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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 $ 111,620 $ 99,624 $ 219,352 $ 197,207
Pension plans and other postretirement benefits:        
Amortization of prior service cost (credit) included in net periodic benefit cost (income), net of income tax expense (benefit) of $(173) in second quarter 2024, $(170) in second quarter 2023, $(347) in six months 2024, and $(341) in six months 2023. (502) (546) (1,004) (1,093)
Amortization of actuarial net loss (gain) included in net periodic benefit cost (income), net of income tax expense (benefit) of $(122) in second quarter 2024, $(119) in second quarter 2023, $(244) in six months 2024, and $(237) in six months 2023. (357) (374) (715) (749)
Total pension plans and other postretirement benefits (859) (920) (1,719) (1,842)
Foreign currency translation adjustments, net of income tax expense (benefit) of $(850) in second quarter 2024, $491 in second quarter 2023, $(1,088) in six months 2024, and $698 in six months 2023. (4,364) 7,714 (11,307) 19,080
Other comprehensive income (loss) (5,223) 6,794 (13,026) 17,238
Comprehensive income $ 106,397 $ 106,418 $ 206,326 $ 214,445