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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of Risk (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Loan Originations Benchmark | Geographic Concentration Risk | California
Concentration of Risk [Line Items]
Concentration risk, percentage	18.00%	22.00%
Mortgage Loans Benchmark | Investor Concentration Risk | Investor 1
Concentration of Risk [Line Items]
Concentration risk, percentage	36.00%	28.00%
Mortgage Loans Benchmark | Investor Concentration Risk | Investor 2
Concentration of Risk [Line Items]
Concentration risk, percentage	28.00%	27.00%
Mortgage Loans Benchmark | Investor Concentration Risk | Investor 3
Concentration of Risk [Line Items]
Concentration risk, percentage	12.00%	22.00%
Warehouse Lines of Credit Benchmark | Lender Concentration Risk | Lender 1
Concentration of Risk [Line Items]
Concentration risk, percentage	20.00%
Warehouse Lines of Credit Benchmark | Lender Concentration Risk | Lender 2
Concentration of Risk [Line Items]
Concentration risk, percentage	18.00%

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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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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