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Share-based Compensation - Additional Information (Detail) - shares	3 Months Ended		6 Months Ended
	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.

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- References

No definition available.

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