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Goodwill and Intangible Assets (Tables) | 12 Months Ended
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Dec. 31, 2015
Goodwill and Intangible Assets |
Schedule of changes in goodwill |
|  | Gross carrying |  | Accumulated |  |  |
|  |  |  | amount |  |  |  | impairment |  |  |  | Net amount |
|  | (in thousands) |
Balance at December 31, 2013 |  | $ | 186,589 |  | $ | 95,241 |  | $ | 91,348 |
Acquisition |  | 51,396 |  | — |  | 51,396 |
Purchase price adjustments |  | 173 |  | — |  | 173 |
Impairments |  | — |  | 27,958 |  | (27,958 | )
Balance at December 31, 2014 |  | 238,158 |  | 123,199 |  | 114,959 |
Purchase price adjustments |  | (51 | ) | — |  | (51 | )
Balance at December 31, 2015 |  | $ | 238,107 |  | $ | 123,199 |  | $ | 114,908 |
Schedule of intangible assets |
|  |  |  |  |  | December 31, 2015 |  |  |  | December 31, 2014 |
|  | Weighted |  |  |  |  |  |  |  | Accumulated |  |  |  |  |  |  |  |  |  |  |  | Accumulated |  |  |  |  |
|  | Average Remaining |  |  |  | Gross |  |  |  | Amortization |  |  |  |  |  |  |  | Gross |  |  |  | Amortization |  |  |  |  |
|  | Amortization |  |  |  | Carrying |  |  |  | and |  |  |  | Net |  |  |  | Carrying |  |  |  | and |  |  |  | Net |
|  | Period |  |  |  | Amount |  |  |  | Impairment |  |  |  | Amount |  |  |  | Amount |  |  |  | Impairment |  |  |  | Amount |
|  | (in years) |  | (in thousands) |
Technology |  | 8.7 |  | $ | 222,358 |  | $ | 120,496 |  | $ | 101,862 |  | $ | 222,358 |  | $ | 106,342 |  | $ | 116,016 |
Customer relationships |  | 12.9 |  | 47,885 |  | 22,470 |  | 25,415 |  | 69,350 |  | 35,549 |  | 33,801 |
Trademarks and tradenames |  | 5.3 |  | 2,730 |  | 1,937 |  | 793 |  | 3,050 |  | 1,096 |  | 1,954 |
Indefinite-lived trademark |  | — |  | 2,900 |  | — |  | 2,900 |  | 2,900 |  | — |  | 2,900 |
IPR&D |  | — |  | — |  | — |  | — |  | 5,070 |  | 5,070 |  | — |
Other |  | 1.8 |  | 6,241 |  | 5,537 |  | 704 |  | 5,485 |  | 848 |  | 4,637 |
Total |  | 9.4 |  | $ | 282,114 |  | $ | 150,440 |  | $ | 131,674 |  | $ | 308,213 |  | $ | 148,905 |  | $ | 159,308 |
Schedule of estimated aggregate amortization expense for intangible assets with definite useful lives |
|  |  |  | Amortization |
|  | (in thousands) |
2016 |  | $ | 20,816 |
2017 |  | 17,976 |
2018 |  | 16,399 |
2019 |  | 15,165 |
2020 |  | 14,112 |
Thereafter |  | 44,306 |
Total |  | $ | 128,774 |

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