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Employee Benefit Plans (Tables)
3 Months Ended
Mar. 31, 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 March 31,
2021
Service cost$103 
Interest cost
Return on plan assets(4)
Net periodic pension cost104 
Total recognized in net periodic benefit cost$104 
Defined benefit cost:
Expected long-term rate of return on plan assets0.50 %