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Shareholders' Equity - Unrecognized Compensation Cost (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($)
Equity [Abstract] |
Total unrecognized compensatoin cost related to unvested share-based payment awards | $ 47.4
Period for recognition of unrecognized compensation cost related to unvested share-based payment awards | 1 year 4 months 24 days
Unrecognized compensation cost expected to be recognized as compensation expense |
2018 | $ 18.8
2019 | 19.6
2020 | 4.4
2021 | 4.5
2022 | 0.2
Total | $ 47.4

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- Definition Unrecognized compensation cost expected to be recognized in year five of the five succeeding years. + References No definition available. + Details
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- Definition Unrecognized compensation cost expected to be recognized in year four of the five succeeding years. + References No definition available. + Details
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- Definition Unrecognized compensation cost expected to be recognized in year one of the five succeeding years. + References No definition available. + Details
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- Definition Unrecognized compensation cost expected to be recognized in year three of the five succeeding years. + References No definition available. + Details
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- Definition Unrecognized compensation cost expected to be recognized in year two of the five succeeding years. + References No definition available. + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- References No definition available. + Details
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