Real Property Acquisitions and Development (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Development projects:
Development projects	$ 141,305	$ 198,859	$ 260,544
Expansion projects	38,808	24,804	26,395
Total construction in progress conversions	180,113	223,663	286,939
Triple Net [Member]
Development projects:
Development projects	104,844	71,569	133,181
Senior Housing Operating [Member]
Development projects:
Development projects	19,869	0	0
Outpatient Medical [Member]
Development projects:
Development projects	$ 16,592	$ 127,290	$ 127,363