Intangible Assets Gross Carrying Amount and Accumulated Amortization (Details) (USD $) In Thousands | Sep. 30, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Dec. 31, 2009 |
|---|---|---|---|---|
| Finite-Lived Intangible Assets [Line Items] | ||||
| Gross Assets | $ 773,262 | $ 759,152 | $ 772,526 | $ 806,256 |
| Accumulated Amortization | (509,039) | (467,482) | ||
| Net | 264,223 | 291,670 | ||
Core Developed Technology [Member] | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Gross Assets | 394,990 | 378,705 | ||
| Accumulated Amortization | (303,634) | (274,198) | ||
| Net | 91,356 | 104,507 | ||
Customer Contracts And Relationships [Member] | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Gross Assets | 292,479 | 282,997 | ||
| Accumulated Amortization | (131,370) | (110,539) | ||
| Net | 161,109 | 172,458 | ||
Trade Marks And Trade Names [Member] | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Gross Assets | 74,701 | 73,194 | ||
| Accumulated Amortization | (63,361) | (59,235) | ||
| Net | 11,340 | 13,959 | ||
Other Intangible Assets [Member] | ||||
| Finite-Lived Intangible Assets [Line Items] | ||||
| Gross Assets | 11,092 | 24,256 | ||
| Accumulated Amortization | (10,674) | (23,510) | ||
| Net | $ 418 | $ 746 |