ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary of Changes in Accumulated Other Comprehensive Loss by Component (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 548,980
Ending balance	800,430
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(15,172)	$ (19,387)
Gains arising during period	100	2,326
Amounts reclassified from accumulated other comprehensive loss	(136)	(870)
Income tax benefit	53	63
Net other comprehensive income (loss)	17	1,519
Ending balance	(15,155)	(17,868)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(12,120)	(15,187)
Gains arising during period	0
Amounts reclassified from accumulated other comprehensive loss	(347)	(227)
Income tax benefit	53	63
Net other comprehensive income (loss)	(294)	(164)
Ending balance	(12,414)	(15,351)
Accumulated Other-than-Temporary Impairment of Investment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(2,667)	(2,878)
Gains arising during period	0
Amounts reclassified from accumulated other comprehensive loss	105	106
Income tax benefit	0
Net other comprehensive income (loss)	105	106
Ending balance	(2,562)	(2,772)
Interest Rate Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(385)	(1,322)
Gains arising during period	100	2,326
Amounts reclassified from accumulated other comprehensive loss	106	(749)
Income tax benefit	0
Net other comprehensive income (loss)	206	1,577
Ending balance	$ (179)	$ 255