Condensed Consolidated Statements of Changes in Retained Earnings, Accumulated Other Comprehensive Loss and Noncontrolling Interests - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 44,906	$ 21,180	$ 128,141	$ 82,816
Pension and post-retirement plan adjustments, net of tax	2,299	3,701	6,893	11,070
Reclassification from accumulated other comprehensive loss into net income	2,912	0	2,912	0
Income attributable to noncontrolling interests	0	0	0	(448)
Preferred dividends	(10)	(10)	(30)	(30)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,098,048	1,130,661	1,050,214	1,103,092
Net income	44,906	21,180	128,141	83,264
Distributions to noncontrolling interests (Note 19)				(5,632)
Income attributable to noncontrolling interests		(5,632)		(448)
Common dividends	(18,036)	(17,245)	(53,417)	(51,292)
Preferred dividends	(10)	(10)	(30)	(30)
Ending balance	1,124,908	1,128,954	1,124,908	1,128,954
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(170,278)	(179,145)	(149,140)	(182,397)
Foreign currency translation adjustments	(32,361)	(13,868)	(58,075)	(18,073)
Pension and post-retirement plan adjustments, net of tax	2,299	3,701	6,893	11,070
Unrealized net gains (losses) on available-for-sale securities	13	(11)	(5)	(15)
Reclassification from accumulated other comprehensive loss into net income	2,912		2,912
Income attributable to noncontrolling interests				92
Ending balance	(197,415)	(189,323)	(197,415)	(189,323)
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	0	8,349	0	7,993
Acquisition of noncontrolling interest in consolidated subsidiaries		8,349		8,349
Income attributable to noncontrolling interests				356
Ending balance	$ 0	$ 0	$ 0	$ 0