Property Dispositions, Discontinued Operations and Real Estate Impairment - Schedule of Disposal Groups (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Disposal Group, Including Discontinued Operation, Assets [Abstract]
Real estate, at cost	$ 37,319
Real estate, intangible assets	4,803
Accumulated depreciation and amortization	(8,758)
Assets held for sale	33,364	$ 3,379
Liabilities:
Deferred revenue - below market lease, net	20,769
Other	32
Liabilities held for sale	$ 20,801	$ 2,843