INTANGIBLE ASSETS, NET (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Intangible assets, net
Total intangible assets, net	$ 20,594,000	$ 17,603,000
Estimated future amortization
2012	9,010,000
2013	2,982,000
2014	1,424,000
2015	1,156,000
2016	914,000
Thereafter	5,108,000
Total future amortization	20,594,000
Core/licensed technology
Intangible assets, net
Intangible assets, gross	17,564,000	17,564,000
Accumulated Amortization	(12,420,000)	(8,908,000)
Total intangible assets, net	5,144,000	8,656,000
Amortization expense	3,500,000	5,200,000	5,100,000
Estimated future amortization
2012	3,513,000
2013	1,097,000
2014	292,000
2015	242,000
Total future amortization	5,144,000
Acquisition-related intangible assets
Intangible assets, net
Intangible assets, gross	32,250,000	21,180,000
Accumulated Amortization	(16,800,000)	(12,233,000)
Total intangible assets, net	15,450,000	8,947,000
Amortization expense	4,600,000	4,500,000	4,900,000
Estimated future amortization
2012	5,497,000
2013	1,885,000
2014	1,132,000
2015	914,000
2016	914,000
Thereafter	5,108,000
Total future amortization	$ 15,450,000