PURCHASED INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Purchased intangible assets
Gross	$ 66,298	$ 62,567
Accumulated Amortization	(22,929)	(20,513)
Net	43,369	42,054
Core technology
Purchased intangible assets
Gross	21,414	22,041
Accumulated Amortization	(4,935)	(4,525)
Net	16,479	17,516
Customer relationships
Purchased intangible assets
Gross	42,591	38,165
Accumulated Amortization	(16,672)	(14,720)
Net	25,919	23,445
Trademarks/ Trade names
Purchased intangible assets
Gross	2,293	2,361
Accumulated Amortization	(1,322)	(1,268)
Net	$ 971	$ 1,093