ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	$ 1,192,620	$ 701,096	$ 596,758
Total other comprehensive (loss) income, net of tax	(88,198)	(257)	16
Balance	1,169,583	1,192,620	701,096
Accumulated Other Comprehensive (Loss) Income
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(6,181)	(5,924)	(5,940)
Other comprehensive (loss) income before reclassifications	(86,564)	670
Amounts reclassified from accumulated other comprehensive loss	(1,634)	(927)
Total other comprehensive (loss) income, net of tax	(88,198)	(257)	16
Balance	(94,379)	(6,181)	(5,924)
Securities Available-for-Sale
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(7,864)	12,694
Other comprehensive (loss) income before reclassifications	(95,030)	(19,733)
Amounts reclassified from accumulated other comprehensive loss	2,024	(825)
Total other comprehensive (loss) income, net of tax	(93,006)	(20,558)
Balance	(100,870)	(7,864)	12,694
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(1,306)	(6,086)
Other comprehensive (loss) income before reclassifications	(1,413)	5,520
Amounts reclassified from accumulated other comprehensive loss	(2,547)	(740)
Total other comprehensive (loss) income, net of tax	(3,960)	4,780
Balance	(5,266)	(1,306)	(6,086)
Derivatives
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	2,989	(12,532)
Other comprehensive (loss) income before reclassifications	9,879	14,883
Amounts reclassified from accumulated other comprehensive loss	(1,111)	638
Total other comprehensive (loss) income, net of tax	8,768	15,521
Balance	$ 11,757	$ 2,989	$ (12,532)