Condensed Consolidated Statements of Changes in Retained Earnings, Accumulated Other Comprehensive Loss and Noncontrolling Interests - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ (150,173)	$ 35,542
Pension and post-retirement plan adjustments, net of tax	439	2,264
Preferred dividends	(10)	(10)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,158,347	1,050,214
Net income	(150,173)	35,542
Common dividends	(18,035)	(17,282)
Preferred dividends	(10)	(10)
Ending balance	990,129	1,068,464
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(158,717)	(149,140)
Foreign currency translation adjustments	11,194	5,892
Pension and post-retirement plan adjustments, net of tax	439	2,264
Unrealized net gains (losses) on available-for-sale securities	2	(9)
Ending balance	$ (147,082)	$ (140,993)