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Amortizable Intangible Assets and Goodwill (Details) (USD $) | 3 Months Ended | 9 Months Ended |  | 3 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | Dec. 31, 2010 | Sep. 30, 2011 Semiconductor Business Group ("SBG") Patents | Sep. 30, 2011 Patents year | Dec. 31, 2010 Patents year | Sep. 30, 2011 Customer contracts and contractual relationships year | Dec. 31, 2010 Customer contracts and contractual relationships year | Sep. 30, 2011 Existing technology year | Dec. 31, 2010 Existing technology year | Sep. 30, 2011 Intellectual property year | Dec. 31, 2010 Intellectual property year | Sep. 30, 2011 Non-competition agreements year | Dec. 31, 2010 Non-competition agreements year
Components of intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gross Carrying Amount | $ 231,327,000 |  | $ 231,327,000 |  | $ 68,917,000 |  | $ 27,643,000 | $ 24,433,000 | $ 33,550,000 | $ 4,050,000 | $ 159,350,000 | $ 29,950,000 | $ 10,384,000 | $ 10,384,000 | $ 400,000 | $ 100,000
Accumulated Amortization | (41,964,000) |  | (41,964,000) |  | (27,931,000) |  | (12,042,000) | (9,361,000) | (5,327,000) | (3,127,000) | (14,078,000) | (4,959,000) | (10,384,000) | (10,384,000) | (133,000) | (100,000)
Net Carrying Amount | 189,363,000 |  | 189,363,000 |  | 40,986,000 |  | 15,601,000 | 15,072,000 | 28,223,000 | 923,000 | 145,272,000 | 24,991,000 |  |  | 267,000 |
Minimum useful life (in years) |  |  |  |  |  |  | 3 | 3 | 1 | 1 | 3 | 3 |  |  |  |
Maximum useful life (in years) |  |  |  |  |  |  | 10 | 10 | 10 | 10 | 7 | 7 |  |  |  |
Useful life (in years) |  |  |  |  |  |  |  |  |  |  |  |  | 4 | 4 | 3 | 3
Amortization expense for intangible assets | 6,900,000 | 1,300,000 | 12,900,000 | 3,600,000 |  |  |  |  |  |  |  |  |  |  |  |
Fair value of acquired intagible assets |  |  |  |  |  | 3,200,000 |  |  |  |  |  |  |  |  |  |
Estimated future amortization expense of intangible assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2011 (remaining 3 months) |  |  | 8,384,000 |  |  |  |  |  |  |  |  |  |  |  |  |
2012 |  |  | 35,167,000 |  |  |  |  |  |  |  |  |  |  |  |  |
2013 |  |  | 32,101,000 |  |  |  |  |  |  |  |  |  |  |  |  |
2014 |  |  | 27,960,000 |  |  |  |  |  |  |  |  |  |  |  |  |
2015 |  |  | 27,309,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Thereafter |  |  | 58,442,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Total |  |  | $ 189,363,000 |  |  |  |  |  |  |  |  |  |  |  |  |

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