Business (Details)	Sep. 30, 2015 properties
Business [Line Items]
Number of properties in diversified portfolio	1,353	[1]
Controlling [Member]
Business [Line Items]
Number of properties in diversified portfolio	1,414

[1] (1)     Genesis Healthcare is in our triple-net segment. Sunrise Senior Living and Revera are in our seniors housing operating segment. Brookdale Senior Living and Benchmark Senior Living are in both our triple-net and seniors housing operating segments.