
Jan. 18, 2013
Alterra At Overlook Ridge IA [Member]
   
Business Acquisition [Line Items]    
Land   $ 9,042
Buildings and improvements   50,739
Furniture, fixtures and equipment   801
In-place lease values   931 [1]
Total assets acquired   61,513
Less: Below market lease values   195 [1]
Total liabilities assumed   195
Net cash paid at acquisition   $ 61,318
In-place and below market lease value amortization period 7 months  
[1] In-place lease values and below market lease values will be amortized over seven months.