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Convertible Senior Notes (Tables) | 12 Months Ended
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Dec. 31, 2021
Carrying Value of Convertible Senior Notes | The carrying value of the Company’s convertible senior notes is as follows:
|  | December 31, |
|  | 2021 |  |  | 2020 |
|  | (Amounts in thousands) |
0.375% convertible senior notes due 2024: |  |  |  |  |  |
Principal amount |  | $ | 287,489 |  |  | $ | 287,500 |
Unamortized debt discount |  |  | (28,220 | ) |  |  | (38,317 | )
Unamortized debt issuance costs |  |  | (4,011 | ) |  |  | (5,446 | )
Net carrying amount |  | $ | 255,258 |  |  | $ | 243,737 |

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- Definition Tabular disclosure of convertible debt instrument. Includes, but is not limited to, principal amount and amortized premium or discount. + References No definition available. + Details
Name: | us-gaap_ConvertibleDebtTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration