|
Intangible Assets Gross Carrying Amount and Accumulated Amortization (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2013
|
Dec. 31, 2012
|
Mar. 31, 2012
|
Dec. 31, 2011
|
|---|---|---|---|---|
| Intangible Assets [Line Items] | ||||
| Gross Assets | $ 781,916 | $ 802,540 | $ 765,712 | $ 749,194 |
| Accumulated Amortization | (560,769) | (563,769) | ||
| Net | 221,147 | 238,771 | ||
|
Core-developed technology [Member]
|
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| Intangible Assets [Line Items] | ||||
| Gross Assets | 418,123 | 407,024 | ||
| Accumulated Amortization | (331,603) | (332,763) | ||
| Net | 86,520 | 74,261 | ||
|
Customer contracts and relationships [Member]
|
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| Intangible Assets [Line Items] | ||||
| Gross Assets | 281,697 | 292,252 | ||
| Accumulated Amortization | (154,042) | (154,890) | ||
| Net | 127,655 | 137,362 | ||
|
Trademarks and trade names [Member]
|
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| Intangible Assets [Line Items] | ||||
| Gross Assets | 71,004 | 72,770 | ||
| Accumulated Amortization | (64,100) | (65,090) | ||
| Net | 6,904 | 7,680 | ||
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Other [Member]
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| Intangible Assets [Line Items] | ||||
| Gross Assets | 11,092 | 11,094 | ||
| Accumulated Amortization | (11,024) | (11,026) | ||
| Net | 68 | 68 | ||
|
In-process research and development
|
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| Intangible Assets [Line Items] | ||||
| Indefinite-lived Intangible Assets | 0 | 19,400 | ||
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Intangible Asset Subject to Amortization [Member]
|
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| Intangible Assets [Line Items] | ||||
| Gross Assets | 781,916 | 783,140 | ||
| Accumulated Amortization | (560,769) | (563,769) | ||
| Net | $ 221,147 | $ 219,371 |