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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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

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No definition available.

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- Definition

Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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- Definition

Number of options outstanding, including both vested and non-vested options.

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- Definition

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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- Definition

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

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No definition available.

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- Definition

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

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No definition available.

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Price of a single share of a number of saleable stocks of a company.

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No definition available.

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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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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Stock-Based Compensation - Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures
Share Price	$ 33.75		$ 33.75
Employee stock options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding
Outstanding at beginning of the period			3,025,587
Exercised			(286,443)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance	2,739,144		2,739,144
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Outstanding at beginning of the period			$ 9.83
Exercised			6.88
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance	$ 10.14		$ 10.14
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures
Weighted average remaining contractual term for option awards outstanding			2 years 7 months 6 days
Intrinsic value of the underlying stock exceeds the exercise price of options outstanding	$ 64,672		$ 64,672
Granted in period			0
Intrinsic value of stock options exercised	1,121	$ 1,035	$ 4,880	$ 2,310
Fair value of stock options vested	$ 451	$ 76	$ 784	$ 175