Real Estate Leases and Mortgage Notes Receivable (Details 1) (USD $) In Thousands, unless otherwise specified												12 Months Ended		12 Months Ended		12 Months Ended		12 Months Ended			12 Months Ended		12 Months Ended		12 Months Ended			12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009	Dec. 31, 2012 Construction Notes [Member]	Dec. 31, 2011 Construction Notes [Member]	Dec. 31, 2012 Other mortgage notes [Member]	Dec. 31, 2011 Other mortgage notes [Member]	Dec. 31, 2012 Inpatient [Member] Missouri [Member] Construction Notes [Member]	Dec. 31, 2011 Inpatient [Member] Missouri [Member] Construction Notes [Member]	Dec. 31, 2012 Medical Office Building [Member] Oklahoma [Member] Construction Notes [Member]	Dec. 31, 2011 Medical Office Building [Member] Oklahoma [Member] Construction Notes [Member]	Dec. 31, 2012 Medical Office Building [Member] Texas [Member] Construction Notes [Member]	Dec. 31, 2011 Medical Office Building [Member] Texas [Member] Construction Notes [Member]	Dec. 31, 2012 Medical Office Building [Member] Iowa [Member] Construction Notes [Member]		Dec. 31, 2011 Medical Office Building [Member] Iowa [Member] Construction Notes [Member]	Dec. 31, 2012 Medical Office Building [Member] Iowa [Member] Other mortgage notes [Member]	Dec. 31, 2011 Medical Office Building [Member] Iowa [Member] Other mortgage notes [Member]	Dec. 31, 2012 Medical Office Building [Member] Florida [Member] Other mortgage notes [Member]	Dec. 31, 2011 Medical Office Building [Member] Florida [Member] Other mortgage notes [Member]	Dec. 31, 2012 Medical Office Building [Member] Florida One [Member] Other mortgage notes [Member]		Dec. 31, 2011 Medical Office Building [Member] Florida One [Member] Other mortgage notes [Member]	Dec. 31, 2012 Other Property [Member] Iowa [Member] Other mortgage notes [Member]	Dec. 31, 2011 Other Property [Member] Iowa [Member] Other mortgage notes [Member]
Mortgage Loans on Real Estate [Line Items]
Face Amount												$ 111,400		$ 91,179		$ 12,444		$ 2,136	[1]		$ 3,700		$ 3,750		$ 2,700	[1]		$ 40,000
Interest Rate												6.75%		6.75%		8.10%		11.00%			8.00%		7.50%		7.00%			7.70%
Mortgage notes receivable	$ 162,191	[2],[3]	$ 97,381	[2],[3]	$ 36,599	[2]	$ 31,008	$ 118,441	$ 51,471	$ 43,750	$ 45,910	$ 61,599	$ 20,559	$ 56,842	$ 19,896	$ 0	$ 9,547	$ 0		$ 1,469	$ 0	$ 3,230	$ 3,750	$ 0	$ 0		$ 2,680	$ 40,000	$ 40,000

[1] MOB - Medical office building.

[2] Total mortgage notes as of December 31, 2012 had an aggregate total cost of $162.2 million for federal income tax purposes.

[3] Level 2 - Fair value based on quoted prices for similar instruments in active markets; quoted prices for identical or similar instruments in markets that are not active; and model-driven valuations in which significant inputs and significant value drivers are observable in active markets.