Workers' Compensation Expense (Tables)

6 Months Ended

Jun. 30, 2012

Workers' Compensation Expense [Abstract]

Workers' Compensation Expense

		Three Months Ended June 30,				Six Months Ended June 30,
		2012		2011		2012		2011
		(In thousands)
Service cost	$	71	$	246	$	1,039	$	439
Interest cost		399		304		1,079		558
Net amortization		(851)		(160)		(574)		(261)
Curtailments		1,933		-		1,933		-
Total occupational disease		1,552		390		3,477		736
Traumatic injury claims and assessments		6,423		3,324		11,599		5,649
Total workers’ compensation expense	$	7,975	$	3,714	$	15,076	$	6,385