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Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
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Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Amounts owed to employees participating in the deferred compensation plan | $ 2.1 | $ 2.4
Fair Value, Inputs, Level 2 | Convertible Notes | Convertible Senior Notes due 2024 |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Fair value of debt | 22.5 |
Fair Value, Inputs, Level 2 | Convertible Notes | Convertible Senior Notes due 2026 |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Fair value of debt | 144.6 |
Fair Value, Inputs, Level 2 | Convertible Notes | Convertible Senior Notes due 2027 |  |
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Fair value of debt | $ 230.6 |

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