Changes in Carrying Amount of Goodwill (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			3 Months Ended
Sep. 30, 2013	Sep. 30, 2013 Infrared Optics	Sep. 30, 2013 Near-Infrared Optics	Sep. 30, 2013 Military & Materials	Jun. 30, 2013 Military & Materials	Sep. 30, 2013 Advanced Products Group	Sep. 30, 2013 Active Optical Products
Goodwill [Line Items]
Balance - beginning of period	$ 123,352	$ 9,677	$ 60,269	$ 30,712	$ 30,712	$ 22,694
Goodwill acquired	38,994						39,041
Goodwill adjustment	(516)					(516)
Foreign currency translation	221	56	165				(47)
Balance - end of period	$ 162,051	$ 9,733	$ 60,434	$ 30,712	$ 30,712	$ 22,178	$ 38,994

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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