Real Property Acquisitions and Development (Details 2) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Development projects:
Total development projects	$ 107,761	$ 333,320
Expansion Projects	0	2,798
Total construction in progress conversions	107,761	336,118
Triple Net
Development projects:
Total development projects	59,188	266,650
Seniors housing operating [Member]
Development projects:
Total development projects	37,215	3,634
Outpatient Medical
Development projects:
Total development projects	$ 11,358	$ 63,036