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Equity - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Dec. 31, 2016 | Sep. 30, 2020 | Jun. 30, 2020 | Sep. 30, 2020
Equity [Abstract] |  |  |  |  |
Stock repurchase program period |  | 3 years |  |  |
Stock repurchase program, authorized amount |  | $ 100.0 |  |  |
Authorized increase and extension in stock repurchase program amount | $ 300.0 |  |  |  |
Stock repurchase program extended expiration date | 2020-12 |  |  |  |
Shares repurchased |  |  | 0 | 0 | 9,100,000
Shares repurchased average price paid per share |  |  |  |  | $ 36.93
Remaining authorized repurchase amount |  |  | $ 74.2 |  | $ 74.2

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- Definition Stock repurchase program increase and extension in authorized amount. + References No definition available. + Details
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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Period which shares may be purchased under a stock repurchase plan authorized by an entity's Board of Directors, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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