Acquisitions (Narrative) (Detail)			1 Months Ended						1 Months Ended
	Jun. 30, 2012 USD ($)	Jul. 22, 2011 USD ($)	Jul. 22, 2011 MWM Acoustics [Member] USD ($) D	Dec. 31, 2012 MWM Acoustics [Member] USD ($)	Dec. 31, 2012 Interchain Solution Private Limited [Member] USD ($)	Oct. 13, 2012 Interchain Solution Private Limited [Member] USD ($)	Jul. 31, 2012 Interchain Solution Private Limited [Member] USD ($)	Jul. 31, 2012 Interchain Solution Private Limited [Member] INR	Jul. 22, 2011 Customer Relationships [Member] USD ($)	Jul. 22, 2011 Technology [Member] USD ($)
Business Acquisition [Line Items]
Purchase price			$ 80,000,000				$ 800,000	45,000,000
Cash paid on acquisition			72,000,000			500,000	300,000
Acquisition earn-out contingent payable			57,000,000				900,000	50,000,000
Financial targets achievement period end			June 30, 2014				September 1, 2013 and September 2, 2014	September 1, 2013 and September 2, 2014
Contingent consideration related to earn-out					300,000
Goodwill		79,757,000					600,000
Acquired intangible assets		20,600,000					400,000		19,200,000	1,400,000
Accrued working capital adjustments			100,000
Number of days for working capital adjustment			60
Remainder of Fixed Purchase Price payable in future				8,000,000
Preliminary valuation of contingent consideration			22,100,000	9,600,000
Approximate goodwill amount deductible for tax purposes		35,600,000
Approximate useful life									10 years	4 years
Acquisition costs incurred	$ 900,000