Variable Interest Entities Narrative Tagging (Details)	9 Months Ended
	Sep. 30, 2015 owners properties
Available-for-Sale Securities, Ownership Percentage	100.00%
Number of Variable Interest Entities	13
Total Owners [Member]
Number of Owners | owners	3
Related party owner [Member]
Number of Owners | owners	1
Consolidated VIEs [Member]
Number of Variable Interest Entities	2
Unconsolidated Properties [Member]
Number of Variable Interest Entities	11