Property, Plant, and Equipment (Tables)

3 Months Ended

Sep. 30, 2013

Property, Plant, and Equipment [Abstract]

Schedule of Property, Plant, and Equipment, Net of Accumulated Depreciation and Amortization

Property, plant, and equipment, net, is comprised of the following:

			September 30,	June 30,
			2013	2013
Land, land improvements, and land use rights		$	9,125	9,085
Building and improvements			88,234	87,486
Machinery and equipment			200,839	196,915
Furnaces			204,059	202,444
Mineral reserves			55,843	55,843
Mine development			4,863	4,863
Other			11,842	11,279
Construction in progress			7,011	6,786
	Property, plant, and equipment, gross		581,816	574,701
Less accumulated depreciation, depletion and amortization			(163,742)	(152,254)
	Property, plant, and equipment, net	$	418,074	422,447