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Retirement Plans (Tables)
 9 Months Ended
Sep. 30, 2022
Defined Benefit Plan Disclosure  
Schedule of Costs of Retirement Plans The following table summarizes the expense associated with the contributions made to these plans for the periods presented:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
United States$441 $400 $1,136 $1,172 
Canada83 33 143 119 
United Kingdom588 131 588 386 
$1,112 $564 $1,867 $1,677 
United States  
Defined Benefit Plan Disclosure  
Schedule of Net Benefit Costs
Net periodic pension costs for the United States defined benefit pension plan for the three and nine months ended September 30, 2022 and 2021 were as follows:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
Interest cost$49 $43 $146 $129 
Expected return on plan assets(66)(62)(198)(185)
Recognized net actuarial loss18 25 53 74 
Net periodic pension cost$1 $6 $1 $18 
United Kingdom  
Defined Benefit Plan Disclosure  
Schedule of Net Benefit Costs
Net periodic pension costs for the United Kingdom defined benefit pension plan for the three and nine months ended September 30, 2022 and 2021 were as follows:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2022202120222021
Interest cost$42 $28 $126 $84 
Expected return on plan assets(74)(65)(222)(195)
Amortization of prior service costs and transition amount6 7 18 21 
Recognized net actuarial loss38 83 114 249 
Net periodic pension cost$12 $53 $36 $159