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LOANS HELD FOR SALE - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025 USD ($) entity	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) entity	Sep. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
PCD debt securities acquired:
Loans held for sale (including nonperforming loans)	$ 5,000		$ 5,000		$ 2,800
Investment securities held to maturity	$ 801,324		$ 801,324		$ 991,937
Variable Interest Entity, Not Primary Beneficiary
PCD debt securities acquired:
Investment securities held to maturity		$ 160,000		$ 160,000
Proceeds from sale of finance receivables		40,200		40,200
Consumer Loan, Held-For-Sale | Personal And Other Installment Loans
PCD debt securities acquired:
Receivables sold		202,500		202,500
Consumer Loan, Held-For-Sale | Other Installment Loans
PCD debt securities acquired:
Financing receivable, sale		$ 53,000		$ 53,000
Number of VIEs | entity	2		2

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 40
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481628/310-20-40-7

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Section 45
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-Publisher FASB
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Amount excluding accrued interest, before allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity).

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Amount of decrease in financing receivable from sale. Excludes net investment in lease.

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-Topic 230
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