ACCUMULATED OTHER COMPREHENSIVE LOSS - Amount Reclassified from AOCL (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Asset Acquisition [Line Items]
Other components of net periodic benefit credit	$ (18,230)	$ (15,803)	$ (20,215)
Tax benefit	(19,106)	(42,489)	6,781
Net income	127,848	190,085	$ 51,376
Reclassification out of Accumulated Other Comprehensive Income | Prior service cost
Asset Acquisition [Line Items]
Other components of net periodic benefit credit	(81)	(81)
Reclassification out of Accumulated Other Comprehensive Income | Net actuarial loss
Asset Acquisition [Line Items]
Other components of net periodic benefit credit	1,104	1,712
Reclassification out of Accumulated Other Comprehensive Income | Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest
Asset Acquisition [Line Items]
Total before tax	1,023	1,631
Tax benefit	(286)	(456)
Net income	$ 737	$ 1,175