PURCHASED INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Purchased intangible assets
Gross	$ 67,690	$ 62,567
Accumulated Amortization	(24,989)	(20,513)
Net	42,701	42,054
Core technology
Purchased intangible assets
Gross	21,897	22,041
Accumulated Amortization	(5,321)	(4,525)
Net	16,576	17,516
Customer relationships
Purchased intangible assets
Gross	43,450	38,165
Accumulated Amortization	(18,271)	(14,720)
Net	25,179	23,445
Trademarks/ Trade names
Purchased intangible assets
Gross	2,343	2,361
Accumulated Amortization	(1,397)	(1,268)
Net	$ 946	$ 1,093