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Discontinued Operations and Assets Held for Sale (Aggregate Balance Sheet of Properties Held for Sale Included in Discontinued Operations) (Details) (In-service Properties Reclassified to Discontinued Operations Held-for-sale [Member], USD $)
In Thousands
Sep. 30, 2011
In-service Properties Reclassified to Discontinued Operations Held-for-sale [Member]
 
Discontinued Operations 
Real estate investment, net$ 18,466
Other assets3,526
Total assets held-for-sale21,992
Accrued expenses666
Other liabilities291
Total liabilities held-for-sale$ 957