Condensed Consolidated Statements of Changes in Retained Earnings, Accumulated Other Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 66,648	$ 65,256	$ 197,021	$ (17,827)
Pension and post-retirement plan adjustments, net of tax	14	188	2,410	742
Reclassification from accumulated other comprehensive loss into net income (loss)(b)	0	101	(1,200)	101
Preferred dividends	(10)	(10)	(30)	(30)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,235,226	1,038,750	1,143,442	1,158,347
Net loss	66,648	65,256	197,021	(17,827)
Common dividends	(20,071)	(18,475)	(58,640)	(54,969)
Preferred dividends	(10)	(10)	(30)	(30)
Ending balance	1,281,793	1,085,521	1,281,793	1,085,521
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(147,548)	(141,928)	(129,249)	(158,717)
Foreign currency translation adjustments	21,329	(18,771)	1,834	(2,538)
Pension and post-retirement plan adjustments, net of tax	14	188	2,410	742
Unrealized net gains (losses) on available-for-sale securities				2
Reclassification from accumulated other comprehensive loss into net income (loss)(b)		101	(1,200)	101
Ending balance	$ (126,205)	$ (160,410)	$ (126,205)	$ (160,410)