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Stockholders' Equity - Additional Information (Detail) - USD ($) | Oct. 23, 2019 | Sep. 30, 2019 | Jul. 24, 2019 | Feb. 06, 2019 | Jul. 25, 2018 | Sep. 06, 2013
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2013 program |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Increase of the authorization under the stock buyback program |  |  | $ 250,000,000 | $ 250,000,000 | $ 250,000,000 |
Remaining amount approved for repurchases under stock buyback program |  | $ 175,000,000 |  |  |  |
2013 program | Maximum |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Amount approved for repurchases under stock buyback program |  |  |  |  |  | $ 200,000,000
Subsequent Event | Dividend Declared |  |  |  |  |  |
Class Of Stock [Line Items] |  |  |  |  |  |
Dividend per share, declared | $ 0.04 |  |  |  |  |
Dividend payment date | Dec. 19, 2019 |  |  |  |  |
Dividend record date | Dec. 05, 2019 |  |  |  |  |

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