Property Plant and Equipment (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Jun. 30, 2012
Property, Plant and Equipment [Line Items]
Land and land improvements	$ 2,236	$ 2,236
Buildings and improvements	81,984	78,149
Machinery and equipment	271,018	228,564
Construction in progress	14,501	17,614
Property, Plant and Equipment, gross	369,739	326,563
Less accumulated depreciation	(196,533)	(172,645)
Property, Plant and Equipment, net	$ 173,206	$ 153,918