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Stock-Based Compensation and Employee Benefit Plans - Stock-Based Compensation (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Stock based compensation | $ 3,685 | $ 3,339 | $ 7,078 | $ 6,128 |
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Cost of net revenue [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Stock based compensation | 32 | 26 | 61 | 50 |
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Research and development [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Stock based compensation | 2,384 | 2,158 | 4,578 | 3,912 |
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Selling, general and administrative [Member]
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| Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
| Stock based compensation | $ 1,269 | $ 1,155 | $ 2,439 | $ 2,166 |