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Debt - Convertible Notes (Details) - USD ($) | Jun. 30, 2022 | Dec. 31, 2021 | Jan. 01, 2021 | Sep. 30, 2019 | Aug. 31, 2015
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3.00% Convertible senior notes due 2022 |  |  |  |  |
Long-term debt |  |  |  |  |
Less: Debt discount, net |  |  | $ 0 |  |
3.00% Convertible senior notes due 2022 | Convertible debt |  |  |  |  |
Long-term debt |  |  |  |  |
Principal | $ 150,000,000 | $ 150,000,000 |  |  | $ 150,000,000.0
Less: Debt issuance costs | (92,000) | (460,000) |  |  |
Net carrying amount | 149,908,000 | 149,540,000 |  |  |
1.50% Convertible senior notes due 2026 |  |  |  |  |
Long-term debt |  |  |  |  |
Less: Debt discount, net |  |  | $ 0 |  |
1.50% Convertible senior notes due 2026 | Convertible debt |  |  |  |  |
Long-term debt |  |  |  |  |
Principal | 287,500,000 | 287,500,000 |  | $ 287,500,000 |
Less: Debt issuance costs | (5,040,000) | (5,606,000) |  |  |
Net carrying amount | $ 282,460,000 | $ 281,894,000 |  |  |

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