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Stockholders' Equity - Summary of Activity for Outstanding Three-year PSU Awards (Parenthetical) (Detail) - PSU Awards [Member] | Dec. 31, 2016
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Minimum [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Performance units granted percentage | 0.00%
Maximum [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Performance units granted percentage | 200.00%

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- Definition Share based compensation arrangement by share based payment award equity instruments other than options performance units granted percentage. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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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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- Details
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- Details
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