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Stockholders' Equity - Summarizes the Company's Pre-tax Share-based Incentive Compensation Expense and Income Tax Benefit (Parenthetical) (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2016 USD ($)
2014 Special PSU Awards [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Share-based compensation expense settled in cash | $ 1.6

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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. + References No definition available. + Details
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