Summary of Significant Accounting Policies - Schedule of Weighted Average Fair Value of Options Granted (Detail) - Performance Based Nonvested [Member] - $ / shares |
12 Months Ended | ||
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Dec. 31, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
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| Schedule Of Weighted Average Assumptions For Fair Values Of Stock Options [Line Items] | |||
| Expected life (years) | 3 years | 3 years | 3 years |
| Risk free interest rate | 0.93% | 0.19% | 1.64% |
| Expected volatility | 27.75% | 28.15% | 18.22% |
| Fair value | $ 157.61 | $ 78.00 | $ 66.96 |
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- Definition Schedule Of Weighted Average Assumptions For Fair Values Of Stock Options [Line Items] No definition available.
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- Definition The estimated measure of the 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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