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Share-based Compensation - Additional Information (Detail) - shares | 3 Months Ended | 6 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |  |  |  |
Shares issued under stock purchase plan, stock option exercises and restricted stock awards and units | 152,885 | 40,812 | 186,444 | 251,893

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- Definition Stock shares issued net of shares for tax withholdings. + References No definition available. + Details
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- References No definition available. + Details
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