v2.3.0.15

PROPERTY, PLANT, AND EQUIPMENT AND MINERAL PROPERTIES (Tables)

9 Months Ended

Sep. 30, 2011

PROPERTY, PLANT, AND EQUIPMENT AND MINERAL PROPERTIES

Components of property, plant, and equipment and mineral properties and development costs

		September 30, 2011			December 31, 2010
Buildings and plant		$	65,020		$	55,462
Machinery and equipment			226,893			190,662
Vehicles			8,699			8,015
Office equipment and improvements			13,711			13,333
Ponds and land improvements			7,871			6,802
Construction in progress			126,651			77,998
Land			263			263
Accumulated depreciation			(89,790	)		(66,615	)
		$	359,318		$	285,920
Mineral properties and development costs		$	42,065		$	42,288
Construction in progress			694			515
Accumulated depletion			(9,435	)		(8,431	)
		$	33,324		$	34,372

Schedule of costs for depreciation, depletion, amortization, and accretion, including amounts capitalized into inventory

			Three months ended						Nine months ended
			September 30, 2011			September 30, 2010			September 30, 2011			September 30, 2010
Depreciation			$	8,403		$	6,417		$	24,358		$	18,495
Depletion				232			212			1,027			897
Amortization				—			55			92			166
Accretion				184			176			566			528
	Total		$	8,819		$	6,860		$	26,043		$	20,086

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