SHAREHOLDERS' EQUITY AND EARNINGS PER COMMON SHARE - Components of AOCI (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss) income	$ (58,340)	$ 2,303
Net unrealized (loss) gain on AFS securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before tax:	(71,832)	2,580
Income taxes related to items of accumulated other comprehensive income:	16,586	(595)
Accumulated other comprehensive (loss) income	(55,246)	1,985	$ 10,023	$ 5,549
Net unrealized gain (loss) on cash flow hedging derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before tax:	(2,333)	1,130
Income taxes related to items of accumulated other comprehensive income:	539	(260)
Accumulated other comprehensive (loss) income	(1,794)	870	(1,865)	(600)
Net unrealized loss on post-retirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before tax:	(1,691)	(718)
Income taxes related to items of accumulated other comprehensive income:	391	166
Accumulated other comprehensive (loss) income	$ (1,300)	$ (552)	$ (1,418)	$ (1,157)