Goodwill and Other Intangible Asset Data - Amortized 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 [Line Items]
Gross Amount	$ 106,240	$ 69,040
Accumulated Amortization	(37,272)	(29,889)
Net Amount	68,968	39,151
Amortization expense	7,383	4,673	3,320
Current Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	23,778	18,978
Accumulated Amortization	(14,060)	(12,391)
Net Amount	9,718	6,587
Patents and Patent Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	29,569	29,569
Accumulated Amortization	(17,919)	(14,618)
Net Amount	11,650	14,951
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Amount	52,893	20,493
Accumulated Amortization	(5,293)	(2,880)
Net Amount	$ 47,600	$ 17,613