| Litigation and Other Legal Matters Litigation and Other Legal Matters (Details) - California Class Actions | Oct. 21, 2015  action  stockholder | 
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| Loss Contingencies | |
| Number of stockholders filing punitive class actions | stockholder | 4 | 
| Number of actions dismissed | action | 4 | 
| X | ||||||||||
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- Definition Loss Contingency, Number Of Stockholders Filing Actions No definition available. 
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| X | ||||||||||
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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| X | ||||||||||
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- Definition Number of claims dismissed. No definition available. 
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| X | ||||||||||
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- Details 
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