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Net Periodic Benefit Cost (Tables)
9 Months Ended
Sep. 30, 2021
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs [Table Text Block]
Net periodic pension cost for the Company’s defined benefit pension plans and U.S. post-retirement medical plan includes the following components for the three months ended September 30:
 U.S. Pension BenefitsNon-U.S. Pension BenefitsOther U.S. Post-retirement BenefitsTotal
 20212020202120202021202020212020
Service cost, net$374 $326 $4,858 $4,750 $— $— $5,232 $5,076 
Interest cost on projected benefit obligations
546 889 843 1,208 1,391 2,102 
Expected return on plan assets(1,494)(1,523)(8,851)(8,426)— — (10,345)(9,949)
Recognition of prior service cost
— — (462)(1,819)(18)(18)(480)(1,837)
Recognition of actuarial losses/(gains)
728 643 6,211 5,947 (10)(7)6,929 6,583 
Net periodic pension cost/(credit)
$154 $335 $2,599 $1,660 $(26)$(20)$2,727 $1,975 

Net periodic pension cost for the Company’s defined benefit pension plans and U.S. post-retirement medical plan includes the following components for the nine months ended September 30:
 U.S. Pension BenefitsNon-U.S. Pension BenefitsOther U.S. Post-retirement BenefitsTotal
 20212020202120202021202020212020
Service cost, net$1,122 $978 $14,710 $13,795 $— $— $15,832 $14,773 
Interest cost on projected benefit obligations
1,644 2,667 2,551 3,541 19 4,201 6,227 
Expected return on plan assets(4,482)(4,571)(26,726)(24,530)— — (31,208)(29,101)
Recognition of prior service cost— — (1,398)(5,279)(56)(56)(1,454)(5,335)
Recognition of actuarial losses/(gains)2,186 1,933 18,756 17,258 (28)(21)20,914 19,170 
Net periodic pension cost/(credit)$470 $1,007 $7,893 $4,785 $(78)$(58)$8,285 $5,734