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Other Comprehensive Earnings (Tables)
3 Months Ended
Mar. 31, 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 months ended March 31, 2021 and 2020 were as follows:
Three Months Ended March 31,
20212020
Pension and other postretirement benefit plans:
Amortization of actuarial losses$3,085 $2,158 
Amortization of prior service costs270 365 
Total before tax3,355 2,523 
Tax benefit(773)(568)
Net of tax$2,582 $1,955 
Cash flow hedges:
Net (gains) losses reclassified into earnings$(1,833)$1,420 
Tax provision (benefit)422 (299)
Net of tax$(1,411)$1,121