Business Combination, Textuals (Details) (USD $)	12 Months Ended								12 Months Ended			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Business Acquisitions 2011 [Member]	Dec. 31, 2011 Business Acquisitions 2010 [Member]	Dec. 31, 2010 Business Acquisitions 2010 [Member]	Mar. 31, 2011 Business Acquisition Acquired Entity OpNext [Member]	Mar. 31, 2011 Business Acquisition Acquired Entity Brilliant [Member]	Dec. 31, 2010 Business Acquisition Acquired Entity Ankeena [Member]	Jun. 30, 2010 Business Acquisition Acquired Entity Ankeena [Member]	Sep. 30, 2010 Business Acquisition Acquired Entity SMobile [Member]	Dec. 31, 2010 Business Acquisition Acquired Entity Altor [Member]	Jun. 30, 2010 Business Acquisition Acquired Entity Altor [Member]	Dec. 31, 2010 Business Acquisition Acquired Entity Trapeze [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired										100.00%	100.00%	100.00%		100.00%
Business Acquisition, Cost of Acquired Entity, Purchase Price		$ 394,500,000					$ 26,000,000	$ 4,500,000		$ 68,900,000	$ 69,500,000	$ 104,000,000		$ 152,100,000
Business Acquisition, Purchase Price Allocation, Assets Acquired (Liabilities Assumed), Net							25,700,000	4,400,000		3,600,000	(5,200,000)	4,500,000		5,900,000
Business Acquisition, Purchase Price Allocation, Current Assets, Cash and Cash Equivalents										2,300,000	400,000	6,400,000		800,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount				400,000		269,200,000	300,000	100,000		53,100,000	48,100,000	78,200,000		89,800,000
Equity Method Investments										2,000,000			2,000,000
Percentage Ownership Interest In Equity Investment Prior To Acquisition									0.077			0.050
Equity Interest in Acquiree Prior to Acquisition, Fair Value										5,200,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value												4,100,000
Pro Forma results of operations not presented, impact to results of operations not material	0
Goodwill deductible for income tax purposes				0	88,900,000
Acquisition-related costs within operating expenses and cost of revenues	9,600,000	6,300,000	0
Gain (Loss) on Investments	$ (326,000)	$ 8,653,000	$ (5,562,000)