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Stock-Based Compensation - 2018 Market-Based RSAs and RSUs (Details) - 2018 Market-Based RSAs and RSUs - USD ($) $ in Millions |  | 2 Months Ended
--- | --- | ---
Mar. 02, 2018 | Sep. 30, 2018
Market-Based RSAs and RSUs |  |
Stock-based compensation |  |
Reversal of previously recognized compensation expense |  | $ 0.2
Market-Based RSAs and RSUs | Senior Management |  |
Stock-based compensation |  |
Timeframe for calculation of TSR | 3 years |
Aggregate value to be recognized as compensation expense | $ 1.7 |
Market-Based RSAs |  |
Stock-based compensation |  |
Forfeited (in shares) |  | 111,668
Market-Based RSAs | Senior Management |  |
Stock-based compensation |  |
Granted (in shares) | 111,668 |
Market-Based RSUs |  |
Stock-based compensation |  |
Forfeited (in shares) |  | 49,630
Market-Based RSUs | Senior Management |  |
Stock-based compensation |  |
Granted (in shares) | 49,630 |

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- Definition Represents information pertaining to period over which the relative total shareholder return is to be calculated to enable vesting of share-based payment awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + 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 (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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 (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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. + References No definition available. + Details
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