Condensed Consolidated Statements of Changes in Retained Earnings, Accumulated Other Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 69,613	$ 66,648	$ 191,991	$ 197,021
Pension and post-retirement plan adjustments, net of tax	308	14	751	2,410
Reclassification from accumulated other comprehensive loss into net income(b)	0	0	0	(1,200)
Preferred dividends	(10)	(10)	(30)	(30)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,431,147	1,235,226	1,349,650	1,143,442
Net income	69,613	66,648	191,991	197,021
Common dividends	(20,747)	(20,071)	(61,608)	(58,640)
Preferred dividends	(10)	(10)	(30)	(30)
Ending balance	1,480,003	1,281,793	1,480,003	1,281,793
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(74,526)	(147,548)	(141,649)	(129,249)
Foreign currency translation adjustments	(1,631)	21,329	65,049	1,834
Pension and post-retirement plan adjustments, net of tax	308	14	751	2,410
Reclassification from accumulated other comprehensive loss into net income(b)				(1,200)
Ending balance	$ (75,849)	$ (126,205)	$ (75,849)	$ (126,205)