Acquisitions (Narrative) (Details) (USD $)	6 Months Ended		3 Months Ended	6 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Aegis Lightwave, Inc. [Member]	Dec. 31, 2011 Aegis Lightwave, Inc. [Member]	Jul. 31, 2011 Aegis Lightwave, Inc. [Member]	Dec. 31, 2010 Max Levy Autograph, Inc. [Member]
Business Acquisition [Line Items]
Purchase of business	$ 46,141,000	$ 12,813,000
Cash acquired					8,400,000
Goodwill			20,016,000	20,016,000		6,485,000
Fair value of accounts receivable acquired			4,600,000	4,600,000
Revenues			3,000,000	7,800,000
Net losses			1,400,000	1,700,000
Transaction costs attributable to acquisition			$ 900,000	$ 900,000