Condensed Consolidated Statements of Changes in Retained Earnings, Accumulated Other Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	$ 58,139	$ (150,173)
Pension and post-retirement plan adjustments, net of tax	374	439
Preferred dividends	(10)	(10)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,143,442	1,158,347
Net loss	58,139	(150,173)
Common dividends	(18,480)	(18,035)
Preferred dividends	(10)	(10)
Ending balance	1,183,091	990,129
Accumulated Other Comprehensive (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(129,249)	(158,717)
Foreign currency translation adjustments	(10,673)	11,194
Pension and post-retirement plan adjustments, net of tax	374	439
Unrealized net gains (losses) on available-for-sale securities		2
Ending balance	$ (139,548)	$ (147,082)