Goodwill and Amortizable Intangible Assets - Net Consolidated Balance of Amortizable Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified			6 Months Ended		6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Customer Relationships [Member]	Jun. 30, 2014 Acquired Technology [Member]	Jun. 30, 2014 Non-compete Agreements [Member]	Jun. 30, 2014 Trademarks [Member]	Jun. 30, 2014 Minimum [Member]	Jun. 30, 2014 Minimum [Member] Acquired Technology [Member]	Jun. 30, 2014 Maximum [Member]	Jun. 30, 2014 Maximum [Member] Acquired Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Total amortizable intangible assets	$ 22,653	$ 25,368	$ 16,668	$ 1,649	$ 183	$ 4,153
Amortizable intangible assets, Accumulated Amortization	(18,873)		(8,334)	(6,803)	(2,187)	(1,549)
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	3 years	2 years	2 years	10 years	4 years