Real Property Acquisitions and Development (Details 3) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Development projects:
Development projects	$ 173,074	$ 141,305	$ 198,859
Expansion projects	11,363	38,808	24,804
Total construction in progress conversions	184,437	180,113	223,663
Triple Net [Member]
Development projects:
Development projects	46,094	104,844	71,569
Senior Housing Operating [Member]
Development projects:
Development projects	18,979	19,869	0
Outpatient Medical [Member]
Development projects:
Development projects	$ 108,001	$ 16,592	$ 127,290