DERIVATIVE FINANCIAL INSTRUMENTS - Interest rate contracts not designated as hedging instruments (Details) - Not designated - Interest rate swap - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
DERIVATIVE FINANCIAL INSTRUMENTS
Gross gains	$ 2,737	$ 5,413
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other Operating Income	Noninterest Income, Other Operating Income
Gross losses	$ (2,737)	$ (5,413)
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]	Noninterest Income, Other Operating Income	Noninterest Income, Other Operating Income
Other assets
DERIVATIVE FINANCIAL INSTRUMENTS
Derivative asset notional amount	$ 119,605		$ 106,995
Derivative financial assets fair value	7,089		6,981
Other assets \| Financial Institutions Borrower
DERIVATIVE FINANCIAL INSTRUMENTS
Derivative asset notional amount	119,605		106,995
Derivative financial assets fair value	7,089		6,981
Other liabilities
DERIVATIVE FINANCIAL INSTRUMENTS
Derivative liability notional amount	119,605		106,995
Derivative financial liabilities fair value	(7,089)		(6,981)
Other liabilities \| Commercial Borrower
DERIVATIVE FINANCIAL INSTRUMENTS
Derivative liability notional amount	119,605		106,995
Derivative financial liabilities fair value	$ (7,089)		$ (6,981)

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