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Convertible Senior Notes - Narrative (Details) - Convertible Debt - Convertible Notes $ / shares in Units, $ in Thousands | Nov. 15, 2018 USD ($) $ / shares | Sep. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Face Amount | $ | $ 210,000 | $ 210,000 | $ 210,000
Interest Rate | 6.25% |  |
Conversion rate | 0.0520183 |  |
Conversion Price | $ / shares | $ 19.22 |  |

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- Definition Contractual interest rate for funds borrowed, under the debt agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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