Acquisitions (Narrative) (Detail) (USD $)	12 Months Ended
	Jun. 30, 2012	Jul. 31, 2011	Jun. 30, 2011
Business Acquisition [Line Items]
Net assets acquired		$ 46,141,000
Goodwill		16,193,000
Deferred income taxes		11,185,000
Aegis Lightwave, Inc. [Member]
Business Acquisition [Line Items]
Net assets acquired		46,100,000
Cash acquired		8,400,000	8,400,000
Goodwill		16,200
Deferred income taxes		11,200
Revenues	17,300,000
Net Losses	2,200,000
Transaction costs			$ 900,000