Goodwill and Identified Intangible Assets - Identified Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013		Dec. 31, 2012
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Assets	$ 163,375		$ 210,044
Accumulated Amortization	(65,778)		(89,612)
Net	97,597		120,432
Intangible assets, net	2,099
Intellectual Property and Customer Contracts [Member]
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Intangible assets, net	2,100		2,100
Acquired Patents / Core Technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Assets	131,121	[1],[2]	137,728	[1],[2]
Accumulated Amortization	(42,091)	[1],[2]	(38,874)	[1],[2]
Net	89,030	[1],[2]	98,854	[1],[2]
Intangible asset impairment charge	400
Acquired Patents / Core Technology | Minimum
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	3 years	[1],[2]
Acquired Patents / Core Technology | Maximum
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	15 years	[1],[2]
Existing Technology
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Assets	21,734	[1],[3]	54,196	[1],[3]
Accumulated Amortization	(16,686)	[1],[3]	(38,562)	[1],[3]
Net	5,048	[1],[3]	15,634	[1],[3]
Intangible asset impairment charge	8,300
Existing Technology | Minimum
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	5 years	[1],[3]
Existing Technology | Maximum
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	10 years	[1],[3]
Customer Contracts
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Assets	10,000	[1]	12,800	[1]
Accumulated Amortization	(6,536)	[1]	(8,033)	[1]
Net	3,464	[1]	4,767	[1]
Customer Contracts | Minimum
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	3 years	[1]
Customer Contracts | Maximum
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	9 years	[1]
Trade Name
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Gross Assets	520	[1]	3,620	[1]
Accumulated Amortization	(465)	[1]	(2,443)	[1]
Net	55	[1]	1,177	[1]
Trade Name | Minimum
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	4 years	[1]
Trade Name | Maximum
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	10 years	[1]
Non-Competition Agreements
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	2 years
Gross Assets	0		1,400
Accumulated Amortization	0		(1,400)
Net	0		0
Assembled Workforce
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items]
Average Life (Years)	4 years
Gross Assets	0		300
Accumulated Amortization	0		(300)
Net	$ 0		$ 0

[1] The Company reclassified $2.1 million of patents, trade names, customer contracts and existing technology to discontinued operations as of June 30, 2013 and December 31, 2012, respectively. See Note 6 - "Discontinued Operations" of the Notes to Condensed Financial Statements for additional details.

[2] The Company recorded a $400,000 charge in the six months ended June 30, 2013 due to abandonment of acquired patents which caused a revision of the useful life estimate of these patent assets thus fully impairing them.

[3] The Company incurred an $8.3 million charge in the six months ended June 30, 2013 due to the abandonment of existing technology which caused a revision of the useful life estimate of these technology assets thus fully impairing them.