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Long-Term Debt - Convertible Senior Notes Due 2022 (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | May 01, 2022
Debt Instrument [Line Items] |  |  |  |  |
Interest expense | $ 5,034 | $ 5,943 | $ 10,341 | $ 12,055 |
Amortization of debt issuance costs |  |  | 1,161 | 1,587 |
Convertible Senior Notes Maturing May 2022 |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repurchased principal amount |  |  |  |  | $ 35,000
Interest rate (as a percent) |  |  |  |  | 4.80%
Interest expense | $ 100 | 400 | $ 600 | 800 |
Coupon interest expense |  | $ 400 |  | 700 |
Amortization of debt issuance costs |  |  |  | $ 100 |

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