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LOAN REPURCHASE RESERVE - Summary of Activities in Reserve for Loss Reimbursements on Sold Loans (Details) - Representations and Warranties Obligations and Corporate Guarantees - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Loss Contingency Accrual [Roll Forward]
Balance at beginning of year	$ 6,201	$ 2,506	$ 6,306
Initial provision for loan repurchases (1)	11	4,563	126
Subsequent change in the reserve	(697)	(660)	(2,488)
Utilization of reserve for loan repurchases	0	(208)	(1,438)
Balance at end of year	$ 5,515	$ 6,201	$ 2,506

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- Definition

Loss Contingency Accrual, Subsequent Change in the Reserve

+ References

No definition available.

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- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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- Definition

Amount of cash outflow reducing loss contingency liability.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
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- Definition

Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

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-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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