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Other Comprehensive Earnings (Tables)
9 Months Ended
Sep. 30, 2021
Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of amounts reclassified from accumulated other comprehensive income (loss) to earnings
Amounts reclassified from accumulated other comprehensive loss to earnings during the three and nine months ended September 30, 2021 and 2020 were as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2021202020212020
Pension plans:
Amortization of actuarial losses$3,064 $2,194 $9,223 $6,501 
Amortization of prior service costs274 358 823 1,086 
Total before tax3,338 2,552 10,046 7,587 
Tax benefit(771)(421)(2,320)(1,408)
Net of tax$2,567 $2,131 $7,726 $6,179 
Cash flow hedges:
Net (gains) losses reclassified into earnings$(267)$(266)$(3,977)$402 
Tax provision (benefit)61 56 900 (84)
Net of tax$(206)$(210)$(3,077)$318