Fair Value of Acquired Assets (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2012	Jun. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 57,225	$ 38,725
Accumulated Amortization	(15,430)	(13,642)
Net Carrying Amount	41,795	25,083
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,770	26,770
Accumulated Amortization	(10,186)	(9,217)
Net Carrying Amount	33,584	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	2,300	800
Accumulated Amortization	(910)	(588)
Net Carrying Amount	1,390	212
Weighted Average Useful Life	1 year 2 months 12 days	2 years
Micronetics
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,500
Accumulated Amortization	(641)
Net Carrying Amount	17,859
Micronetics | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,000
Accumulated Amortization	(419)
Net Carrying Amount	16,581
Weighted Average Useful Life	6 years
Micronetics | Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,500
Accumulated Amortization	(222)
Net Carrying Amount	$ 1,278
Weighted Average Useful Life	1 year