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Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Statement of Comprehensive Income [Abstract]    
Net income $ 73,281 $ 57,600
Other comprehensive income (loss), net of tax:    
Changes in net prior service credit and actuarial losses 1,878 939
Change in fair value of derivatives 641 (2,455)
Foreign currency translation (33,372) (36,439)
Other comprehensive loss (30,853) (37,955)
Comprehensive income $ 42,428 $ 19,645