INVESTMENTS IN DEBT SECURITIES (Bonds and Related Unrealized Gains and Losses) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Schedule of Available-for-sale Securities [Line Items]
Fair Value	$ 29,988	$ 31,365
Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Unpaid principal balance of bond investments	30,715	30,885
Amortized Cost	20,716	20,797
Gross Unrealized Gains	9,272	10,568
Fair Value	$ 29,988	$ 31,365
FV as a % of UPB	98.00%	102.00%
Multifamily Tax-Exempt Bond [Member]
Schedule of Available-for-sale Securities [Line Items]
Unpaid principal balance of bond investments	$ 4,000	$ 4,000
Amortized Cost	0	0
Gross Unrealized Gains	6,114	6,026
Fair Value	$ 6,114	$ 6,026
FV as a % of UPB	153.00%	151.00%
Infrastructure Bond [Member]
Schedule of Available-for-sale Securities [Line Items]
Unpaid principal balance of bond investments	$ 26,715	$ 26,885
Amortized Cost	20,716	20,797
Gross Unrealized Gains	3,158	4,542
Fair Value	$ 23,874	$ 25,339
FV as a % of UPB	89.00%	94.00%

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Unpaid principal balance of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

No definition available.

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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-Publisher FASB
-Name Accounting Standards Codification
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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454

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