CAPITAL RATIOS AND SHAREHOLDERS' EQUITY - Components of AOCI (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income	$ (62,589)		$ 2,303
Net unrealized gain (loss) on AFS securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before tax:	(76,606)		2,580
Income taxes related to items of accumulated other comprehensive income:	17,891		(595)
Accumulated other comprehensive income	(58,715)	$ (38,304)	1,985	$ 4,398	$ 7,237	$ 10,023
Net unrealized gain (loss) on hedging derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before tax:	(4,316)		1,130
Income taxes related to items of accumulated other comprehensive income:	994		(260)
Accumulated other comprehensive income	(3,322)	(2,115)	870	(92)	63	(1,865)
Net unrealized gain (loss) on post-retirement plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive income, before tax:	(718)		(718)
Income taxes related to items of accumulated other comprehensive income:	166		166
Accumulated other comprehensive income	$ (552)	$ (552)	$ (552)	$ (1,418)	$ (1,418)	$ (1,418)