Segment Reporting (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting [Abstract]
Rental income from real estate assets sold or held for sale, not classified as discontinued operations	$ 1,353	$ 6,904	$ 6,162	$ 27,499
Operating expenses from real estate assets sold or held for sale, not classified as discontinued operations	(510)	(2,760)	(2,528)	(10,833)
Income (Loss) From Assets Held for Sale, Not Classified as Discontinued Operations	$ 843	$ 4,144	$ 3,634	$ 16,666