Fair Value of Acquired Assets (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Mar. 31, 2013	Jun. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 56,425	$ 38,725
Accumulated Amortization	(19,216)	(13,642)
Net Carrying Amount	37,209	25,083
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,770	26,770
Accumulated Amortization	(12,915)	(9,217)
Net Carrying Amount	30,855	17,553
Weighted Average Useful Life	6 years 6 months	6 years 10 months 24 days
Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,500	800
Accumulated Amortization	(972)	(588)
Net Carrying Amount	528	212
Weighted Average Useful Life	1 year	2 years
Micronetics
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,500
Accumulated Amortization	(2,807)
Net Carrying Amount	15,693
Micronetics | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,000
Accumulated Amortization	(1,836)
Net Carrying Amount	15,164
Weighted Average Useful Life	6 years
Micronetics | Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,500
Accumulated Amortization	(971)
Net Carrying Amount	$ 529
Weighted Average Useful Life	1 year