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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2021
Share-based Payment Arrangement [Abstract] |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | Fair value was determined using a Black-Scholes option pricing model for in-the-money options and a Monte Carlo simulation model for out-of-the-money options based on the following assumptions:
|  | In-the-money Options |  | Out-of-the-money Options
Assumptions: |  |  |  |
Strike price |  | $8.47 - $20.73 |  | $23.45 - $28.72
Expected life |  | 1.9 - 3.1 years |  | 0.9 - 2.8 years
Expected volatility |  | 41.06% - 45.77% |  | 38.44% - 47.25%
Risk-free rate |  | 0.26% - 0.50% |  | 0.08% - 0.44%
Assumptions to determine the grant date fair value of the equity component and the period-end fair value of the liability | The following assumptions were used to determine the grant date fair value of the equity component on February 17, 2021 and the period-end fair value of the liability component of the TSR Performance Share Awards:
|  | Grant Date |  | September 30, 2021
Fair value per performance share award |  | $ | 16.07 |  |  | $0.94 - $7.76
Assumptions: |  |  |  |
Stock price volatility |  | 39.8 | % |  | 38.53% - 44.44%
Risk-free rate of return |  | 0.20 | % |  | 0.04% - 0.34%

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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