PURCHASED INTANGIBLE ASSETS (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Purchased intangible assets
Gross	$ 67,506	$ 69,237
Accumulated Amortization	(28,078)	(27,279)
Net	39,428	41,958
Core technology
Purchased intangible assets
Gross	21,819	22,494
Accumulated Amortization	(5,851)	(5,749)
Net	15,968	16,745
Customer relationships
Purchased intangible assets
Gross	43,351	44,334
Accumulated Amortization	(20,742)	(20,046)
Net	22,609	24,288
Trademarks / Trade names
Purchased intangible assets
Gross	2,336	2,409
Accumulated Amortization	(1,485)	(1,484)
Net	$ 851	$ 925

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Name:	us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant