Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012
Property, Plant and Equipment [Line Items]
Land and land improvements	$ 2,236	$ 2,236
Buildings and improvements	79,909	78,149
Machinery and equipment	236,139	228,564
Construction in progress	12,983	17,614
Property, Plant and Equipment, gross	331,267	326,563
Less accumulated depreciation	(179,505)	(172,645)
Property, Plant and Equipment, net	$ 151,762	$ 153,918