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LOANS AND ALLOWANCE FOR CREDIT LOSSES - Performance of loans (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2025	Dec. 31, 2024
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications	$ 0	$ 2,810,000
Other residential (multi-family)
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications		2,709,000
Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications		70,000
Consumer
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications		31,000
Current
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications		2,810,000
Current | Other residential (multi-family)
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications		2,709,000
Current | Commercial real estate
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications		70,000
Current | Consumer
LOANS AND ALLOWANCE FOR CREDIT LOSSES
Loan modifications		$ 31,000

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