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Employee Stock and Benefit Plans (Plan Information) (Details) (USD $)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2013
2012 Equity Incentive Plan
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Sep. 26, 2012
2012 Equity Incentive Plan
Maximum
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Sep. 26, 2012
2012 Equity Incentive Plan
Stock Options
|
Dec. 31, 2013
2000 Equity Incentive Plan
Stock Options
|
Dec. 31, 2012
2000 Equity Incentive Plan
Stock Options
|
Dec. 31, 2011
2000 Equity Incentive Plan
Stock Options
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Dec. 31, 2013
2000 Equity Incentive Plan
Stock Options
Minimum
|
Sep. 26, 2012
Increase of Number of Shares Option
2012 Equity Incentive Plan
|
Sep. 26, 2012
Increase of Percentage of Shares Outstanding Option
2012 Equity Incentive Plan
|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||||||
| Equity incentive plan annual increase (in shares) | 3,050,000 | |||||||||||
| Equity incentive plan, annual increase, percent of shares outstanding | 5.00% | |||||||||||
| Award vesting period | 4 years | 4 years | ||||||||||
| Term of award | 10 years | 10 years | ||||||||||
| Expiration period | 10 years | |||||||||||
| Number of shares available for grant | 1,173,450 | [1] | ||||||||||
| Award strike price as a percentage of market value | 85.00% | |||||||||||
| Number of shares available for issuance | 0 | |||||||||||
| Number of shares subject to repurchase (in shares) | 11,145 | 47,220 | ||||||||||
| Number of unvested shares repurchased (in shares) | 500 | 60,126 | 1,000 | |||||||||
| Liability for options early exercised | $ 0.1 | $ 0.3 | ||||||||||
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