Goodwill And Intangible Assets (Schedule Of Changes In Carrying Amount Of Goodwill) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		6 Months Ended		6 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011 Infrared Optics [Member]	Dec. 31, 2010 Infrared Optics [Member]	Dec. 31, 2011 Near-Infrared Optics [Member]	Dec. 31, 2010 Near-Infrared Optics [Member]	Dec. 31, 2011 Military & Materials [Member]	Jun. 30, 2011 Military & Materials [Member]	Dec. 31, 2010 Military & Materials [Member]	Dec. 31, 2011 Advanced Products Group [Member]	Jun. 30, 2011 Advanced Products Group [Member]	Dec. 31, 2010 Advanced Products Group [Member]
Goodwill [Line Items]
Balance - beginning of period	$ 64,262	$ 66,135	$ 10,038	$ 9,800	$ 33,511	$ 32,364	$ 10,399	$ 10,399	$ 13,657	$ 10,314	$ 10,314	$ 10,314
Goodwill acquired - Aegis	20,016				20,016
Foreign currency translation	507		(342)		849
Balance - end of period	$ 84,785	$ 66,135	$ 9,696	$ 9,800	$ 54,376	$ 32,364	$ 10,399	$ 10,399	$ 13,657	$ 10,314	$ 10,314	$ 10,314

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

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-Publisher FASB

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details