Fair Value Measurements - Narrative (Details) - USD ($) |
Sep. 30, 2019 |
Dec. 31, 2018 |
May 25, 2018 |
Dec. 15, 2014 |
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Fair Value Measurements | ||||
Convertible Notes due 2023 | $ 302,785,000 | $ 294,725,000 | ||
Revolving credit facility balance | 100,000,000 | 0 | ||
2019 Convertible Notes | ||||
Fair Value Measurements | ||||
Face amount | $ 172,500,000 | |||
Debt instrument, fair value disclosure | 174,656,000 | 174,101,000 | ||
2019 Convertible Notes | Carrying Value | ||||
Fair Value Measurements | ||||
Convertible Notes due 2023 | 170,966,000 | 165,711,000 | ||
2023 Convertible Notes | ||||
Fair Value Measurements | ||||
Face amount | $ 345,000,000 | |||
Debt instrument, fair value disclosure | 370,923,000 | 339,024,000 | ||
2023 Convertible Notes | Carrying Value | ||||
Fair Value Measurements | ||||
Convertible Notes due 2023 | 302,785,000 | 294,725,000 | ||
Second Amended and Restated Credit Agreement | ||||
Fair Value Measurements | ||||
Revolving credit facility balance | $ 100,000,000 | $ 0 |
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- Definition Carrying amount of long-term convertible debt as of the balance sheet date, net of the amount due in the next twelve months or greater than the normal operating cycle, if longer. The debt is convertible into another form of financial instrument, typically the entity's common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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 The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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