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INVESTMENT SECURITIES - Credit Valuation Allowance for Available-for-Sale Debt Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	$ 17,356	$ 5,339	$ 7,604	$ 3,952
Credit losses on securities for which credit losses were not previously recorded	856	24	6,759	659
Credit losses on previously impaired securities	7,839	12	10,158	613
Decrease in allowance for credit losses on previously impaired securities	(1,914)	(736)	(821)	(585)
Reduction due to sales and intent to sell	(73)	0	(1,541)	0
Allowance for credit losses on PCD debt securities			1,905	0
Debt securities, allowance for credit loss, ending balance	24,064	4,639	24,064	4,639
Asset-backed securities
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	584	367	362	483
Credit losses on securities for which credit losses were not previously recorded	5	24	(92)	24
Credit losses on previously impaired securities	14	0	15	0
Decrease in allowance for credit losses on previously impaired securities	(407)	(84)	(89)	(200)
Reduction due to sales and intent to sell	0	0	0	0
Allowance for credit losses on PCD debt securities			0	0
Debt securities, allowance for credit loss, ending balance	196	307	196	307
Corporate notes
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	16,772	4,972	7,135	3,469
Credit losses on securities for which credit losses were not previously recorded	851	0	6,851	635
Credit losses on previously impaired securities	7,825	12	10,143	613
Decrease in allowance for credit losses on previously impaired securities	(1,507)	(652)	(732)	(385)
Reduction due to sales and intent to sell	(73)	0	(1,434)	0
Allowance for credit losses on PCD debt securities			1,905	0
Debt securities, allowance for credit loss, ending balance	23,868	$ 4,332	23,868	$ 4,332
Private label CMOs
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward]
Debt securities, allowance for credit loss, beginning balance	0		107
Credit losses on securities for which credit losses were not previously recorded	0		0
Credit losses on previously impaired securities	0		0
Decrease in allowance for credit losses on previously impaired securities	0		0
Reduction due to sales and intent to sell	0		(107)
Allowance for credit losses on PCD debt securities			0
Debt securities, allowance for credit loss, ending balance	$ 0		$ 0

X

- Definition

Debt Securities, Available-For-Sale, Excluding Accrued Interest, Allowance For Credit Loss, Decrease On Previously Impaired Securities

+ References

No definition available.

+ Details

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X

- Definition

Amount of increase in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and beneficial interest, purchased with credit deterioration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-9

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount excluding accrued interest, of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479130/326-30-45-1

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- Definition

Amount, excluding accrued interest, of credit loss expense on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) with no credit loss previously recorded.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

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Amount, excluding accrued interest, of credit loss expense (reversal of expense) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) with previously recorded allowance and not intended to be sold and not more likely than not will be required to sell before recovery of amortized cost basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-9

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147476148/220-40-50-22

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- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from sale.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479106/326-30-50-9

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