Professional Fees and Other Expenses - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Selling, General and Administrative Expenses [Member] | |||
| Professional Fees And Other Expenses [Line Items] | |||
| Professional fees and other expenses | $ 12.1 | $ 18.7 | $ 25.1 |
| X | ||||||||||
- Definition Professional fees and other expenses incurred in response to allegations. No definition available.
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| X | ||||||||||
- Definition Professional fees and other expenses. No definition available.
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| X | ||||||||||
- Details
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