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LOAN REPURCHASE RESERVE - Summary of Activities in Reserve for Loss Reimbursements on Sold Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Loss Contingency Accrual [Roll Forward]
Balance at beginning of year	$ 4,348
Balance at end of year	2,989	$ 4,348
Representations and Warranties Obligations and Corporate Guarantees
Loss Contingency Accrual [Roll Forward]
Balance at beginning of year	4,348	5,515	$ 6,201
Subsequent change in the reserve	(1,004)	(948)	(686)
Utilization of reserve for loan repurchases	(355)	(219)	0
Balance at end of year	$ 2,989	$ 4,348	$ 5,515