Dispositions, Assets Held for Sale and Discontinued Operations (Details) - USD ($) $ in Thousands	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016
Real property dispositions:
Total dispositions	$ 896,281	$ 128,768
Gain Loss On Sale Of Properties	286,247	1,530
Net other assets/liabilities disposed	21,254	0
Proceeds from sales of real property	1,203,782	130,298
Triple Net [Member]
Real property dispositions:
Total dispositions	882,436	128,768
Senior housing - operating [Member]
Real property dispositions:
Total dispositions	$ 13,845	$ 0

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration