Goodwill and Amortizable Intangible Assets - Net Consolidated Balance of Amortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified			3 Months Ended		3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014 Customer Relationships [Member]	Mar. 31, 2014 Acquired Technology [Member]	Mar. 31, 2014 Non-compete Agreements [Member]	Mar. 31, 2014 Trademarks [Member]	Mar. 31, 2014 Minimum [Member]	Mar. 31, 2014 Minimum [Member] Acquired Technology [Member]	Mar. 31, 2014 Maximum [Member]	Mar. 31, 2014 Maximum [Member] Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Total amortizable intangible assets	$ 24,151	$ 25,368	$ 17,293	$ 2,118	$ 210	$ 4,530
Amortizable intangible assets, Accumulated Amortization	(17,375)		(7,709)	(6,334)	(2,160)	(1,172)
Amortizable intangible assets, Gross Carrying Amount	$ 41,526		$ 25,002	$ 8,452	$ 2,370	$ 5,702
Amortizable intangible assets, Useful Life			10 years		5 years	15 years	2 years	2 years	15 years	4 years