Real Property Acquisitions and Development (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Development projects:
Development projects	$ 260,544,000	$ 336,048,000	$ 470,096,000
Expansion projects	26,395,000	4,983,000	45,414,000
Total construction in progress conversions	286,939,000	341,031,000	515,510,000
Senior Housing Facilities Triple Net [Member]
Development projects:
Development projects	133,181,000	146,913,000	114,161,000
Medical Facilities [Member]
Development projects:
Development projects	$ 127,363,000	$ 189,135,000	$ 355,935,000