COMPREHENSIVE (LOSS) INCOME (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accumulated other comprehensive (loss) income
Balance at beginning of period	$ 583,759	$ 616,976
Balance at end of period	577,683	599,794
Postretirement Benefit
Accumulated other comprehensive (loss) income
Balance at beginning of period	85	150
Other comprehensive income (loss) before reclassifications	(1)
Amounts reclassified from accumulated other comprehensive (loss) income	(20)
Net current period other comprehensive (loss) income	(21)
Balance at end of period	64	150
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive (loss) income
Balance at beginning of period	(43,622)	(47,082)
Other comprehensive income (loss) before reclassifications	(4,223)	6,919
Amounts reclassified from accumulated other comprehensive (loss) income	(1,255)	(1,018)
Net current period other comprehensive (loss) income	(5,478)	5,901
Related tax effect	496	(1,229)
Balance at end of period	(48,604)	(42,410)
Available for Sale Securities
Accumulated other comprehensive (loss) income
Balance at beginning of period	(47,373)	(53,212)
Other comprehensive income (loss) before reclassifications	(4,940)	7,089
Net current period other comprehensive (loss) income	(4,940)	7,089
Related tax effect	348	(1,563)
Balance at end of period	(51,965)	(47,686)
Cash Flow Hedge
Accumulated other comprehensive (loss) income
Balance at beginning of period	3,666	5,980
Other comprehensive income (loss) before reclassifications	718	(170)
Amounts reclassified from accumulated other comprehensive (loss) income	(1,235)	(1,018)
Net current period other comprehensive (loss) income	(517)	(1,188)
Related tax effect	148	334
Balance at end of period	$ 3,297	$ 5,126