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Other Comprehensive Earnings (Tables)
6 Months Ended
Jun. 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 six months ended June 30, 2021 and 2020 were as follows:
Three Months Ended June 30,Six Months Ended June 30,
2021202020212020
Pension plans:
Amortization of actuarial losses$3,074 $2,150 $6,159 $4,307 
Amortization of prior service costs277 365 548 730 
Total before tax3,351 2,515 6,707 5,037 
Tax benefit(774)(421)(1,548)(989)
Net of tax$2,577 $2,094 $5,159 $4,048 
Cash flow hedges:
Net (gains) losses reclassified into earnings$(1,877)$(752)$(3,710)$668 
Tax provision (benefit)417 158 839 (140)
Net of tax$(1,460)$(594)$(2,871)$528