Dispositions and Impairment - Schedule of Properties Held for Sale (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Liabilities:
Liabilities held for sale	$ 6	$ 790
Disposal Group, Held-for-sale, Not Discontinued Operations
Assets:
Real estate, at cost	27,459	32,629
Real estate, intangible assets	7,933	7,941
Accumulated depreciation and amortization	(17,023)	(24,312)
Rent receivable - deferred	0	79
Other	14	193
Assets held for sale	18,383	16,530
Liabilities:
Other	6	790
Liabilities held for sale	$ 6	$ 790

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