Property, Plant, and Equipment (Tables)

3 Months Ended

Sep. 30, 2012

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,
			2012	2012
Land, land improvements, and land use rights		$	10,561	10,831
Building and improvements			76,992	76,395
Machinery and equipment			180,182	175,305
Furnaces			195,245	193,055
Mineral reserves			55,843	55,843
Mine development			4,512	4,058
Other			4,916	4,852
Construction in progress			27,215	23,616
	Property, plant, and equipment, gross		555,466	543,955
Less accumulated depreciation, depletion and amortization			(122,570)	(111,194)
	Property, plant, and equipment, net	$	432,896	432,761