Workers' Compensation Expense

3 Months Ended

Mar. 31, 2013

Workers' Compensation Expense [Abstract]

Workers' Compensation Expense

Workers’ Compensation Expense

The following table details the components of workers’ compensation expense:

	Three Months Ended March 31,
	2013		2012
	(In thousands)
Service cost	$	505	$	968
Interest cost	656		680
Net amortization	235		277
Total occupational disease	1,396		1,925
Traumatic injury claims and assessments	7,358		5,176
Total workers’ compensation expense	$	8,754	$	7,101