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Consolidated Condensed Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 11,747	$ 32,909
Other comprehensive loss:
Pension benefit obligations	(29)
Foreign currency translation adjustments	(9,294)	(13,152)
Unrealized gain (loss) on foreign currency derivative securities, net of tax	464	(522)
Unrealized loss on commodity derivative securities, net of tax	5
Other comprehensive loss, net of tax	(8,806)	(13,674)
Comprehensive income	$ 2,941	$ 19,235

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