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Stock-Based Compensation (Summary of Stock-Based Compensation Activity) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
6 Months Ended |
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Jun. 30, 2013
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| Shares | |
| Outstanding and expected to vest at December 30, 2012 | 1,052,861 |
| Granted | 141,119 |
| Exercised | (394,397) |
| Forfeited | (2,175) |
| Outstanding and expected to vest at June 30, 2013 | 797,408 |
| Exercisable at June 30, 2013 | 512,418 |
| Weighted Average Exercise Price | |
| Outstanding and expected to vest at December 30, 2012 | $ 5.28 |
| Granted | $ 28.66 |
| Exercised | $ 2.94 |
| Forfeited | $ 8.22 |
| Outstanding and expected to vest at June 30, 2013 | $ 10.57 |
| Exercisable at June 30, 2013 | $ 5.00 |
| Weighted Average Remaining Contractual Term (Year) | |
| Outstanding and expected to vest at June 30, 2013 | 5 years 11 months 22 days |
| Exercisable at June 30, 2013 | 4 years 5 months 23 days |
| Aggregate Intrinsic Value | |
| Outstanding and expected to vest at June 30, 2013 | $ 22,150 |
| Exercisable at June 30, 2013 | $ 17,086 |
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- Definition
Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Gross number of share options (or share units) granted during the period. No definition available.
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- Definition
Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount by which the current fair value of the underlying stock exceeds the exercise price of fully vested and expected to vest options outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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- Definition
Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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- Definition
Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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