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Intangible Assets and Goodwill (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Components of intangible assets |  |  |
Total Proceeds From Sale Of Intangible Assets |  | $ 4,400 |
Gross Carrying Amount | $ 216,714 | 216,714 |
Accumulated Amortization | (152,448) | (127,343) |
Finite-lived intangible assets | 64,266 | 89,371 |
Amortization expense for intangible assets | $ 25,074 | $ 26,618 | $ 28,909
Minimum |  |  |
Components of intangible assets |  |  |
Useful Life (in years) | 1 year | 1 year |
Maximum |  |  |
Components of intangible assets |  |  |
Useful Life (in years) | 10 years | 10 years |
Existing technology |  |  |
Components of intangible assets |  |  |
Gross Carrying Amount | $ 185,321 | $ 185,321 |
Accumulated Amortization | (127,028) | (104,426) |
Finite-lived intangible assets | $ 58,293 | $ 80,895 |
Existing technology | Minimum |  |  |
Components of intangible assets |  |  |
Useful Life (in years) | 3 years | 3 years |
Existing technology | Maximum |  |  |
Components of intangible assets |  |  |
Useful Life (in years) | 10 years | 10 years |
Customer contracts and contractual relationships |  |  |
Components of intangible assets |  |  |
Gross Carrying Amount | $ 31,093 | $ 31,093 |
Accumulated Amortization | (25,120) | (22,617) |
Finite-lived intangible assets | $ 5,973 | $ 8,476 |
Customer contracts and contractual relationships | Minimum |  |  |
Components of intangible assets |  |  |
Useful Life (in years) | 1 year | 1 year |
Customer contracts and contractual relationships | Maximum |  |  |
Components of intangible assets |  |  |
Useful Life (in years) | 10 years | 10 years |
Non-competition agreements |  |  |
Components of intangible assets |  |  |
Gross Carrying Amount | $ 300 | $ 300 |
Accumulated Amortization | (300) | (300) |
Finite-lived intangible assets | $ 0 | $ 0 |
Useful Life (in years) | 3 years | 3 years |

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