ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary of Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 548,980
Ending balance	531,533
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(15,172)	$ (19,387)
Gains (losses) arising during period	(8)	1,975
Amounts reclassified from accumulated other comprehensive loss	(75)	(601)
Income tax benefit (expense)	(5)	34
Net other comprehensive income (loss)	(88)	1,408
Ending balance	(15,260)	(17,979)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(12,120)	(15,187)
Gains (losses) arising during period	0
Amounts reclassified from accumulated other comprehensive loss	(176)	(107)
Income tax benefit (expense)	(5)	34
Net other comprehensive income (loss)	(181)	(73)
Ending balance	(12,301)	(15,260)
Accumulated Other-than-Temporary Impairment of Investment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,667)	(2,878)
Gains (losses) arising during period	0
Amounts reclassified from accumulated other comprehensive loss	53	53
Income tax benefit (expense)	0
Net other comprehensive income (loss)	53	53
Ending balance	(2,614)	(2,825)
Interest Rate Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(385)	(1,322)
Gains (losses) arising during period	(8)	1,975
Amounts reclassified from accumulated other comprehensive loss	48	(547)
Income tax benefit (expense)	0
Net other comprehensive income (loss)	40	1,428
Ending balance	$ (345)	$ 106