FAIR VALUE MEASUREMENTS - Information about Significant Unobservable Inputs Used for Recurring Fair Value Measurements for Level 3 MSRs (Detail) - Level 3 - MSR	Jun. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)
Discount rate \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.056	0.047
Discount rate \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.112	0.120
Discount rate \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.078	0.079
Prepayment rate \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.047	0.046
Prepayment rate \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.187	0.228
Prepayment rate \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.059	0.058
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	0.047	0.037
Delinquency rate \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	0.012	0.011
Cost to service \| Minimum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	68	68
Cost to service \| Maximum
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	92	93
Cost to service \| Weighted Average
Fair Value, Option, Quantitative Disclosures [Line Items]
MSR measurement inputs	80	82