Property Dispositions and Real Estate Impairment - Schedule of Assets and Liabilities Held for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Assets:
Real estate, at cost	$ 5,941	$ 25,957
Real estate, intangible assets	0	7,789
Accumulated depreciation and amortization	0	(13,346)
Rent receivable - deferred	0	1,715
Other assets	43	1,693
Assets held for sale	5,984	23,808
Liabilities:
Other	324	191
Liabilities held for sale	$ 324	$ 191