Business Combinations - Allocation of Purchase Price to Identifiable Tangible and Acquisition of Intangible Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	1 Months Ended	12 Months Ended
	Jul. 13, 2012	Dec. 31, 2012
Business Acquisition [Line Items]
Intangible Assets ,Amount	$ 29,560
Intangible Assets Useful life		5 years 3 months 18 days
Current Technology [Member]
Business Acquisition [Line Items]
Intangible Assets ,Amount	6,260
Intangible Assets Useful life	5 years
Patent and Patent Rights [Member]
Business Acquisition [Line Items]
Intangible Assets ,Amount	4,580
Intangible Assets Useful life	7 years
Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible Assets ,Amount	$ 18,720
Minimum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible Assets Useful life	5 years
Maximum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Intangible Assets Useful life	9 years