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VARIABLE INTEREST ENTITIES - Schedule of the Fair Value of OBX Trusts Closed (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Aug. 31, 2021	Jul. 31, 2021	Jun. 30, 2021	Apr. 30, 2021	Mar. 31, 2021	Sep. 30, 2020	Jul. 31, 2020	Feb. 29, 2020	Jan. 31, 2020	Oct. 31, 2019	Jul. 31, 2019	Jun. 30, 2019	Apr. 30, 2019	Jan. 31, 2019	Oct. 31, 2018	Aug. 31, 2018	Mar. 31, 2018
OBX Trust | Consolidated VIEs
Variable Interest Entity [Line Items]
Loans	$ 320,199	$ 356,474	$ 382,483	$ 376,004	$ 353,840	$ 257,135	$ 514,609	$ 489,352	$ 467,511	$ 374,609	$ 465,492	$ 463,405	$ 383,760	$ 388,156	$ 393,961	$ 384,027	$ 383,451	$ 327,162

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- Definition

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.

+ References

Reference 1: 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 G))
-URI http://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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