ACCUMULATED OTHER COMPREHENSIVE INCOME - Reclassifications (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income	$ 79,220	$ 48,034
Net securities gains	16	0
Income tax expense	3,771	4,539
Other expense	2,562	3,239
Net income	24,278	23,642
Amount Reclassified From Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(386)	(27)
Amount Reclassified From Accumulated Other Comprehensive Income | Held-to-Maturity Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest income	(491)
Income tax expense	100
Net income	(375)
Amount Reclassified From Accumulated Other Comprehensive Income | Available-for-Sale Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net securities gains	16
Amount Reclassified From Accumulated Other Comprehensive Income | Defined Benefit Pension Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax expense	4	9
Other expense	(15)	(36)
Net income	$ (11)	$ (27)