SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Purchased intangible assets
Weighted average amortization period	12 years
Gross	$ 69,237	$ 62,567
Accumulated Amortization	(27,279)	(20,513)
Net	41,958	42,054
Expected future amortization of intangible assets
2013	6,341
2014	6,133
2015	4,681
2016	4,681
2017	4,658
Thereafter	15,464
Net	41,958	42,054
Core technology
Purchased intangible assets
Weighted average amortization period	20 years
Gross	22,494	22,041
Accumulated Amortization	(5,749)	(4,525)
Net	16,745	17,516
Expected future amortization of intangible assets
Net	16,745	17,516
Customer relationships
Purchased intangible assets
Weighted average amortization period	9 years
Gross	44,334	38,165
Accumulated Amortization	(20,046)	(14,720)
Net	24,288	23,445
Expected future amortization of intangible assets
Net	24,288	23,445
Trademarks/ Trade names
Purchased intangible assets
Weighted average amortization period	9 years
Gross	2,409	2,361
Accumulated Amortization	(1,484)	(1,268)
Net	925	1,093
Expected future amortization of intangible assets
Net	$ 925	$ 1,093