Identified Intangible Assets and Goodwill - Amortization Expense and Weighted-Average Lives of Identified Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Amortization Expense and Weighted-Average Lives of Identified Intangible Assets [Line Items]
Weighted-Average Lives	48 months
Amortization Expense	$ 120,071	$ 115,935	$ 151,212
Current technology [Member]
Schedule of Amortization Expense and Weighted-Average Lives of Identified Intangible Assets [Line Items]
Weighted-Average Lives	52 months
Amortization Expense	48,736	49,243	77,808
Customer Base [Member]
Schedule of Amortization Expense and Weighted-Average Lives of Identified Intangible Assets [Line Items]
Weighted-Average Lives	47 months
Amortization Expense	35,316	33,921	36,440
Patent licensing [Member]
Schedule of Amortization Expense and Weighted-Average Lives of Identified Intangible Assets [Line Items]
Weighted-Average Lives	36 months
Amortization Expense	30,618	32,125	36,220
Order Backlog [Member]
Schedule of Amortization Expense and Weighted-Average Lives of Identified Intangible Assets [Line Items]
Weighted-Average Lives	3 months
Amortization Expense	4,500
Trade names [Member]
Schedule of Amortization Expense and Weighted-Average Lives of Identified Intangible Assets [Line Items]
Weighted-Average Lives	55 months
Amortization Expense	380	50	148
Workforce [Member]
Schedule of Amortization Expense and Weighted-Average Lives of Identified Intangible Assets [Line Items]
Weighted-Average Lives	72 months
Amortization Expense	$ 521	$ 596	$ 596