CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net Income (Loss)	$ 100,314	$ 34,917	$ 144,926	$ 146,643
Amortization of unrecognized net periodic benefit credit, net of tax: (2024 - Three-month period $64, Nine-month period $193) (2023 - Three-month period $86, Nine-month period $257)
Net actuarial gain	(185)	(247)	(557)	(741)
Interest rate swap and foreign currency translation:
Change in unrealized loss on interest rate swap, net of tax: (2024 - Three-month period $107, Nine-month period $389) (2023 - Three-month period $127, Nine-month period $277)	(304)	(360)	(1,102)	(781)
Change in foreign currency translation, net of tax: (2024 - Three-month period $127, Nine-month period $113) (2023 - Three-month period $132, Nine-month period $3)	362	(376)	(319)	5
OTHER COMPREHENSIVE LOSS, net of tax	(127)	(983)	(1,978)	(1,517)
TOTAL COMPREHENSIVE INCOME	$ 100,187	$ 33,934	$ 142,948	$ 145,126