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Stock-Based Compensation - Summary of Grants of Performance Based Restricted Stock Units Associated with executive officers and Key Employees (Parenthetical) (Detail) - Senior Executives [Member] - $ / shares | Aug. 02, 2018 | Jul. 13, 2017 | Jul. 18, 2019
--- | --- | --- | ---
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Closing price of common stock | $ 24.35 | $ 32.50 | $ 18.49
Performance Based Restricted Stock Units [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Fair value adjustment to closing price of common stock, percentage | 0.76% | 0.98% |
Fair value adjustment to closing price of common stock, per share | $ 5.84 | $ 0.65 |
Closing price of common stock | $ 24.35 | $ 32.50 | $ 18.49

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- Definition The percentage adjustment to the closing price of common stock to reflect the fair market value per share of common stock determined using the Monte Carlo simulation model. + References No definition available. + Details
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- Definition The increase (decrease) to the closing price of common stock to reflect the fair market value per share of common stock determined using the Monte Carlo simulation model. + References No definition available. + Details
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- Details
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- Details
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