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Real Estate Assets, Net - Narrative (Details) $ in Thousands	3 Months Ended			6 Months Ended			12 Months Ended
	Jun. 30, 2021 USD ($) property		Jun. 30, 2020 USD ($) property	Jun. 30, 2021 USD ($) property		Jun. 30, 2020 USD ($) property	Dec. 31, 2020 USD ($) property		Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Real Estate [Line Items]
Net investments in real estate	$ 4,768	[1]	$ 8,233	$ 4,768	[1]	$ 8,233	$ 8,526	[1]	$ 7,098	$ 12,250	$ 15,071
Property held-for-sale	4,400			4,400			7,800
Rental properties	$ 400			400			700
Real estate held for sale improvements				$ 300			$ 300
Number of properties owned | property				25			38
Number of held-for-sale properties | property				20			32
Number of rental properties | property				5			6
Number of held-for-sale residential properties disposed | property	11		14	20		33
Gain (loss) on sale of property				$ 197		$ 591
Real estate impairment	$ 100		$ 100	200		1,000
Carrying Value
Real Estate [Line Items]
Net investments in real estate	4,800			4,800			$ 8,500
Property held-for-sale	4,409			4,409			$ 7,807
Other income
Real Estate [Line Items]
Gain (loss) on sale of property	$ 100		$ 400	$ 200		$ 800
[1] Real estate owned properties, net, includes valuation allowances of $0.5 million and $1.4 million at June 30, 2021 and December 31, 2020, respectively.

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Represents adjustment to real estate properties recorded to reflect properties at the lower of cost or estimated fair value.

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Represents improvements real estate held for sale.

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The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity.

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Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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Carrying amount of income producing properties held for rental.

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