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Stockholders' Equity - Summary of Estimated Earned Payout (Detail) | 12 Months Ended
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Dec. 31, 2016
2016 Three-year PSU Awards [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Estimated Payout on Adjusted EBITDA | 100.00%
Estimated Payout on TSR | 100.00%
Estimated Payout Combined | 100.00%
2015 Three-year PSU Awards [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Estimated Payout on Adjusted EBITDA | 100.00%
Estimated Payout on TSR | 168.00%
Estimated Payout Combined | 124.00%
2014 Three-year PSU Awards [Member] |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |
Estimated Payout on Adjusted EBITDA | 200.00%
Estimated Payout on TSR | 188.00%
Estimated Payout Combined | 196.00%

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- Definition Estimated payout percentage. + References No definition available. + Details
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- Definition Estimated payout percentage adjusted EBITDA. + References No definition available. + Details
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- Definition Estimated payout percentage TSR. + References No definition available. + Details
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Period Type: | duration

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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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