ACCUMULATED OTHER COMPREHENSIVE INCOME - Changes in accumulated other comprehensive income by component, net of tax (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		$ 345,597	$ 366,534	$ 355,640	$ 393,718
Other comprehensive (loss) income before reclassification		628	(2,491)	(641)	1,457
Amounts reclassified from accumulated other comprehensive income		(1,623)	1,536	(4,889)	3,890
Net current period other comprehensive (loss) gain	[1]	2,251	(4,027)	4,248	(2,433)
Balance at end of period		339,299	359,149	339,299	359,149
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		(20,883)	(23,125)	(22,880)	(24,719)
Net current period other comprehensive (loss) gain		2,251	(4,027)	4,248	(2,433)
Balance at end of period		(18,632)	(27,152)	(18,632)	(27,152)
Unrealized Gains and (Losses) on Cash Flow Hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		10,323	12,450	7,582	11,091
Other comprehensive (loss) income before reclassification		(7,940)	3,435	(8,461)	7,144
Amounts reclassified from accumulated other comprehensive income		(1,620)	1,535	(4,882)	3,885
Net current period other comprehensive (loss) gain		(6,320)	1,900	(3,579)	3,259
Balance at end of period		4,003	14,350	4,003	14,350
Unrealized Gains and (Losses) on Available-for-Sale Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		(31,447)	(35,944)	(30,699)	(36,183)
Other comprehensive (loss) income before reclassification		8,568	(5,926)	7,820	(5,687)
Amounts reclassified from accumulated other comprehensive income		0	0	0	0
Net current period other comprehensive (loss) gain		8,568	(5,926)	7,820	(5,687)
Balance at end of period		(22,879)	(41,870)	(22,879)	(41,870)
Post-Retirement Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period		241	369	237	373
Other comprehensive (loss) income before reclassification		0	0	0	0
Amounts reclassified from accumulated other comprehensive income		(3)	1	(7)	5
Net current period other comprehensive (loss) gain		3	(1)	7	(5)
Balance at end of period		$ 244	$ 368	$ 244	$ 368

[1] Reflects deferred tax valuation allowance.