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Intangible Assets Schedule of Intangible Assets (Tables)
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12 Months Ended |
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Dec. 31, 2014
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| Schedule of Intangible Assets [Abstract] |
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| Schedule of Finite-Lived Intangible Assets [Table Text Block] |
The gross carrying amount and accumulated amortization of our intangible assets, other than goodwill, are as follows:
| | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2014 | | December 31, 2013 | | Gross Assets | | Accumulated Amortization | | Net | | Gross Assets | | Accumulated Amortization | | Net | | (in thousands) | Core-developed technology | $ | 405,434 |
| | $ | (359,500 | ) | | $ | 45,934 |
| | $ | 428,890 |
| | $ | (356,017 | ) | | $ | 72,873 |
| Customer contracts and relationships | 262,930 |
| | (172,755 | ) | | 90,175 |
| | 291,185 |
| | (173,952 | ) | | 117,233 |
| Trademarks and trade names | 68,205 |
| | (64,905 | ) | | 3,300 |
| | 73,117 |
| | (67,449 | ) | | 5,668 |
| Other | 11,579 |
| | (11,079 | ) | | 500 |
| | 11,089 |
| | (11,023 | ) | | 66 |
| Total intangible assets subject to amortization | 748,148 |
| | (608,239 | ) | | 139,909 |
| | 804,281 |
| | (608,441 | ) | | 195,840 |
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| SummaryOfIntangibleAssetAccountActivity [Table Text Block] |
A summary of the intangible asset account activity is as follows:
| | | | | | | | | | Year Ended December 31, | | 2014 | | 2013 | | (in thousands) | Beginning balance, intangible assets, gross | $ | 804,281 |
| | $ | 802,540 |
| Intangible assets acquired | 1,453 |
| | (1,500 | ) | Effect of change in exchange rates | (57,586 | ) | | 3,241 |
| Ending balance, intangible assets, gross | $ | 748,148 |
| | $ | 804,281 |
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| Finite-lived Intangible Assets Amortization Expense [Table Text Block] |
A summary of intangible asset amortization expense is as follows: | | | | | | | | | | | | | Amortization expense | Year Ended December 31, | | 2014 | | 2013 | | 2012 | | (in thousands) | Amortization expense | $ | 43,704 |
| | $ | 42,019 |
| | $ | 47,810 |
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| Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] |
Estimated future annual amortization expense is as follows:
| | | | | | Years ending December 31, | | Estimated Annual Amortization | | | (in thousands) | 2015 | | $ | 33,562 |
| 2016 | | 26,522 |
| 2017 | | 19,485 |
| 2018 | | 13,571 |
| 2019 | | 10,501 |
| Beyond 2019 | | 36,268 |
| Total intangible assets subject to amortization | | $ | 139,909 |
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