ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	$ 763,327
Balance at the end of the period	769,042	$ 763,327
Foreign Currency Translation Adjustment
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(24,581)	(23,368)
Other comprehensive earnings (loss) before reclassifications	(301)	(1,213)
Other comprehensive earnings (loss) net of tax	(301)	(1,213)
Balance at the end of the period	(24,882)	(24,581)
Investments
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	1,992	882
Other comprehensive earnings (loss) before reclassifications	(3,205)	1,110
Reclassifications from accumulated other comprehensive loss	(73)
Other comprehensive earnings (loss) net of tax	(3,278)	1,110
Balance at the end of the period	(1,286)	1,992
Foreign Currency Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	589	10
Other comprehensive earnings (loss) before reclassifications	70	520
Reclassifications from accumulated other comprehensive loss	(337)	59
Other comprehensive earnings (loss) net of tax	(267)	579
Balance at the end of the period	322	589
Commodity Derivatives
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	713	92
Other comprehensive earnings (loss) before reclassifications	1,009	434
Reclassifications from accumulated other comprehensive loss	(1,628)	187
Other comprehensive earnings (loss) net of tax	(619)	621
Balance at the end of the period	94	713
Postretirement and Pension Benefits
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	1,472	2,139
Other comprehensive earnings (loss) before reclassifications	332	356
Reclassifications from accumulated other comprehensive loss	(1,065)	(1,023)
Other comprehensive earnings (loss) net of tax	(733)	(667)
Balance at the end of the period	739	1,472
Accumulated Other Comprehensive Earnings (Loss).
Accumulated other comprehensive earnings (loss), net of tax
Balance at the beginning of the period	(19,815)	(20,245)
Other comprehensive earnings (loss) before reclassifications	(2,095)	1,207
Reclassifications from accumulated other comprehensive loss	(3,103)	(777)
Other comprehensive earnings (loss) net of tax	(5,198)	430
Balance at the end of the period	$ (25,013)	$ (19,815)