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LOANS AND ALLOWANCE FOR CREDIT LOSSES ON LOANS - MODIFICATIONS (Details)	3 Months Ended				12 Months Ended
	Mar. 31, 2026 USD ($) loan	Dec. 31, 2025 USD ($) loan	Jun. 30, 2025 USD ($) loan	Mar. 31, 2025 loan	Dec. 31, 2025 USD ($)
Troubled Debt Restructurings disclosures
Number of Loans with payment default | loan	0			0
Collateral Dependent Loans
Troubled Debt Restructurings disclosures
Loan modifications	$ 0				$ 5,000,000
Loans outstanding	$ 35,000,000	$ 33,000,000			$ 33,000,000
Number of Loans | loan	5	7	2
Recorded Investment	$ 9,000,000	$ 13,000,000	$ 4,000,000
Collateral dependent loan one | Commercial Real Estate - Owner Occupied | Commercial real estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	1	2	1
Recorded Investment		$ 5,000,000	$ 250,000
Average deferral period	7 months	3 months	3 months		3 months
Collateral dependent loan one | Commercial Real Estate - Non Owner Occupied | Commercial real estate
Troubled Debt Restructurings disclosures
Recorded Investment	$ 7,000,000
Collateral dependent loan two | Commercial Real Estate - Owner Occupied | Commercial real estate
Troubled Debt Restructurings disclosures
Recorded Investment	$ 206,000
Collateral dependent loan two | Commercial Real Estate - Non Owner Occupied | Commercial real estate
Troubled Debt Restructurings disclosures
Number of Loans | loan	1	1	1
Recorded Investment		$ 380,000	$ 4,000,000
Average deferral period	4 months	3 months	12 months		3 months
Collateral dependent loan three | Commercial and Industrial | Commercial & industrial
Troubled Debt Restructurings disclosures
Number of Loans | loan	1	1
Recorded Investment	$ 2,000,000	$ 25,000
Average deferral period	40 months	3 months			3 months
Collateral dependent loan four | Commercial Real Estate - Owner Occupied | Commercial real estate
Troubled Debt Restructurings disclosures
Number of Loans | loan		1
Recorded Investment		$ 7,000,000
Average deferral period		6 months			6 months
Collateral dependent loan four | Commercial and Industrial | Commercial & industrial
Troubled Debt Restructurings disclosures
Number of Loans | loan	1
Recorded Investment	$ 64,000
Average deferral period	13 months
Collateral Dependent Loan five | Commercial and Industrial | Commercial & industrial
Troubled Debt Restructurings disclosures
Number of Loans | loan		1
Recorded Investment		$ 47,000
Average deferral period		12 months			12 months
Collateral Dependent Loan five | Home Equity | Residential Portfolio Segment [Member]
Troubled Debt Restructurings disclosures
Number of Loans | loan	1
Recorded Investment	$ 152,000
Average deferral period	13 months
Collateral dependent loan six | Commercial and Industrial | Commercial & industrial
Troubled Debt Restructurings disclosures
Number of Loans | loan		1
Recorded Investment		$ 200,000
Average deferral period		12 months			12 months

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