POSTRETIREMENT MEDICAL BENEFITS AND PENSION (Tables)

3 Months Ended

Mar. 31, 2014

Postretirement Medical Benefits

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Components of net periodic benefit cost

The components of net periodic postretirement medical benefit cost are as follows:

	Three Months Ended March 31,
	2014		2013
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	822	$	1,109
Interest cost	3,203		3,035
Amortization of deferred items	5		1,001
Total net periodic benefit cost	$	4,030	$	5,145

The following table shows the net periodic postretirement medical benefit costs that relate to current and former mining operations:

	Three Months Ended March 31,
	2014		2013
	(In thousands)
Former mining operations	$	2,403	$	3,119
Current operations	1,627		2,026
Total net periodic benefit cost	$	4,030	$	5,145

Pension

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Components of net periodic benefit cost

The Company incurred net periodic benefit costs of providing these pension benefits as follows:

	Three Months Ended March 31,
	2014			2013
	(In thousands)
Components of net periodic benefit cost:
Service cost	$	500		$	534
Interest cost	1,747			1,625
Expected return on plan assets	(2,154		)	(2,060		)
Amortization of deferred items	359			741
Total net periodic pension cost	$	452		$	840