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FAIR VALUE MEASUREMENTS - Information about Significant Unobservable Inputs Used for Recurring Fair Value Measurements for Level 3 MSRs (Detail) - Fair Value, Measurements, Recurring - Level 3	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Discount rate | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.063	0.074
Discount rate | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.123	0.124
Discount rate | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.081	0.084
Prepayment rate | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.044	0.047
Prepayment rate | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.202	0.172
Prepayment rate | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.054	0.056
Delinquency rate | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.002	0.002
Delinquency rate | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.035	0.041
Delinquency rate | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.010	0.013
Cost to service | Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	82	83
Cost to service | Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	96	99
Cost to service | Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	86	87

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