Property Acquisitions (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Jul. 31, 2012 Grove At Moscow Valdosta [Member]	Dec. 31, 2011 Grove At Huntsville Statesboro [Member]
Land		$ 3,401	$ 4,008
In-place leases		388	913
Buildings and improvements		49,911	43,446
Furniture and fixtures	0	1,708	1,633
Other		974	410
Debt repaid at time of purchase		(27,299)	(28,764)
Business Acquisition, Purchase Price Allocation, Assets Acquired		29,083	21,646
Less estimated fair value of interest owned prior to acquisition		(12,320)	(8,042)
Business Acquisition, Cost of Acquired Entity, Purchase Price		$ 16,763	$ 13,604