Dispositions of Real Estate and Discontinued Operations (Details) (USD $)	3 Months Ended		9 Months Ended					9 Months Ended	1 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended
	Sep. 30, 2013 item	Sep. 30, 2012 item	Sep. 30, 2013 item	Sep. 30, 2012 item	Dec. 31, 2012	Sep. 30, 2013 Operating segment	Dec. 31, 2012 Operating segment	Sep. 30, 2012 Operating segment Medical office	Sep. 30, 2013 Operating segment Hospital item	Sep. 30, 2013 Operating segment Hospital item	Dec. 31, 2012 Operating segment Hospital item	Sep. 30, 2013 Operating segment Senior housing
Dispositions of Real Estate and Land
Total consideration for disposition of real estate								$ 7,000,000				$ 4,000,000
Number of beds sold									62
Number of beds acquired									60
Number of properties held for sale										4	5
Carrying value of properties classified as held for sale	130,765,000		130,765,000		145,621,000	130,765,000	145,621,000		131,000,000	131,000,000	146,000,000
Gain on sales of real estate, net of income taxes	8,298,000		9,185,000	2,856,000					8,000,000
Operating income from discontinued operations
Rental and related revenues	6,460,000	10,260,000	20,458,000	31,023,000
Depreciation and amortization expenses	1,433,000	2,969,000	4,346,000	11,876,000
Operating expenses	3,000	18,000	9,000	75,000
Other income (expense), net	(74,000)	593,000	229,000	2,452,000
Income before gain on sales of real estate	$ 5,098,000	$ 6,680,000	$ 15,874,000	$ 16,620,000
Number of properties included in discontinued operations	5	9	6	10