Goodwill Goodwill - Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Goodwill [Roll Forward]
Beginning Balance	$ 168,146
Goodwill adjustments		$ 0
Ending Balance	344,027	168,146
MCE
Goodwill [Roll Forward]
Beginning Balance	134,378
Goodwill adjustments	0	0
Ending Balance	134,378	134,378
MDS
Goodwill [Roll Forward]
Beginning Balance	33,768
Goodwill adjustments		0
Ending Balance	39,406	33,768
Carve-Out Business [Member]
Goodwill [Roll Forward]
Beginning Balance	0	0
Goodwill adjustments		0
Ending Balance	170,243	0
Lewis Innovative Technologies [Member]
Goodwill [Roll Forward]
Goodwill adjustments	5,638
Lewis Innovative Technologies [Member] | MDS
Goodwill [Roll Forward]
Goodwill adjustments	5,638
Micronetics
Goodwill [Roll Forward]
Beginning Balance		168,146
Micronetics | MCE
Goodwill [Roll Forward]
Beginning Balance		134,378
Micronetics | MDS
Goodwill [Roll Forward]
Beginning Balance		$ 33,768
Carve-Out Business [Member]
Goodwill [Roll Forward]
Goodwill adjustments	170,243
Carve-Out Business [Member] | Carve-Out Business [Member]
Goodwill [Roll Forward]
Goodwill adjustments	$ 170,243