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Pension and Other Postretirement Benefits (Tables)
 3 Months Ended
Mar. 31, 2022
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
Pension and other postretirement benefits expenses consisted of the following:
Three Months Ended
March 31,
Pensions20222021
Service cost$1,555 $1,741 
Interest cost3,434 3,172 
Expected return on plan assets(7,281)(6,972)
Amortization of prior service cost108 85 
Amortization of actuarial losses3,139 3,926 
Special termination benefits136 — 
Net periodic benefit cost$1,091 $1,952 

Three Months Ended
March 31,
Other Postretirement Benefits20222021
Service cost$24 $25 
Interest cost206 206 
Amortization of prior service cost— 7 
Amortization of actuarial losses9 70 
Net periodic benefit cost$239 $308