Segment Reporting (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting [Abstract]
Rental income from real estate assets sold or held for sale	$ 2,016	$ 7,292	$ 5,365	$ 14,726
Operating expenses from real estate assets sold or held for sale	(824)	(2,915)	(2,147)	(5,914)
Income (Loss) From Assets Held for Sale, Not Classified as Discontinued Operations	$ 1,192	$ 4,377	$ 3,218	$ 8,812