Workers Compensation Expense (Tables)

3 Months Ended

Mar. 31, 2018

Compensation Related Costs [Abstract]

Workers' compensation expense

Workers’ compensation expense consists of the following components:

	Three Months Ended March 31,
	2018		2017
	(In thousands)
Self-insured occupational disease benefits:
Service cost	$	1,860	$	1,558
Interest cost(1)	1,195		1,169
Total occupational disease	$	3,055	$	2,727
Traumatic injury claims and assessments	3,011		2,878
Total workers’ compensation expense	$	6,066	$	5,605

(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.” For additional information about the adoption of the standard, see Note 2, “Accounting Policies” in the Condensed Consolidated Financial Statements.