Property Dispositions, Discontinued Operations and Real Estate Impairment - Schedule of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Assets:
Real estate, at cost	$ 6,011	$ 16,590
Real estate, intangible assets	5,589	10,786
Accumulated depreciation and amortization	(2,077)	(4,069)
Rent receivable - deferred	624	1,118
Assets held for sale	10,147	24,425
Liabilities:
Mortgage payable	0	8,373
Other	0	32
Liabilities held for sale	$ 0	$ 8,405