Real Estate and Other Assets Held For Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets, held for sale [Abstract]
Land	$ 1,450	$ 0
Buildings and tenant improvements	11,576	0
Land held for development	2,184	995
Less - accumulated depreciation	(5,062)	0
Net real estate assets	10,148	995
Accrued straight-line rents receivable, net	335	0
Deferred leasing costs, net	128	0
Prepaid expenses and other assets	20	43
Real estate and other assets, net, held for sale	$ 10,631	$ 1,038