Stock-Based Compensation - Valuation Assumptions (Details) |
Oct. 02, 2017 |
Jun. 20, 2017 |
Oct. 05, 2016 |
Jun. 22, 2016 |
Dec. 01, 2015 |
Apr. 09, 2015 |
Jan. 05, 2015 |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||
| Risk-free Interest Rate | 1.31% | 1.77% | 1.26% | 1.19% | 1.40% | 1.57% | |
| Dividend Yield | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | |
| Stock Volatility | 36.73% | 36.37% | 36.29% | 39.39% | 37.79% | 37.74% | |
| Option Term (years) | 5 years | 10 years | 5 years | 5 years | 10 years | 10 years | |
| Employee | |||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||
| Risk-free Interest Rate | 1.20% | ||||||
| Dividend Yield | 0.00% | ||||||
| Stock Volatility | 36.43% | ||||||
| Option Term (years) | 10 years | ||||||
| Director | |||||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||||||
| Risk-free Interest Rate | 1.20% | ||||||
| Dividend Yield | 0.00% | ||||||
| Stock Volatility | 36.43% | ||||||
| Option Term (years) | 5 years |
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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://www.xbrl.org/2003/role/presentationRef
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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://www.xbrl.org/2003/role/presentationRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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