Fair Value of Acquired Assets (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Dec. 31, 2012	Jun. 30, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 57,225	$ 38,725
Accumulated Amortization	(17,660)	(13,642)
Net Carrying Amount	39,565	25,083
Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	43,770	26,770
Accumulated Amortization	(11,444)	(9,217)
Net Carrying Amount	32,326	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	(1,385)	(588)
Net Carrying Amount	915	212
Weighted Average Useful Life	1 year 3 months 18 days	2 years
Micronetics
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,500
Accumulated Amortization	(1,724)
Net Carrying Amount	16,776
Micronetics | Customer Relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,000
Accumulated Amortization	(1,127)
Net Carrying Amount	15,873
Weighted Average Useful Life	6 years
Micronetics | Backlog
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,500
Accumulated Amortization	(597)
Net Carrying Amount	$ 903
Weighted Average Useful Life	1 year