PROPERTY, PLANT AND EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2013

PROPERTY, PLANT AND EQUIPMENT

Schedule of Property, Plant and Equipment

Property, plant and equipment consist of the following at December 31, (in thousands):

	2013		2012
Mining equipment and processing facilities	$	1,583,329	$	1,434,674
Land and mineral rights	369,347		303,725
Buildings, office equipment and improvements	226,672		208,351
Construction and mine development in progress	194,221		162,331
Mine development costs	272,303		252,782
Property, plant and equipment, at cost	2,645,872		2,361,863
Less accumulated depreciation, depletion and amortization	(1,031,493)		(832,293)
Total property, plant and equipment, net	$	1,614,379	$	1,529,570