ACCUMULATED OTHER COMPREHENSIVE INCOME - Changes in accumulated other comprehensive income by component, net of tax (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		$ 429,471	$ 205,600
Other comprehensive income (loss) before reclassification		(10,502)	317
Amounts reclassified from accumulated other comprehensive income		370	280
Total other comprehensive (loss) income, net of tax	[1]	(10,132)	597
Balance at end of period		420,214	205,452
Accumulated Other Comprehensive Income (Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		(372)	(1,031)
Total other comprehensive (loss) income, net of tax		(10,132)	597
Balance at end of period		(10,504)	(434)
Unrealized Gains and (Losses) on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		(246)	(3,986)
Other comprehensive income (loss) before reclassification		5,237	3,071
Amounts reclassified from accumulated other comprehensive income		322	243
Total other comprehensive (loss) income, net of tax		5,559	3,314
Balance at end of period		5,313	(672)
Unrealized gains on securities available for sale: Realized (losses) gains on securities available for sale
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		1,091	4,208
Other comprehensive income (loss) before reclassification		(15,739)	(2,754)
Amounts reclassified from accumulated other comprehensive income		0	0
Total other comprehensive (loss) income, net of tax		(15,739)	(2,754)
Balance at end of period		(14,648)	1,454
Defined Benefit Pension Items
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		(1,217)	(1,253)
Other comprehensive income (loss) before reclassification		0	0
Amounts reclassified from accumulated other comprehensive income		48	37
Total other comprehensive (loss) income, net of tax		48	37
Balance at end of period		$ (1,169)	$ (1,216)

[1] The 2022 period tax is inclusive of a deferred tax valuation allowance.