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SCHEDULE IV Mortgage Loans Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Prior liens	$ 54,063
Face amount	11,173
Carrying value	$ 11,173	$ 13,126	$ 13,126	$ 13,126
Unified Housing Foundation, Inc. (Echo Station) [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Location	Echo Station
Interest Rate	12.00%
Maturity Date	Dec. 31, 2032
Periodic Payment Terms	Payments from excess property cash flows
Prior liens	$ 13,738
Face amount	1,481
Carrying value	$ 1,481
Unified Housing Foundation, Inc. (Lakeshore Villas) [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Location	Lakeshore Villas
Interest Rate	12.00%
Maturity Date	Dec. 31, 2032
Periodic Payment Terms	Payments from excess property cash flows
Prior liens	$ 26,645
Face amount	2,000
Carrying value	$ 2,000
Unified Housing Foundation, Inc. (Lakeshore Villas)
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Location	Lakeshore Villas
Interest Rate	12.00%
Maturity Date	Dec. 31, 2032
Periodic Payment Terms	Payments from excess property cash flows
Face amount	$ 6,369
Carrying value	$ 6,369
Unified Housing Foundation, Inc. (Timbers of Terrell) [Member]
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate [Line Items]
Location	Timbers of Terrell
Interest Rate	12.00%
Maturity Date	Dec. 31, 2032
Periodic Payment Terms	Payments from excess property cash flows
Prior liens	$ 13,680
Face amount	1,323
Carrying value	$ 1,323

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Maturity date of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, in YYYY-MM-DD format.

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-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 12
-Paragraph Column C
-Subsection 29

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Column C))
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Amount of contractual principal due at origination of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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Interest rate of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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-Publisher SEC
-Name Regulation S-X (SX)
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-Paragraph Column B
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Description of contractual payment terms of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. Includes, but is not limited to, whether mortgage loan is payable at level or varying amount to maturity, balloon payment requirement at maturity, and prepayment penalty.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher SEC
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Amount of prior lien on real estate securing mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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-Publisher SEC
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Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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