Stock-Based Compensation Stock-based compensation PBRSU valuation assumption (details) (Details) - PSAs, PSUs and PBRSUs - $ / shares |
12 Months Ended | ||
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Dec. 31, 2019 |
Dec. 31, 2017 |
Sep. 11, 2019 |
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| PBRSU | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Grant-date stock price (AFI closing stock price on September 11, 2019) | $ 7.43 | ||
| share-based compensation PBRUs valuation assumption [Abstract] | |||
| Risk-free rate of return | 1.59% | ||
| Expected volatility | 41.45% | ||
| Dividend yield | 0.00% | ||
| 2016 LTIP Plan | |||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
| Grant-date stock price (AFI closing stock price on September 11, 2019) | $ 15.41 | ||
| share-based compensation PBRUs valuation assumption [Abstract] | |||
| Risk-free rate of return | 1.60% | ||
| Expected volatility | 31.40% | ||
| Dividend yield | 0.00% | ||
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- Definition share-based compensation PBRUs valuation assumption [Abstract] 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. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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 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 Price of a single share of a number of saleable stocks of a company. No definition available.
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