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Earnings Per Share - Narratives (Details) | Dec. 31, 2017 $ / shares
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Convertible Notes, due 2024 | Convertible Debt |
Antidilutive Securities Excluded from Computation of Earnings Per Share |
Warrant exercise price (usd per share) | $ 71.775

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- Definition Exercise price per share or per unit of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)(4)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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