Stock-Based Compensation - Schedule of Stock Option Activity (Detail) - $ / shares	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Granted (in shares)	623,272	669,662
Forfeited (in shares)	(248,834)
Cancelled (in shares)	(43,525)
Exercised (in shares)	(29,919)
Weighted Average Exercise Price
Weighted Average Exercise Price, Outstanding (in dollar per share)	$ 31.45
Granted (in dollar per share)	29.79
Forfeited (in dollar per share)	33.13
Cancelled (in dollar per share)	38.67
Exercised (in dollar per share)	18.00
Weighted Average Exercise Price, Outstanding (in dollar per share)	$ 30.71	$ 31.45
Weighted- Average Remaining Contractual Term (Years)
Weighted- Average Remaining Contractual Term (in years)	7 years 4 months 9 days	7 years 9 months 25 days

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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