POSTRETIREMENT MEDICAL BENEFITS AND PENSION (Tables)

6 Months Ended

Jun. 30, 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 June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
	(In thousands)				(In thousands)
Components of net periodic benefit cost:
Service cost	$	822	$	1,109	$	1,645	$	2,218
Interest cost	3,203		3,035		6,407		6,069
Amortization of deferred items	4		1,001		9		2,003
Total net periodic benefit cost	$	4,029	$	5,145	$	8,061	$	10,290

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

	Three Months Ended June 30,				Six Months Ended June 30,
	2014		2013		2014		2013
	(In thousands)				(In thousands)
Former mining operations	$	2,402	$	3,119	$	4,807	$	6,237
Current operations	1,627		2,026		3,254		4,053
Total net periodic benefit cost	$	4,029	$	5,145	$	8,061	$	10,290

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 June 30,						Six Months Ended June 30,
	2014			2013			2014			2013
	(In thousands)						(In thousands)
Components of net periodic benefit cost:
Service cost	$	500		$	638		$	1,000		$	1,173
Interest cost	1,638			1,555			3,384			3,180
Expected return on plan assets	(2,154		)	(2,325		)	(4,307		)	(4,385		)
Amortization of deferred items	359			1,004			719			1,745
Total net periodic pension cost	$	343		$	872		$	796		$	1,713