Condensed Consolidated Statements of Changes in Retained Earnings, Accumulated Other Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 86,194	$ 62,773	$ 157,463	$ 122,378
Pension and post-retirement plan adjustments, net of tax	313	242	641	443
Unrecognized net loss on cash flow hedges (Note 17)	110	0	(45)	0
Reclassification from accumulated other comprehensive loss into net income (Note 7)	(33)	0	(33)	0
Preferred dividends	(10)	(10)	(20)	(20)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,596,938	1,389,222	1,546,230	1,349,650
Net income		62,773	157,463	122,378
Common dividends	(20,843)	(20,838)	(41,394)	(40,861)
Preferred dividends	(10)	(10)	(20)	(20)
Ending balance	1,662,279	1,431,147	1,662,279	1,431,147
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(47,682)	(118,911)	(41,781)	(141,649)
Foreign currency translation adjustments	(2,188)	44,143	(8,262)	66,680
Pension and post-retirement plan adjustments, net of tax	313	242	641	443
Unrecognized net loss on cash flow hedges (Note 17)	110
Reclassification from accumulated other comprehensive loss into net income (Note 7)	(33)		(33)
Ending balance	$ (49,480)	$ (74,526)	$ (49,480)	$ (74,526)