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Employee Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2021
Retirement Benefits [Abstract]  
Summary of Accumulated Benefit Obligation in Excess of Plan Assets
Pretax amounts for net periodic benefit cost and other amounts for the defined benefit pension plans consisted of the following components:
Three months ended September 30,Nine months ended September 30,
20212021
Service cost$104 $318 
Interest cost16 
Return on plan assets(4)(11)
Net periodic pension cost105 323 
Total recognized in net periodic benefit cost$105 $323 
Defined benefit cost:
Expected long-term rate of return on plan assets0.50 %0.50 %