ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Summary of changes in AOCI by component (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 1,319,112	$ 1,270,069	$ 1,220,434
Unrealized/Unrecognized gains (losses) on debt securities
Unrealized holding gains (losses) on debt securities available for sale, net of tax	(199,302)	(58,610)	21,561
Unrealized losses on debt securities transferred to held to maturity from available for sale, net of tax	(34,644)	0	0
Amounts reclassified from AOCI, net of tax	19	(44)	1,228
Amortization of unrealized losses on securities transferred to held to maturity, net of tax	(4,745)	0	0
Unrealized gains (losses) on cash flow hedges:
Unrealized holding gains (losses) on cash flow hedges, net of tax	(20,717)	736	(2,526)
Amounts reclassified from AOCI, net of tax	(417)	(763)	(542)
Ending balance	1,145,977	1,319,112	1,270,069
AOCI
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) beginning balance period, before tax	(33,230)	46,589
Accumulated other comprehensive income (loss) beginning balance period, tax effect	9,472	(13,280)
Beginning balance	(23,758)	33,309	14,960
Unrealized gains (losses) on cash flow hedges:
Accumulated other comprehensive income (loss) ending balance period, before tax	(382,228)	(33,230)	46,589
Accumulated other comprehensive income (loss) ending balance period, tax effect	108,950	9,472	(13,280)
Ending balance	(273,278)	(23,758)	33,309
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) beginning balance period, before tax	(32,272)	49,644	21,192
Accumulated other comprehensive income (loss) beginning balance period, tax effect	9,199	(14,151)	(6,032)
Beginning balance	(23,073)	35,493	15,160
Unrealized/Unrecognized gains (losses) on debt securities
Unrealized holding gains (losses) on debt securities available for sale, before tax	(278,762)	(81,977)	30,176
Unrealized holding gains (losses) on debt securities available for sale, tax effect	79,460	23,367	(8,615)
Unrealized holding gains (losses) on debt securities available for sale, net of tax	(199,302)	(58,610)	21,561
Unrealized gains on debt securities transferred from held to maturity to available for sale, before tax	(48,456)
Unrealized losses on debt securities transferred to held to maturity from available for sale, tax effect	13,812	0	0
Unrealized losses on debt securities transferred to held to maturity from available for sale, net of tax	(34,644)
Amounts reclassified from AOCI, before tax	(26)	61	(1,724)
Amounts reclassified from AOCI, tax effect	7	(17)	496
Amounts reclassified from AOCI, net of tax	(19)	44	(1,228)
Amortization of unrealized losses on securities transferred to held to maturity, before tax	6,638
Amortization of unrealized losses on securities transferred to held to maturity, tax effect	(1,893)	0	0
Amortization of unrealized losses on securities transferred to held to maturity, net of tax	4,745
Unrealized gains (losses) on cash flow hedges:
Accumulated other comprehensive income (loss) ending balance period, before tax	(352,878)	(32,272)	49,644
Accumulated other comprehensive income (loss) ending balance period, tax effect	100,585	9,199	(14,151)
Ending balance	(252,293)	(23,073)	35,493
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Accumulated other comprehensive income (loss) beginning balance period, before tax	(958)	(3,055)	(280)
Accumulated other comprehensive income (loss) beginning balance period, tax effect	273	871	80
Beginning balance	(685)	(2,184)	(200)
Unrealized gains (losses) on cash flow hedges:
Unrealized holding gains (losses) on cash flow hedges, before tax	(28,975)	1,030	(3,533)
Unrealized holding gains (losses) on cash flow hedges, tax effect	8,258	(294)	1,007
Unrealized holding gains (losses) on cash flow hedges, net of tax	(20,717)	736	(2,526)
Amounts reclassified from AOCI, before tax	583	1,067	758
Amounts reclassified from AOCI, tax effect	(166)	(304)	(216)
Amounts reclassified from AOCI, net of tax	417	763	542
Accumulated other comprehensive income (loss) ending balance period, before tax	(29,350)	(958)	(3,055)
Accumulated other comprehensive income (loss) ending balance period, tax effect	8,365	273	871
Ending balance	$ (20,985)	$ (685)	$ (2,184)