Real Property Acquisitions and Development (Details 2) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Development projects:
Total development projects	$ 350,142	$ 68,648
Expansion projects	10,336	2,879
Total construction in progress conversions	360,478	71,527
Triple Net [Member]
Development projects:
Total development projects	283,472	24,535
Seniors housing operating [Member]
Development projects:
Total development projects	3,634	0
Outpatient Medical [Member]
Development projects:
Total development projects	$ 63,036	$ 44,113