VARIABLE INTEREST ENTITIES - Schedule of the Fair Value of OBX Trusts Closed (Details) - OBX Trust - Consolidated VIEs - USD ($) $ in Thousands	Mar. 31, 2022	Feb. 28, 2022	Jan. 31, 2022	Nov. 30, 2021	Oct. 31, 2021	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
Variable Interest Entity [Line Items]
Loans	$ 315,843	$ 439,421	$ 556,696	$ 542,836		$ 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
OBX 2021-J3
Variable Interest Entity [Line Items]
Loans					$ 453,650
OBX 2021-INV2
Variable Interest Entity [Line Items]
Loans					$ 343,571
OBX 2021-INV3
Variable Interest Entity [Line Items]
Loans				$ 470,576
OBX 2022-INV1
Variable Interest Entity [Line Items]
Loans			$ 377,275
OBX 2022-INV2
Variable Interest Entity [Line Items]
Loans		$ 466,686
OBX 2022-INV3
Variable Interest Entity [Line Items]
Loans	$ 330,823