Dispositions and Impairment - Schedule of Properties Held for Sale (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Liabilities:
Liabilities held for sale	$ 111,755	$ 386
Disposal Group, Held-for-sale, Not Discontinued Operations
Assets:
Real estate, at cost	204,289	63,639
Real estate, intangible assets	34,545	14,498
Accumulated depreciation and amortization	(61,977)	(16,873)
Rent receivable - deferred	2,788	2,439
Other	1,507	165
Assets held for sale	181,152	63,868
Liabilities:
Mortgage notes payable, net	109,527	0
Accounts payable and other liabilities	1,205	42
Prepaid rent	1,023	344
Liabilities held for sale	$ 111,755	$ 386