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=26713463&loc=d3e16323-109275

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- Definition

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

+ References

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

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Intangible Assets Gross Carrying Amount and Accumulated Amortization (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Intangible Assets [Line Items]
Gross Assets	$ 705,613	$ 748,148	$ 802,208	$ 804,281
Accumulated Amortization	(583,182)	(608,239)
Net	122,431us-gaap_FiniteLivedIntangibleAssetsNet	139,909us-gaap_FiniteLivedIntangibleAssetsNet
Core-developed technology [Member]
Intangible Assets [Line Items]
Gross Assets	387,286	405,434
Accumulated Amortization	(347,529)	(359,500)
Net	39,757	45,934
Customer contracts and relationships [Member]
Intangible Assets [Line Items]
Gross Assets	242,624	262,930
Accumulated Amortization	(162,637)	(172,755)
Net	79,987	90,175
Trademarks and trade names [Member]
Intangible Assets [Line Items]
Gross Assets	64,624	68,205
Accumulated Amortization	(61,994)	(64,905)
Net	2,630	3,300
Other [Member]
Intangible Assets [Line Items]
Gross Assets	11,079	11,579
Accumulated Amortization	(11,022)	(11,079)
Net	$ 57	$ 500