Fair Value of Financial Instruments - Narrative (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amounts owed to employees participating in the deferred compensation plan	$ 2.0	$ 2.4
Fair Value, Inputs, Level 2 | Convertible Notes | 2024 Notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of debt	21.5
Fair Value, Inputs, Level 2 | Convertible Notes | 2026 Notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of debt	139.1
Fair Value, Inputs, Level 2 | Convertible Notes | 2027 Notes
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Fair value of debt	$ 210.5