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Postretirement Benefit Cost (Tables)
6 Months Ended
Jun. 30, 2021
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The components of Net periodic benefit cost of the Company’s pension plan are as follows:
Three Months Ended
June 30,
Six Months Ended
June 30,
2021202020212020
Service cost$1,954 $2,005 $3,908 $4,010 
Interest cost518 544 1,036 1,088 
Expected return on plan assets(731)(524)(1,462)(1,049)
Amortization of actuarial net losses86 — 172 — 
Net periodic benefit cost$1,827 $2,025 $3,654 $4,049