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Earnings Per Share - Additional Information (Detail) - USD ($) $ in Thousands, shares in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |  |  |
Shares repurchased |  |  |  |  | 0.8 |
Shares repurchased at cost |  | $ 7,500 |  | $ 14,069 | $ 7,500 |
Performance Restricted Stock Units [Member] |  |  |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |  |  |
Mark-to-market adjustment | $ (300) |  | $ (500) |  | $ 1,900 | $ (1,400)

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