Stock-Based Incentive Compensation Plans - Valuation Assumptions for Stock Options (Details)	9 Months Ended
Sep. 30, 2020 $ / shares
Black-Scholes option-pricing model assumptions
Weighted average grant date fair value per share (in dollars per share)	$ 8.37
Stock Options
Black-Scholes option-pricing model assumptions
Expected volatility, minimum (percent)	46.70%
Expected volatility, maximum (percent)	47.20%
Risk-free interest rate, minimum (percent)	1.56%
Risk-free interest rate, maximum (percent)	1.64%
Dividend yield (percent)	0.00%
Stock Options \| Minimum
Black-Scholes option-pricing model assumptions
Expected term (years)	5 years 6 months
Stock Options \| Maximum
Black-Scholes option-pricing model assumptions
Expected term (years)	7 years

No definition available.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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No definition available.

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The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

No definition available.

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The maximum risk-free interest rate assumption that is used in valuing an option on its own shares.

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No definition available.

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- Definition

The minimum risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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