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INVESTMENT SECURITIES - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Dec. 31, 2025
INVESTMENT SECURITIES
Fair value of debt securities reported less than their historical cost	$ 513,800		$ 523,800
Available-for-sale securities, Fair Value	$ 428,111		$ 409,021
Available sale of debt securities reported less than their historical cost percent of investment portfolio	83.30%		78.10%
Amortized Carrying Value	$ 177,594		$ 179,200
Total fair value of held-to-maturity	160,520		162,629
Available for sale securities sold	0	$ 0
Allowance for credit losses on securities	0
Available-for-sale securities	$ 513,846		$ 523,831

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