Stock-based Compensation Plans and Awards - Schedule of stock option activity (Footnote) (Details) - $ / shares |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Stock options | ||
| Stock-based Compensation Plans and Awards | ||
| Fair value per share of common stock (in dollars per share) | $ 13.41 | $ 17.83 |
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- Definition Represents the fair value per share of the common stock of the reporting entity. No definition available.
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| X | ||||||||||
- 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 | ||||||||||
- Details
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