DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2026	Dec. 31, 2025	Mar. 31, 2026
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 1,665,696	$ 1,203,920
Fair Value Asset (Liability)	2,119	2,122
Designated as hedging instrument \| Cash flow hedges
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	400,000	50,000
Fair Value Asset (Liability)	(1,452)	(336)
Designated as hedging instrument \| Cash flow hedges \| Collar - purchased floor
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 200,000
Weighted Average Maturity (in years)	4 years
Fair Value Asset (Liability)	$ 1,104
Designated as hedging instrument \| Cash flow hedges \| Collar - written cap
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 200,000
Weighted Average Maturity (in years)	4 years
Fair Value Asset (Liability)	$ (2,556)
Designated as hedging instrument \| Cash flow hedges \| Interest rate swap on variable rate loans
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount		$ 50,000	$ 50,000
Weighted Average Maturity (in years)		2 months 12 days
Fair Value Asset (Liability)		$ (336)
Designated as hedging instrument \| Fair Value Hedging
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	37,190	37,190
Fair Value Asset (Liability)	3,211	2,374
Designated as hedging instrument \| Fair Value Hedging \| Interest rate swap on deposits
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 37,190	$ 37,190
Weighted Average Maturity (in years)	2 years 9 months 18 days	3 years 7 months 6 days
Fair Value Asset (Liability)	$ 3,211	$ 2,374
Carrying Amount of Hedged Assets	27,415	31,366
Cumulative Amount of Fair Value Hedging Adjustment in Carrying Amount	(9,775)	(5,824)
Designated as hedging instrument \| Economic hedges
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	1,222,554	1,114,032
Fair Value Asset (Liability)	394	(14)
Designated as hedging instrument \| Economic hedges \| Forward sale commitments
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 14,486	5,248
Weighted Average Maturity (in years)	1 month 6 days
Fair Value Asset (Liability)	$ 394	(14)
Designated as hedging instrument \| Economic hedges \| Customer loan derivative liability \| MNA Counterparty
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 397,699	$ 358,846
Weighted Average Maturity (in years)	4 years 3 months 18 days	4 years 9 months 18 days
Fair Value Asset (Liability)	$ (19,666)	$ (4,264)
Designated as hedging instrument \| Economic hedges \| Customer loan derivative liability \| RPA Counterparty
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 206,335	$ 195,546
Weighted Average Maturity (in years)	4 years 1 month 6 days	4 years 6 months
Fair Value Asset (Liability)		$ (2,070)
Designated as hedging instrument \| Economic hedges \| Customer loan derivative liability \| RPA Customer
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 206,335	$ 195,546
Weighted Average Maturity (in years)	4 years 1 month 6 days	4 years 6 months
Fair Value Asset (Liability)		$ 2,070
Designated as hedging instrument \| Economic hedges \| Customer loan derivative asset \| MNA Customer
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 397,699	$ 358,846
Weighted Average Maturity (in years)	4 years 3 months 18 days	4 years 9 months 18 days
Fair Value Asset (Liability)	$ 19,666	$ 4,264
Not designated as hedging instrument
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	5,952	2,698
Fair Value Asset (Liability)	(34)	98
Not designated as hedging instrument \| Interest Rate Lock Commitment
DERIVATIVE FINANCIAL INSTRUMENTS AND HEDGING ACTIVITIES
Notional Amount	$ 5,952	$ 2,698
Weighted Average Maturity (in years)	1 month 6 days	1 month 6 days
Fair Value Asset (Liability)	$ (34)	$ 98

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482106/820-10-50-2

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- Definition

Average period remaining until maturity of derivative contract, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
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-Name Accounting Standards Codification
-Section 50
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-URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A

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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

Amount of asset hedged in fair value hedging relationship.

+ References

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-Topic 815
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- Definition

Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
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