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Organization, Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2012
Organization, Basis of Presentation and Summary of Significant Accounting Policies and Balance Sheet Details [Abstract] |
Computation of net income (loss) per share |
|  |  | Year Ended December 31, |
|  |  | 2012 |  |  |  | 2011 |  |  |  | 2010 |
|  |  | (in thousands, except per share amounts) |
Numerator: |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) available to common stockholders |  |  | ($25,463 | ) |  |  | ($159,606 | ) |  |  | $12,346 |
Denominator: |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding—basic |  |  | 35,849 |  |  |  | 35,617 |  |  |  | 34,204 |
Potential common shares—options (treasury stock method) |  |  | - |  |  |  | - |  |  |  | 411 |
Weighted average shares outstanding—diluted |  |  | 35,849 |  |  |  | 35,617 |  |  |  | 34,615 |
Shares excluded (anti-dilutive) |  |  | 174 |  |  |  | 126 |  |  |  | - |
Shares excluded due to an exercise price greater than weighted average stock price for the period |  |  | 1,453 |  |  |  | 1,561 |  |  |  | 1,950 |
Net income (loss) per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  | ($0.71 | ) |  |  | ($4.48 | ) |  |  | $0.36 |
Diluted |  |  | ($0.71 | ) |  |  | ($4.48 | ) |  |  | $0.36 |

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