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Convertible Senior Notes - Carrying Amount (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020 | Jun. 11, 2020
--- | --- | --- | ---
Long-Term Debt |  |  |
Carrying amount of Convertible Notes | $ 280,026 | $ 189,416 |
2.75% Convertible Senior Notes due 2027 |  |  |
Long-Term Debt |  |  |
Convertible Notes | 287,500 | 287,500 | $ 287,500
Less: Unamortized debt discount |  | (92,102) |
Less: Unamortized debt issuance costs | (7,474) | (5,982) |
Carrying amount of Convertible Notes | $ 280,026 | $ 189,416 |

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- Definition Carrying value as of the balance sheet date of long-term debt (with maturities initially due after one year or beyond the operating cycle if longer) identified as Convertible Notes Payable, excluding current portion. Convertible Notes Payable is a written promise to pay a note which can be exchanged for a specified amount of another, related security, at the option of the issuer and the holder. + 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) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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