Goodwill and Other Intangible Assets - Schedule Of Gross Carrying Amount and Accumulated Amortization (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Jun. 30, 2012
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 62,266	$ 62,213
Accumulated Amortization	(19,296)	(18,199)
Net Book Value	42,970	44,014
Patents [Member]
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	21,854	21,856
Accumulated Amortization	(8,078)	(7,640)
Net Book Value	13,776	14,216
Trademarks [Member]
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	13,166	13,166
Accumulated Amortization	(907)	(888)
Net Book Value	12,259	12,278
Customer Lists [Member]
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	25,868	25,816
Accumulated Amortization	(8,933)	(8,296)
Net Book Value	16,935	17,520
Other [Member]
Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	1,378	1,375
Accumulated Amortization	$ (1,378)	$ (1,375)