SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Mortgage Servicing Rights (Details) - OMSRs	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Minimum
Mortgage Banking Activities
Discount rate used for estimated capitalized MSRs (as a percent)	8.00%	8.00%	8.00%
Maximum
Mortgage Banking Activities
Discount rate used for estimated capitalized MSRs (as a percent)	14.00%	14.00%	14.00%

Discount rate which is used to value residual cash flows generated by financial assets of the securitization, asset-backed financing arrangement, or similar transfer for initial fair value measurement.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481326/860-20-50-3

Name:	us-gaap_AssumptionForFairValueOnSecuritizationDateOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesDiscountRate
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration