Amortization Expense of Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization	$ 12,550	$ 5,815	$ 7,366
Cost of Sales
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization	5,280	3,165	3,851
Operating Expense
Finite Lived Intangible Assets Amortization Expense [Line Items]
Amortization	$ 7,270	$ 2,650	$ 3,515