Workers Compensation Expense (Tables)

3 Months Ended

Mar. 31, 2020

Workers Compensation Expense

Workers' compensation expense

	Three Months Ended March 31,
	2020		2019
Self-insured occupational disease benefits:
Service cost	$	1,891	$	1,669
Interest cost(1)		1,399		1,354
Net amortization(1)		297		—
Total occupational disease	$	3,587	$	3,023
Traumatic injury claims and assessments		2,182		2,144
Total workers’ compensation expense	$	5,769	$	5,167

(1) In accordance with the adoption of ASU 2017-07, “Compensation-Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” these costs are recorded within Nonoperating expenses in the Condensed Consolidated Income Statements on the line item “Non-service related pension and postretirement benefit costs.”