Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 72,234	$ 67,090	$ 130,373	$ (83,083)
Other comprehensive (loss) gain, net of tax:
Foreign currency translation adjustments (Note 6)	(8,822)	5,039	(19,495)	16,233
Pension and post-retirement plan adjustments, net of tax (Note 6)	2,022	115	2,396	554
Unrealized gain on available-for-sale securities (Note 6)	0	0	0	2
Reclassification of currency translation from accumulated other comprehensive loss into net income (Note 6)	(1,200)	0	(1,200)	0
Total other comprehensive (loss) gain, net of tax	(8,000)	5,154	(18,299)	16,789
Comprehensive income (loss)	$ 64,234	$ 72,244	$ 112,074	$ (66,294)